Academic literature on the topic 'Inversió de rift'
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Journal articles on the topic "Inversió de rift"
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Dooley, Tim P., and Michael R. Hudec. "Extension and inversion of salt-bearing rift systems." Solid Earth 11, no. 4 (July 6, 2020): 1187–204. http://dx.doi.org/10.5194/se-11-1187-2020.
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Abstract. We used physical models to investigate the structural evolution of segmented extensional rifts containing syn-rift evaporites and their subsequent inversion. An early stage of extension generated structural topography consisting of a series of en-échelon graben. Our salt analog filled these graben and the surroundings before continued extension and, finally, inversion. During post-salt extension, deformation in the subsalt section remained focused on the graben-bounding fault systems, whereas deformation in suprasalt sediments was mostly detached, forming a sigmoidal extensional minibasin system across the original segmented graben array. Little brittle deformation was observed in the post-salt section. Sedimentary loading from the minibasins drove salt up onto the footwalls of the subsalt faults, forming diapirs and salt-ridge networks on the intra-rift high blocks. Salt remobilization and expulsion from beneath the extensional minibasins was enhanced along and up the major relay or transfer zones that separated the original sub-salt grabens, forming major diapirs in these locations. Inversion of this salt-bearing rift system produced strongly decoupled shortening belts in basement and suprasalt sequences. Suprasalt deformation geometries and orientations are strongly controlled by the salt diapir and ridge network produced during extension and subsequent downbuilding. Thrusts are typically localized at minibasin margins where the overburden was thinnest, and salt had risen diapirically on the horst blocks. In the subsalt section, shortening strongly inverted sub-salt grabens, which uplifted the suprasalt minibasins. New pop-up structures also formed in the subsalt section. Primary welds formed as suprasalt minibasins touched down onto inverted graben. Model geometries compare favorably to natural examples such as those in the Moroccan High Atlas.
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Tari, Gábor, Didier Arbouille, Zsolt Schléder, and Tamás Tóth. "Inversion tectonics: a brief petroleum industry perspective." Solid Earth 11, no. 5 (October 21, 2020): 1865–89. http://dx.doi.org/10.5194/se-11-1865-2020.
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Abstract. Inverted structures provide traps for petroleum exploration, typically four-way structural closures. As to the degree of inversion, based on a large number of worldwide examples seen in various basins, the most preferred petroleum exploration targets are mild to moderate inversion structures, defined by the location of the null points. In these instances, the closures have a relatively small vertical amplitude but are simple in a map-view sense and well imaged on seismic reflection data. Also, the closures typically cluster above the extensional depocenters which tend to contain source rocks providing petroleum charge during and after the inversion. Cases for strong or total inversion are generally not that common and typically are not considered as ideal exploration prospects, mostly due to breaching and seismic imaging challenges associated with the trap(s) formed early on in the process of inversion. Also, migration may become tortuous due to the structural complexity or the source rock units may be uplifted above the hydrocarbon generation window, effectively terminating the charge once the inversion has occurred. Cases of inversion tectonics can be grouped into two main modes. A structure develops in Mode I inversion if the syn-rift succession in the preexisting extensional basin unit is thicker than its post-rift cover including the pre- and syn-inversion part of it. In contrast, a structure evolves in Mode II inversion if the opposite syn- versus post-rift sequence thickness ratio can be observed. These two modes have different impacts on the petroleum system elements in any given inversion structure. Mode I inversion tends to develop in failed intracontinental rifts and proximal passive margins, and Mode II structures are associated with back-arc basins and distal parts of passive margins. For any particular structure the evidence for inversion is typically provided by subsurface data sets such as reflection seismic and well data. However, in many cases the deeper segments of the structure are either poorly imaged by the seismic data and/or have not been penetrated by exploration wells. In these cases the interpretation in terms of inversion has to rely on the regional understanding of the basin evolution with evidence for an early phase of crustal extension by normal faulting.
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Huang, Lei, Chi-yang Liu, Jun-feng Zhao, and Dong-dong Zhang. "Synrift basin inversion: Significant role of synchronous strike-slip motion in a rift basin." GSA Bulletin 132, no. 11-12 (April 17, 2020): 2572–86. http://dx.doi.org/10.1130/b35435.1.
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Abstract In rift basins with superposed strike-slip deformation, the structural style of wrench elements and the roles they play in synrift architecture and evolution are important, poorly understood issues for basin analysis and hydrocarbon exploration. The NE-SW–striking Tan-Lu fault zone, located in eastern China, runs through the Liaodong Bay subbasin within the Cenozoic Bohai Bay Basin and experienced dextral strike-slip motion during the later synrift stage of the basin (ca. 40 Ma to 23 Ma). Investigations of the Liaodong Bay subbasin indicate that rift-fault reactivation and wrench-fault development during strike-slip reactivation were strongly controlled by the distribution and geometry of preexisting rift faults, and local synrift basin inversion, induced by strike-slip reactivation of a preexisting graben during a later synrift stage, was a significant manifestation of synchronous strike-slip motion modifying synrift architecture and evolution. Moreover, synrift basin inversion within the Liaodong Bay subbasin manifested in two ways. First, stronger inversion occurred along the restraining bends of preexisting extensional faults. This induced uplift of the footwalls of graben-controlling faults, leading to deformation characterized by abundant shortcut thrusts and folds. The Liaodong uplift formed via this mechanism, triggered by strike-slip movement along the Tan-Lu fault zone at ca. 40 Ma. Second, weaker inversion induced by newly formed, subvertical, strike-slip faults occurred near the central part of the graben, with the characteristics of positive flower structures. Although inversion was limited to a very local area along a narrow fault zone, it substantially modified the basin’s physiography. In this rift system, coincident with local inversion-induced uplift, large-scale, rift-related subsidence occurred beyond the inversion belt within the flanking graben, leading to complexity and variety in intrabasinal structural deformation and filling, and exerting a complex influence on hydrocarbon prospects. This model of synrift basin inversion has profound implications for the interpretation of inversion structures and basin dynamics in any rift basin with superposed strike-slip deformation.
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Bosworth, William, and Gábor Tari. "Hydrocarbon accumulation in basins with multiple phases of extension and inversion: examples from the Western Desert (Egypt) and the western Black Sea." Solid Earth 12, no. 1 (January 14, 2021): 59–77. http://dx.doi.org/10.5194/se-12-59-2021.
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Abstract. Folds associated with inverted extensional faults are important exploration targets in many basins across our planet. A common cause for failure to trap hydrocarbons in inversion structures is crestal breaching or erosion of top seal. The likelihood of failure increases as the intensity of inversion grows. Inversion also decreases the amount of overburden, which can adversely affect maturation of source rocks within the underlying syn-extensional stratigraphic section. However, many rift basins are multi-phase in origin, and in some cases the various syn-rift and post-rift events are separated by multiple phases of shortening. When an inversion event is followed by a later phase of extension and subsidence, new top seals can be deposited and hydrocarbon maturation enhanced or reinitiated. These more complex rift histories can result in intra-basinal folds that have higher chances of success than single-phase inversion-related targets. In other basins, repeated inversion events can occur without significant intervening extension. This can also produce more complicated hydrocarbon maturation histories and trap geometries. Multiple phases of rifting and inversion affected numerous basins in North Africa and the Black Sea region and produced some structures that are now prolific hydrocarbon producing fields and others that failed. Understanding a basin's sequence of extensional and contractional events and the resulting complex interactions is essential to formulating successful exploration strategies in these settings.
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Wald, Reli, Amit Segev, Zvi Ben-Avraham, and Uri Schattner. "Structural expression of a fading rift front: a case study from the Oligo-Miocene Irbid rift of northwest Arabia." Solid Earth 10, no. 1 (January 31, 2019): 225–50. http://dx.doi.org/10.5194/se-10-225-2019.
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Abstract. Not all continental rifts mature to form a young ocean. The mechanism and duration of their cessation depend on the crustal structure, modifications in plate kinematics, lithospheric thermal response, or the intensity of subcrustal flow (e.g., plume activity). The cessation is recorded in the structure and stratigraphy of the basins that develop during the rifting process. This architecture is lost due to younger tectonic inversion, severe erosion, or even burial into greater depths that forces their detection by low-resolution geophysical imaging. The current study focuses on a uniquely preserved Oligo-Miocene rift that was subsequently taken over by a crossing transform fault system and, mostly due to that, died out. We integrate all geological, geophysical, and previous study results from across the southern Galilee to unravel the structural development of the Irbid failing rift in northwest Arabia. Despite tectonic, magmatic, and geomorphologic activity postdating the rifting, its subsurface structure northwest of the Dead Sea fault is preserved at depths of up to 1 km. Our results show that a series of basins subsided at the rift front, i.e., rift termination, across the southern Galilee. We constrain the timing and extent of their subsidence into two main stages based on facies analysis and chronology of magmatism. Between 20 and 9 Ma grabens and half-grabens subsided within a larger releasing jog, following a NW direction of a deeper presumed principal displacement zone. The basins continued to subside until a transition from the transtensional Red Sea to the transpressional Dead Sea stress regime occurred. With the transition, the basins ceased to subside as a rift, while the Dead Sea fault split the jog structure. Between 9 and 5 Ma basin subsidence accentuated and an uplift of their margins accompanied their overall elongation to the NNE. Our study provides for the first time a structural as well as tectonic context for the southern Galilee basins. Based on this case study we suggest that the rift did not fail but rather faded and was taken over by a more dominant stress regime. Otherwise, these basins of a failing rift could have simply died out peacefully.
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Cruz, Simone C. P., and Fernando F. Alkmim. "The Tectonic interaction between the Paramirim Aulacogen and the Araçuaí Belt, São Francisco craton region, Eastern Brazil." Anais da Academia Brasileira de Ciências 78, no. 1 (March 2006): 151–73. http://dx.doi.org/10.1590/s0001-37652006000100014.
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The Paramirim aulacogen, hosted in the northern part of the São Francisco craton, corresponds to two superimposed and partially inverted rifts of Paleo and Neoproterozoic ages. The Rio Pardo salient of the Araçuaí belt defines the local limit of the craton and interferes with the aulacogen structures. In order to understand the mechanism and timing of the tectonic interaction between these tectonic features during the inversion processes, a structural analysis was undertaken in the southern Paramirim aulacogen and along the Rio Pardo salient. The results obtained indicate that the Rio Pardo salient formed during an early stage of closure of the Neoproterozoic Macaúbas rift system and consequent initiation of the Araçuaí orogen. The orogenic front propagated further northwards into the craton, causing a first stage of inversion in the southern terminus of the aulacogen trough. Subsequently, the Paramirim aulacogen experienced the main stage of inversion, which led to the development of a NNW-oriented basement involved fold-thrust system. These fabric elements overprint the Rio Pardo salient, and the structures of both the first and second stages of inversion affect the Salitre Formation, the youngestNeoproterozoic unit of the area, clearly indicating a Late Neoproterozoic maximum age for all the inversion stages of the Paramirim aulacogen.
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Feng, Xuliang, Wanyin Wang, and Bingqiang Yuan. "3D gravity inversion of basement relief for a rift basin based on combined multinorm and normalized vertical derivative of the total horizontal derivative techniques." GEOPHYSICS 83, no. 5 (September 1, 2018): G107—G118. http://dx.doi.org/10.1190/geo2017-0678.1.
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The basement of a rift sedimentary basin, often possessing smooth and nonsmooth shapes, is not easily recovered from gravity data by current inversion methods. We have developed a new 3D gravity inversion method to estimate the basement relief of a rift basin. In the inversion process, we have established the objective function by combining the gravity data misfit function, the known depth constraint function, and the model constraint function composed of the [Formula: see text]-norm and [Formula: see text]-norm, respectively. An edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for gravity data is adopted to recognize the discontinuous and continuous parts of the basin and combine the two inputs to form the final model constraint function. The inversion is conducted by minimizing the objective function by the nonlinear conjugate gradient algorithm. We have developed two applications using synthetic gravity anomalies produced from two synthetic rift basins, one with a single graben and one with six differently sized grabens. The test results indicate that the inversion method is a feasible technique to delineate the basement relief of a rift basin. The inversion method is also tested on field data from the Xi’an depression in the middle of the Weihe Basin, Shaanxi Province, China, and the result illustrates its effectiveness.
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Lescoutre, Rodolphe, and Gianreto Manatschal. "Role of rift-inheritance and segmentation for orogenic evolution: example from the Pyrenean-Cantabrian system." BSGF - Earth Sciences Bulletin 191 (2020): 18. http://dx.doi.org/10.1051/bsgf/2020021.
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The Basque-Cantabrian junction corresponds to an inverted rift accommodation zone at the limit between the former hyperextended Pyrenean and Cantabrian rift segments. The recognition of an inherited rift segment boundary allows to investigate the reactivation associated with large-scale rift segmentation in an orogenic system. We use criteria from published field observations and seismic data to propose a new map of rift domains for the Basque-Cantabrian junction. We also provide balanced cross-sections that allow to define the along-strike architecture associated with segmentation during rifting and subsequent Alpine reactivation. Based on these results, this study aims to characterize and identify reactivated and newly formed structures during inversion of two rift segments and its intermitted segment boundary. It also aims to describe the timing of thin-skinned and thick-skinned deformation associated with the inversion of segmented rift systems. During convergence, two phases have been recognized within the rift segment (eastern Mauléon basin). The Late Cretaceous to Paleocene underthrusting/subduction phase was mostly governed by thin-skinned deformation that reactivated the former hyperextended domains and the supra-salt sedimentary cover. The Eocene to Miocene collisional phase, controlled by thick-skinned deformation that took place once necking domains collided and formed an orogenic wedge. At the rift segment boundary, the underthrusting/subduction phase was already controlled by thick-skinned deformation due to the formation of shortcutting thrust faults at the termination of overlapping V-shaped rift segments. This led to the formation of a proto-wedge composed of the Basque massifs. We suggest that this proto-wedge is responsible for the preservation of pre-Alpine structures in the Basque massifs and for the emplacement of subcontinental mantle rocks at a crustal level beneath the western Mauléon basin. These results argue for a first order cylindrical orogenic architecture from the Central Pyrenean segment to the Cantabrian segment (up to the Santander transfer zone) despite rift segmentation. They also highlight the control of 3D rift-inheritance for the initial phase of orogenic evolution and for the local architecture of mountain belts.
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Salem, Ahmed, Chris Green, Matthew Stewart, and Davide De Lerma. "Inversion of gravity data with isostatic constraints." GEOPHYSICS 79, no. 6 (November 1, 2014): A45—A50. http://dx.doi.org/10.1190/geo2014-0220.1.
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We have developed a simple iterative gravity-inversion approach to map the basement and Moho surfaces of a rift basin simultaneously. Gravity anomalies in rift basins commonly consist of interfering broad, positive crustal-thinning anomalies and narrow, negative sedimentary-basin anomalies. In our model, we assumed that the Moho and basement surfaces are in Airy isostatic equilibrium. An initial plane-layered model was iterated to fit the gravity data. We applied the process to a model in which the inverted basement and Moho surfaces matched the model surfaces well and to a gravity profile across the Kosti Basin in Sudan.
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Ramos, Adrià, Berta Lopez-Mir, Elisabeth P. Wilson, Pablo Granado, and Josep Anton Muñoz. "3D reconstruction of syn-tectonic strata in a salt-related orogen: learnings from the Llert syncline (South-central Pyrenees)." Geologica Acta 18 (December 11, 2020): 1–19. http://dx.doi.org/10.1344/geologicaacta2020.18.20.
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The Llert syncline is located in the South-central Pyrenees, between the eastern termination of the EW-trending Cotiella Basin and the north-western limb of the NS-trending Turbón-Serrado fold system. The Cotiella Basin is an inverted upper Coniacian-lower Santonian salt-floored post-rift extensional basin developed along the northern Iberian rift system. The Turbón-Serrado fold system consists of upper Santonian – Maastrichtian contractional salt-cored anticlines developed along an inverted transfer zone of the Pyrenean rift system. Based on field research, this paper presents a 3D reconstruction of the Llert syncline in order to further constrain the transition between these oblique salt-related structures. Our results suggest that the evolution of the Llert syncline was mainly controlled by tectonic shortening related to the tectonic inversion of the Cotiella Basin synchronously to the growth of the Turbón-Serrado detachment anticline, and by the pre-compressional structural framework of the Pyrenean rift system. Our contribution provides new insight into the geometric and kinematic relationships of structures developed during the inversion of passive margins involving salt.
Dissertations / Theses on the topic "Inversió de rift"
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Domènech, Verdaguer Mireia. "Rift opening and inversion in the Marrakech High Atlas: integrated structural and thermochronologic study." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/327877.
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El Alto Atlas de Marruecos se formó por la inversión durante el Cenozoico de un rift continental que se formó durante el Triásico-Jurásico. El Alto Atlas de Marrakech, donde afloran principalmente materiales del basamento y del Triásico sinrift, había sido considerado como un alto o zona poco subsidente durante el rifting Triásico-Jurásico. El estudio multidisciplinario presentado en esta tesis, que integra análisis estructural y termocronología de baja temperatura, revela que el rifting Triásico-Jurásico tuvo un desarrollo completo en el Alto Atlas de Marrakech (con espesores de materiales Triásico-Jurásicos de hasta 4.5-6 km) y por tanto, sugiere que el rift del Tethys y del Atlántico estaban conectados durante el Triásico hasta el Jurásico medio-superior. El estudio de las principales cuencas Triásicas y sus fallas limitantes indican un mecanismo de apertura en extensión, siendo los movimientos direccionales menores, lo que difiere de previas interpretaciones que sugerían un modelo de apertura con movimientos direccionales importantes, incluyendo la zona de falla de Tizi n’Test. La buena exposición de las fallas y cuencas Triásicas proporciona buenos análogos de campo para la exploración en el subsuelo de sistemas extensionales de pre-sal. El análisis estructural también muestra que el rift del Alto Atlas de Marrakech fue estrecho, muy segmentado y que se desarrolló en una dirección ortogonal a la dirección de extensión regional de la época (~NW-SE), a diferencia del Alto Atlas central que desarrolló de forma oblicua. Esta diferencia en la orientación del rift la atribuyo a la indentación del macizo precámbrico del Ouzellarh (parte del Cratón Africano), que desvió la dirección general del rift evidenciando el marcado rol que ejerce la anisotropía litosférica heredada en la dirección y evolución del rift. En cuanto a los resultados de termocronología de (U-Th)He, las edades de enfriamiento de zHe del Jurásico medio-superior a Cretácico inferior obtenidas en el Alto Atlas de Marrakech indican que la subsidencia relacionada con el rift cesó en el Jurásico medio tardío, seguida por un periodo de exhumación en el que se erosionaron 2-3 km de roca. Este resultado, conjuntamente con resultados similares obtenidos por autores previos en la Meseta y el Anti-Atlas muestran una amplia área de exhumación durante esa época, siguiendo la orientación del margen Atlántico. Los modelos térmicos basados en los datos de termocronología de zHe y aHe indican que la orogenia Atlásica en las zonas internas de la cordillera empezó en el Cretácico superior. Los modelos muestran que la exhumación relacionada con la compresión se aceleró en el Oligoceno o en el Mioceno, lo cual es coherente con depósitos sinorogénicos datados anteriormente en las cuencas de antepaís periféricas. El acortamiento orogénico en el Alto Atlas de Marrakech se acomodó por pliegues de gran longitud de onda donde el basamento está involucrado, y por la creación de cabalgamientos de tipo shortcut o by-pass. Los indicadores de movimiento direccional en dichos cabalgamientos son menores. Tanto las evidencias estructurales de campo como los datos de termocronología indican que les fallas activas durante la extensión Triásico-Jurásico no fueron reactivadas en la etapa compresiva, actuando como butresses. La comparación entre las secciones estructurales actuales y la reconstrucción de las cuencas Triásicas-Jurásicas apoyada en la termocronología sugiere acortamientos mínimos totales para el Alto Atlas de Marrakech de entre 13 y 14.2 km (21% y 17% respectivamente).The High Atlas of Morocco is an aborted continental rift developed during the Triassic-Jurassic and moderately inverted during the Cenozoic. The Marrakech High Atlas, with large exposures of basement and Triassic early syn-rift deposits, has been viewed as a morphologic high or a poorly subsiding domain during the Triassic-Jurassic rifting. The multidisciplinary approach presented in this thesis that integrates structural analysis and low-temperature thermochronology reveals that the Triassic-Jurassic rift was well developed in the Marrakech High Atlas (4.5-6 km thickness of Triassic-Jurassic deposits) and suggests that the Tethys and Atlantic rifts were connected in Triassic to Mid-Late Jurassic times. The main Triassic basins and basin-margin faults show a dominant dip-slip opening kinematics with strike-slip playing a minor role, at variance to models proposing a major strike-slip component, including faults belonging to the Tizi n’Test fault zone. Well-exposed fault and graben structures provide good analogues for the exploration of pre-salt systems in the subsurface. This multidisciplinary study also shows that the Marrakech High Atlas was a narrow and highly segmented orthogonal rift (sub-perpendicular to the main regional extension direction which was ~NW-SE), in contrast to the central and eastern segments of the Atlas rift which developed obliquely. This difference in orientation is attributed to the indented Ouzellarh Precambrian salient, part of the West African Craton, which deflected the general rift trend in the area evidencing the major role of inherited lithospheric anisotropies in rift direction and evolution. The Mid-Late Jurassic to Early Cretaceous zHe cooling ages obtained in certain areas indicate that rift-related subsidence in the Marrakech High Atlas finished in late Mid Jurassic times and was followed by a period of exhumation where nearly 2-3 km of rock were eroded. This, together with previous results in the Moroccan Meseta and Anti-Atlas, define a Mid-Late Jurassic to Early Cretaceous exhuming high following the orientation of the current Atlantic margin. Thermal models based on thermochronologic data indicate that Atlas orogeny in the inner parts of the High Atlas started in the Late Cretaceous, and compression-related exhumation accelerated since the Oligocene or Miocene, consistent with dated tectonics-sedimentation relationships elsewhere. Shortening appears accommodated by basement-involved large-scale folding, and by newly formed shortcut or by-pass thrusting, with rare left-lateral strike-slip indicators. Field structural evidence and thermochronology show that Triassic faults were mostly not reactivated, acting as buttresses. The Triassic-Jurassic basins reconstruction assisted by thermochronology and on the constrained tectonic structures, when compared with present-day cross-sections, suggests minimum values of total shortening in the Marrakech High Atlas of 13 to 14.2 km (21% to 17%).
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Plasman, Matthieu. "Rupture lithosphérique continentale dans le rift Africain : apport de l'inversion conjointe." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0029/document.
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L'inversion conjointe géophysique est la méthode la plus efficace pour imager l'intérieur de la Terre. En intégrant plusieurs techniques géophysiques elle permet de réduire les incertitudes inhérentes à chacune et ainsi améliorer la compréhension de la Terre. Dans cette étude, nous utilisons les techniques des fonctions récepteur (RF) en sismologie, de la magnétotellurique (MT) et de la gravimétrie qui permettent de caractériser respectivement la vitesse des ondes S, la résistivité électrique et la densité du sous-sol.Le but de ce travail de recherche se divise en deux parties: une première, méthodologique, sur le développement d'une nouvelle approche d'inversion conjointe en 3D et une deuxième avec l'application de ces techniques (en approche jointe ou séparée) sur la Divergence Nord Tanzanienne pour mieux comprendre le phénomène de rupture continentale. Pour la partie méthodologie deux approches ont été développées : une entre les données de MT et de gravimétrie avec un calcul original de l'effet gravimétrique de la topographie qui permet de réduire le nombre de mailles tout en gardant une résolution satisfaisante ; et une deuxième méthode entre les données de MT et de RF par une nouvelle approche d'extrapolation des modèles 1D de vitesse en pseudo modèle 3D de vitesse. L'application de ces techniques sur la Tanzanie a permis de mettre en évidence un certain nombre de structures lithosphériques dont deux zones majeures à faible vitesse dans la croûte inférieure et dans le manteau supérieur. Cette dernière semble refléter des interactions entre des structures héritées d'âge protérozoïque et le panache mantellique AfricainGeophysical joint inversion attempts to reproduce as best as possible the interior of the Earth. By integrating several geophysical techniques the joint inversion reduces the uncertainties of each methods and improves our understanding of the Earth structure. In this study we use the receiver functions (RF), the magnetotelluric (MT) and the gravity methods which enable to charaterize the Swave velocity, the electrical resistivity and the density, respectively. The objective of this research work is divided in two parts; first with the development of a new 3D joint inversion approach and then with the application of these methods (on a joint or separate approach) on the North Tanzanian Divergence to better understand the continental breakup.For the methodologic part two approaches have been developed; one between the MT and gravity data with an original computation of the topographic effect which decreases the number of cells while keeping a satisfaying resolution. And a second method between the MT and RF data where pseudo 3D velocity model are created and combined with the MT models to better takes into account the physical properties of the receiver function. The application of these methods on the Tanzania highlighted several lithospheric structures and particularly two low-velocity areas in the lower crust and the upper mantle. This latter suggests interactions with Proterozoic inherited structures and the African plume material
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Kardell, Dominik Alexander, and Dominik Alexander Kardell. "Volume Estimation of Rift-Related Magmatic Features using Seismic Interpretation and 3D Inversion of Gravity Data on the Guinea Plateau, West Africa." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/621182.
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The two end-member concept of mantle plume-driven versus far field stress-driven continental rifting anticipates high volumes of magma emplaced close to the rift-initiating plume, whereas relatively low magmatic volumes are predicted at large distances from the plume where the rifting is thought to be driven by far field stresses. We test this concept at the Guinea Plateau, which represents the last area of separation between Africa and South America, by investigating for rift-related volumes of magmatism using borehole, 3D seismic, and gravity data to run structural 3D inversions in two different data areas. Despite our interpretation of igneous rocks spanning large areas of continental shelf covered by the available seismic surveys, the calculated volumes in the Guinea Plateau barely match the magmatic volumes of other magma-poor margins and thus endorse the aforementioned concept. While the volcanic units on the shelf seem to be characterized more dominantly by horizontally deposited extrusive volcanic flows distributed over larger areas, numerous paleo-seamounts pierce complexly deformed pre and syn-rift sedimentary units on the slope. As non-uniqueness is an omnipresent issue when using potential field data to model geologic features, our method faced some challenges in the areas exhibiting complicated geology. In this situation less rigid constraints were applied in the modeling process. The misfit issues were successfully addressed by filtering the frequency content of the gravity data according to the depth of the investigated geology. In this work, we classify and compare our volume estimates for rift-related magmatism between the Guinea Fracture Zone (FZ) and the Saint Paul's FZ while presenting the refinements applied to our modeling technique.
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Abdelfettah, Yassine. "Inversion conjointe des données magnétotelluriques et gravimétriques : application à l'imagerie géophysique crustale et mantellique." Phd thesis, Université de Bretagne occidentale - Brest, 2009. http://tel.archives-ouvertes.fr/tel-00424413.
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Pour mieux comprendre les résultats géophysiques en termes de géologie, il est important d'utiliser différents types de données acquises par plusieurs méthodes. Une seule méthode géophysique n'a pas nécessairement la résolution suffisante pour expliquer la géologie. Avec une seule méthode, il peut être difficile de donner un sens géologique aux anomalies observées dans les modèles. L'inversion conjointe, en revanche, est une approche permettant de combiner des données de différentes natures. L'inversion conjointe peut être réalisée de deux façons : structurale ou pétrophysique. On peut subdiviser les inversions conjointes en deux groupes : l'inversion conjointe de méthodes sensibles au même paramètre physique comme les sondages électriques DC-DC et AC-DC, et l'inversion conjointe de méthodes sensibles aux paramètres de natures différentes, comme la gravimétrie et la sismique ou la sismique et la magnétotellurique (MT).Dans ce travail de thèse, je présente la solution de l'inversion conjointe de données MT et gravimétriques. La bonne résolution verticale mais la faible couverture spatiale des données MT peuvent être complémentaire des données gravimétriques qui possèdent une excellente couverture spatiale mais une faible résolution verticale.Le problème qui se pose dans l'inversion conjointe de données de différentes natures, est comment relier les différents paramètres. Des formules analytiques entre les vitesses sismiques et les densités ou entre les résistivités électriques et les densités sont destinées à des études spécifiques. En général, il n'est pas évident de relier les paramètres par des relations pétrophysiques. Par conséquent, il est nécessaire de développer des algorithmes qui n'imposent pas de relation spécifique entre les paramètres. L'approche d'inversion conjointe présentée ici est assez générale. Je pose une fonction de condition géométrique (GCF) sous laquelle les paramètres varient dans le même domaine pour imager les mêmes milieux.La méthodologie développée durant cette thèse est testée et validée sur des modèles synthétiques. Une application est réalisée sur les données réelles acquises dans la région de Turkana, Nord Kenya, une branche du Rift Est Africain. Les résultats obtenus ont permis de confirmer certaines conclusions apportées par les résultats de la sismique réflexion et d'apporter de nouvelles informations. L'étude a permis, en effet, de mettre en évidence deux Bassins en forme de demi-graben et de déterminer l'épaisseur des basaltes, jusque là inconnus. Une stratigraphie est proposée pour les bassins de Turkana et de Kachoda. Concernant l'étude de la lithosphère, nos résultats montrent une croûte très hétérogène et un manteau supérieur homogène. Deux anomalies (conductrices et moins denses) ont été mises en évidence entre la croûte inférieure.Ces anomalies peuvent être des zones de fusion partielle à priori sont déconnectées du manteau supérieur ou s'est initié la fusion.
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Renzi, Cédric. "Identification expérimentale de sources vibratoires par résolution du problème inverse modélisé par un opérateur éléments finis local." Thesis, Lyon, INSA, 2011. http://www.theses.fr/2011ISAL0146/document.
Full textAbstract:
L'objet de cette thèse est l'extension aux structures complexes de la méthode de Résolution Inverse Fenêtrée Filtrée (RIFF). L'idée principale se base sur le modèle Eléments Finis local et libre d'une partie de la structure étudiée. Tout d'abord, la méthode a été développée dans le cas des poutres. Les mesures de vibrations sont alors injectées dans le modèle Eléments Finis de la partie de poutre analysée. Les rotations sont estimées à l'aide de mesures de déplacements supplémentaires et des fonctions de forme sur le support élémentaire. La méthode étant sensible vis-à-vis des incertitudes de mesures, une régularisation a dû être développée. Celle-ci repose sur une double inversion de l'opérateur où une régularisation de type Tikhonov est appliquée dans la seconde inversion. L'optimisation de cette régularisation est réalisée par le principe de la courbe en L. A cause des effets de lissage induits par la régularisation, les moments ne peuvent être reconstruits mais ils apparaissent comme des ''doublets'' de forces. Ceci nous a conduit à résoudre le problème en supposant que seules des forces agissent sur la poutre. Enfin, une étude des effets de la troncature du domaine a été menée dans le but de s'affranchir des efforts de couplage apparaissant aux limites de la zone étudiée. Le cas des plaques a été considéré ensuite afin d'augmenter progressivement la complexité des modèles utilisés. L'approche Eléments Finis a permis d'intégrer à la méthode des techniques de condensation dynamique et de réduction par la méthode de Craig-Bampton. Le nombre de degrés de liberté est trop élevé pour permettre une estimation des rotations par mesures de déplacements supplémentaires, la condensation dynamique est employée afin de les supprimer dans le modèle théorique. Par ailleurs, la régularisation induisant une perte de résolution spatiale à cause de son effet de lissage, une procédure de déconvolution spatiale basée sur l'algorithme de Richardson-Lucy a été ajoutée en post traitement. Enfin, une application de la méthode à la détection de défauts a été envisagée de même que l'application de la méthode à l'identification des efforts appliqués par une pompe à huile sur un banc d'essais industriel. Le travail s'est donc appuyé sur des développements numériques et la méthode a été validée expérimentalement en laboratoire et en contexte industriel. Les résultats de la thèse fournissent un outil prédictif des efforts injectés par des sources de vibrations raccordées à une structure en s'appuyant sur un modèle Eléments Finis local et des mesures de déplacements vibratoires, le tout en régime harmoniqueThe object of this thesis is the extension to complex structures of the RIFF method (Résolution Inverse Fenêtrée Filtrée). Considering a subpart of a structure, the main idea is to build a local Finite Element model using free boundary conditions. First, the general method was developed on beams. Vibration measurements are injected in the Finite Element model of the analysed part of the beam. Rotations are estimated using extra-displacement measurements and elementary shape functions. The method is highly sensitive towards errors present in measurements, so a regularisation had to be used. This one consists in a double inversion of the operator where a Tikhonov regularisation is applied when performing the second inversion. The regularisation parameter is tuned by the L-curve principle. Because of the smoothing effect of the Tikhonov procedure, moments cannot be reconstructed anymore at this stage, but they do still appear as sets of opposite forces. This setback led us to solve the problem by restricting it to forces only equations. At last, the study of the truncature of the domain was conducted in the aim to suppress coupling forces appearing at the limits of the studied area. Then, the case of plates was considered in order to increase progressively the models’ complexities. The Finite Element approach permitted us to implement dynamical condensation as well as Craig-Bampton reduction techniques. This allowed us to reduce the total number of degrees of freedom to be taken into account both from a numerical and an experimental standpoint. For example, dynamical condensation allows to eliminate rotations in the model. Besides, regularisation induces a lack of spatial resolution because of its smoothing effect. A spatial deconvolution technique was therefore developed; it is based on the Richardson-Lucy algorithm which is applied at a post-processing stage. At last, it was successfully proposed to extend the method to the application of detecting defaults present in the structure. The method was also validated on an industrial test bench in order to identify the forces applied by an oil pump taken from a truck’s engine. This phD thesis relied on numerical developments and the method was validated experimentally both in laboratory and industrial context. Main results provide a predictive tool to evaluate injected forces by vibration sources linked to a structure. It necessitates to inject vibratory displacements measurements into a Finite Element model
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Saspiturry, Nicolas. "Évolution sédimentaire, structurale et thermique d'un rift hyper-aminci : de l'héritage post-hercynien à l'inversion alpine : exemple du bassin de Mauléon (Pyrénées)." Thesis, Bordeaux 3, 2019. http://www.theses.fr/2019BOR30040.
Full textAbstract:
Localisé dans les Pyrénées occidentales, l’étude du bassin de Mauléon, permet d’appréhender l’évolution tectono-sédimentaire et thermique d’un rift hyper-aminci de son héritage pré-extensif à son inversion (cycle complet de Wilson). L’épisode permien reflète le passage de la convergence N-S enregistrée dans la Zone Axiale (310 à 290 Ma) à une phase d’extension E-W (290 et 275 Ma), conférant un héritage thermique, structural et rhéologique complexe à la lithosphère des Pyrénées occidentales. La préservation des traits paléogéographiques permo-triasiques rend impossible la réalisation d’un mouvement décrochant sénestre E-W au Mésozoïque entre l’Ibérie et l’Europe, dans cette partie des Pyrénées, questionnant les modalités d’ouverture des bassins nord-pyrénéens au Crétacé. Au cours de l’orogenèse alpine, le bassin hyper-étiré de Mauléon est inversé. La réactivation des structures crétacées conduit à la formation d’un pop-up lithosphérique dont les bordures présentent des styles de réactivation différents, localisé (Ibérie) vs distribué (Europe). La protubérance mantélique héritée de la phase de rifting crétacée empêche l’inversion complète du rift en jouant le rôle de buttoir. En 3D, les systèmes de chevauchement sont composés de plusieurs segments délimités par les zones de transferts N20° héritées du Permien conférant un caractère non-cylindrique au structures orogéniques pyrénéennes. L’héritage permien et crétacé contrôle à la fois l’évolution thermique synrift et post-collisionnelle du bassin de Mauléon. Les paléo-gradients géothermiques synrifts augmentent de manière graduelle des marges (~ 34°C/km) vers le bassin (~ 60°C/km). La température maximale est alors contrôlée par l’enfouissement et le flux thermique mantélique (100 mW.m-2). La différence de réponse thermique observées sur les bordures du bassin de Mauléon est liée au style de déformation compressive : diminution du gradient dans le domaine hyper-étiré et la marge européenne ~ 25.0 ± 2.7°C/km vs augmentation du gradient sur la marge ibérique < 30°C/km). L’étude tectono-sédimentaire des bassins mésozoïques adjacents d’Arzacq et de Tartas, couplée à un travail de synthèse sur les bassins péri-ibériques souligne les nombreuses différences existant entre ces bassins et ceux des marges hyper-étirées atlantiques. L’évolution de ces « bassins extensifs à pente douce » comprend trois grands stades de déformation : (1) un amincissement ductile de la croûte inférieure, sans déformation cassante significative dans la croûte supérieure, formant un rift symétrique (sag) ; (2) un glissement de la couverture prerift sur les évaporites du Trias; (3) une phase d’hyper-extension avec déformation fragile des marges proximales et amincissement ductile du domaine distal hyper-étiré (métamorphisme HT/BP)The western Pyrenean Mauléon basin allows to discuss the tectono-sedimentary and thermal evolution of a hyperextended rift through an entire Wilson cycle. During Permian time, the western Pyrenees record the shift between N-S convergence recorded in the Pyrenean Axial Zone (310 to 290 Ma) and dominant E-W extension (290 to 275 Ma). This latter stage is responsible for a complex thermal, structural and compositional inheritance of the Pyrenean lithosphere. The preservation of the original Permian-Triassic paleogeography and structure in the “Basque Massif” indicates that there was no major east-west Mesozoic strike-slip motion between the Iberian and European plates in this part of the Pyrenees, questioning the mechanisms responsible for the opening of the Early Cretaceous North-Pyrenean rift system. The Cretaceous Mauléon hyperextended rift basin was inverted during the Alpine orogeny. Reactivation of the former rift structures leads to the formation of a lithospheric scale pop-up whose edges are characterized by differing tectonic reactivation style, localized (Iberia) vs distributed (Europe). The previously exhumed mantle acts as a buttress inhibiting the complete closure of the basin. In 3D, the N120° thrusts systems edging the pop-up are composed of different thrust segments branching into the inherited Permian N20° transfer zones, highlighting the non-cylindrical geometry of the Pyrenean structures. Permian and Cretaceous structural inheritance both control the synrift and post-collisional thermal evolution of the Mauléon basin. Synrift paleogeothermal gradients gradually increased from the margins (~ 34°C/km) to the basin (~ 60°C/km). Maximum peak temperatures are both controlled by sedimentary burial and mantle heat flow (100 mW.m-2). The different post-collisional thermal responses of the Mauléon basin pop-up edges is linked to their tectonic reactivation style. On the European margin, the postrift isotherms were passively transported onto the proximal margin (« thin-skinned »). On the Iberian margin, peak temperatures were acquired after thrusting (« thick-skinned »). The review of the hyperextended Iberian-Eurasian plate boundary basins shows that they strongly differ from classical Atlantic-type passive margins. Three main stages of continental crust thinning can be inferred to describe the evolution of this smooth-slope type extensional basin : (1) a dominant ductile thinning of the lower crust, without significant brittle deformation of the upper crust, resulting in the formation of a symmetric sag basin; (2) basinward gliding of the prerift cover along the Late Triassic evaporites; (3) hyper-extension with brittle deformation on the proximal margins and dominant ductile thinning on the hyperextended rift domain (HT/LP metamorphism)
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Wassereau, Thibault. "Caractérisation de matériaux composites par problème inverse vibratoire." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1041/document.
Full textAbstract:
L’usage croissant des matériaux composites dans l’industrie induit de nouvelles problématiques dans des domaines variés,notamment pour la caractérisation non destructive. Les méthodes courantes comme l’analyse modale ou les éléments finis sont rarement adaptées pour représenter la dynamique vibratoire complexe des structures composites ou quantifier leurs caractéristiques viscoélastiques, de nouvelles approches sont nécessaires.Les travaux concernent le développement et l’application d’un formalisme vibratoire inverse local, la méthode RIFF(Résolution Inverse Filtrée Fenêtrée), pour l’étude des matériaux composites multicouches. Ces derniers sont considérés comme homogènes à l’aide de la théorie de Timoshenko, prenanten compte le cisaillement non négligeable de ces matériaux.Une caractérisation fréquentielle et/ou spatiale des paramètres équivalents (modules d’Young E et de cisaillement G, et facteurs de pertes associés) est alors possible, permettant de traduire fidèlement le comportement dynamique des composites et de simplifier leur modélisation en éléments finis.Une seconde approche utilisant un schéma aux différences finies corrigé (méthode RIC) autorise une analyse similaire à partir d’un maillage grossier diminuant fortement les temps de mesure et de post-traitement des données.Enfin, une perspective de détection et d’identification de défauts est envisagée. Grâce à des cartographies des paramètres élastiques et d’amortissements, il semble possible de pouvoir déduire la signature d’un défaut typique. Une discontinuité du module de cisaillement témoignerait de la présence d’un délaminage, la diminution du module d’Young traduirait une rupture de fibres, etcThe increasing use of composite materials in the industry leadsto new challenges in various areas, including non-destructiveevaluation. Common methods such as modal analysis or finiteelements are rarely appropriated to represent the complexvibratory dynamic of composite structures or quantify theirviscoelastic properties, new approaches are then needed.This thesis deals with the development and application of a localinverse vibratory method, called the Force Analysis Technique(FAT), in order to the study multilayer composites. The latterare considered to be homogeneous using the Timoshenko beamtheory, which takes shear effects into account, usually significantfor such structures. A frequency and/or spatial characterizationof the equivalent elastic parameters (Young’s modulus E, shearmodulus G and their associated loss factors) isthen possible to accurately interpret the dynamical behaviourof composite materials and also simplify their implementationin finite element software.A second approach using a corrected finite difference scheme(CFAT method) allows a similar analysis using a coarse mesh,reducing the durations of measurement and post-processing.Finally, a perspective of detection and identification of defects isconsidered. By mean of cartographies of the elastic parameters,it seems possible to infer a signature related to a kind of flaw. Adiscontinuity of the shear modulus would attest the presence ofdelamination while a reduced Young’s modulus could indicate afibre breakage, etc
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Gauliard, Nicolas. "Développement d'un système de génétique inverse pour le virus de la fièvre de la vallée du Rift et analyse du rôle des régions non codantes du génome." Paris 7, 2006. http://www.theses.fr/2006PA077198.
Full textAbstract:
Le virus de la fièvre de la Vallée du Rift (VFVR) est un arbovirus appartenant à la famille des Bunyaviridae, genre Phlebovirus. Présent en Afrique, il est transmis par les moustiques et infecte l'homme et les ruminants. Le génome viral est composé de trois segments d'ARN simple brin de polarité négative: le segmente L code pour une ARN polymérase ARN dépendante, M pour le précurseur des glycoprotéines d'enveloppe et S pour la nucléoprotéine N et la protéine non structurale NSs. Un système de génétique inverse pour le VFVR a été établi en utilisant des protéines produites par des virus de la vaccine recombinants (Lopez et al. 1995). Ce model a démontré que les protéines L et N sont nécessaires et suffisantes pour transcrire un minigénome mimant un ARN S viral contenant le gène rapporteur CAT en orientation antisens flanqué des séquences non codantes du segment S mais l'efficacité de transcription était faible. Nous avons développé un système de minigénome complet basé sur la transfection de plasmides. Les protéines virales sont exprimées par l'ARN polymérase T7. Les minigénomes LCAT, MCAT et SCAT mimant les trois segments viraux L, M et S sont synthétisés par des plasmides sous le contrôle de l'ARN polymérase I cellulaire. Dans ces conditions, les minigénomes sont transcrits et répliqués. La terminaison de la transcription des ARNm est également similaire à celles des ARNm viraux. L'efficacité de transcription du minigénome L est supérieure à celle de S et de M. Nous avons mis en évidence que la force de transcription des promoteurs déterminée avec les minigénomes joue un rôle important dans la régulation du taux de synthèse des ARN viraux dans les cellules infectéesThe Rift Valley fever virus (RVFV) is a phlebovirus of the"BunyaviridaëJarnlly present in Africa and transmitted by mosquitoes and affecting cattle and humans. The viral genome is composed of three segments of RNA of negative polarity: the L segment codes for a RNA polymerase RNA dependent, the M segment for the glycoproteins precursor and the S segment for the nucleoprotein N and the non structural protein NSs. A reverse genetics System for the RVFV was developped using recombinant vaccinia viruses expressing viral proteins (Lopez et al. 1995). This model showed the N and L proteins are necessary and sufficient to transcribe a minigenome mimicking a viral S segment containing the CAT reporter gene in the non coding orientation and flanked by the non coding regions of the S segment. We developed a complete minigenome System for the RVFV based on transfection of plasmids. Viral proteins are expressed under T7 polymerase control. LCAT, MCAT and SCAT minigenomes, mimicking the three viral segments L, M and S, are synthetized with plasmids under the cellular RNA polymerase I control and are transcribed and replicated. The termination of mRNA transcription was also similar to viral one. Transcription efficiency of the LCAT minigenome was stronger than the S one and the M one. We showed that promoters strength determined with this System play an important role in levels of viral RNAs produced during cellular infection
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Washburn, Malissa. "Architecture of the Silurian sedimentary cover sequence in the Cadia porphyry Au-Cu district, NSW, Australia : implications for post-mineral deformation." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/1064.
Full textAbstract:
Alkalic porphyry style Au-Cu deposits of the Cadia district are associated with
Late-Ordovician monzonite intrusions, which were emplaced during the final phase of
Macquarie Arc magmatism at the end of the Benambran Orogeny. N-striking faults,
including the curviplanar, northerly striking, moderately west-dipping basement thrust faults of the Cadiangullong system, developed early in the district history. NE-striking faults formed during rifting in the late Silurian. Subsequent E-W directed Siluro- Devonian extension followed by regional E-W shortening during the Devonian
Tabberabberan Orogeny dismembered these intrusions, thereby superposing different
levels porphyry Au-Cu systems as well as the host stratigraphy.
During the late Silurian, the partially exhumed porphyry systems were buried
beneath the Waugoola Group sedimentary cover sequence, which is generally preserved
in the footwall of the Cadiangullong thrust fault system. The Waugoola Group is a
typical rift-sag sequence, deposited initially in local fault-bounded basins which then transitioned to a gradually shallowing marine environment as local topography was
overwhelmed. Basin geometry was controlled by pre-existing basement structures, which
were subsequently inverted during the Devonian Tabberabberan Orogeny, offsetting the unconformity by up to 300m vertically. In the Waugoola Group cover, this shortening
was accommodated via a complex network of minor detachments that strike parallel to
major underlying basement faults. For this reason, faults and folds measured at the
surface in the sedimentary cover can be used as a predictive tool to infer basement
structures at depth.
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Salel, Jean-François. "Tectonique de chevauchement et inversion dans la chaîne des Plamyrides et le graben de l'Euphrate (Syrie) : conséquence sur l'évolution de la plaque arabe." Montpellier 2, 1993. http://www.theses.fr/1993MON20100.
Full textAbstract:
Cette analyse structurale de la chaine des palmyrides et du graben de l'euphrate (syrie) est basee sur des observations de terrain associees a des donnees sismiques et gravimetriques. Les problemes tectoniques sont abordes a l'aide des methodes des coupes equilibrees et restaurees. Cette etude met en evidence une phase de compression d'age cretace terminal a eocene responsable de l'inversion des paleo-grabens des palmyrides et de l'euphrate. (1) la structure des palmyrides resulte du decollement de toute la couverture sedimentaire depuis la suture anatolie/arabie au nord, jusque dans les palmyrides frontales au sud. Ce decollement se situe dans les series cambriennes sous le plateau d'alep et se propage dans les series triasiques par l'intermediaire d'une rampe dans le paleozoique, localisee sous les palmyrides centrales. Le niveau de decollement emerge dans les palmyrides frontales, ou se forment des structures chevauchantes vers le sud, de style duplex ou chevauchements imbriques. Le raccourcissement de la couverture sedimentaire est estime a 20 km. L'observation des deformations syn-sedimentaires (discordances progressives) au front des structures chevauchantes des palmyrides frontales, demontre que la compression majeure s'effectue des la fin du cretace et pendant le paleogene et correspond a une tectonique d'inversion ou les rampes reutilisent des paleo-failles normales d'age triasique. (2) dans le secteur du graben de l'euphrate, l'inversion n'affecte que la bordure nord du graben ou les failles normales d'age cretace superieur sont reactivees en decrochement. L'etude microtectonique du nord-ouest de la plaque arabe montre une rotation horaire de la contrainte majeure horizontale de plus de 70, depuis la direction n110 (cretace superieur) jusqu'a la direction nord-sud (plio-quaternaire). Cette etude propose un modele regional, dans lequel la tectonique de decollement observee dans les palmyrides est directement reliee a l'obduction de la croute oceanique sur la bordure nw de la plaque arabe, a la fin du cretace. Ce modele est different de celui generalement admis, ou la tectonique des palmyrides est interpretee comme le resultat de l'amortissement du mouvement de la plaque arabe vers le nord associe a l'ouverture de la mer rouge au cours du mio-plio-quaternaire
Book chapters on the topic "Inversió de rift"
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"Generalizing RIFs." In Attribute Grammar Inversion and Source-to-source Translation, 62–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/3-540-19072-4_4.
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"Tectonic Inversion in East Africa." In Geoscience of Rift Systems—Evolution of East Africa, 193–210. American Association of Petroleum Geologists, 1999. http://dx.doi.org/10.1306/st44623c12.
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"The inversion of RIF grammars." In Attribute Grammar Inversion and Source-to-source Translation, 43–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/3-540-19072-4_3.
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Houseknecht, David W., and Christopher D. Connors. "Late Jurassic-Early Cretaceous Inversion of Rift Structures, and Linkage of Petroleum System Elements across Postrift Unconformity, U.S. Chukchi Shelf, Arctic Alaska." In Petroleum Systems in "Rift" Basins, 724–43. Gulf Coast Section SEPM, 2015. http://dx.doi.org/10.5724/gcs.15.34.0724.
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"Grammar based translation methodologies and RIFs." In Attribute Grammar Inversion and Source-to-source Translation, 20–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/3-540-19072-4_2.
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"Structural Inversion of a Cretaceous Rift Basin, Southern Altiplano, Bolivia." In Petroleum Basins of South America. American Association of Petroleum Geologists, 1995. http://dx.doi.org/10.1306/m62593c14.
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Graciansky, Pierre-Charles De, David G. Roberts, and Pierre Tricart. "Birth of the Western and Central Alps: Structural Inversion and the Onset of Orogenesis." In The Western Alps, from Rift to Passive Margin to Orogenic Belt, 269–88. Elsevier, 2011. http://dx.doi.org/10.1016/s0928-2025(11)14013-4.
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"The Gudrun Field: Gravity-Flow Deposition during Rifting and Inversion." In Rift-Related Coarse-Grained Submarine Fan Reservoirs; the Brae Play, South Viking Graben, North Sea, 387–422. The American Association of Petroleum Geologists, 2018. http://dx.doi.org/10.1306/13652188m1153814.
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"6. Estimates of Eroded Strata Using Borehole Vitrinite Reflectance Data, Triassic Taylorsville Rift Basin, Virginia: Implications for Duration of Synrift Sedimentation and Evidence of Structural Inversion." In The Great Rift Valleys of Pangea in Eastern North America, 80–103. Columbia University Press, 2003. http://dx.doi.org/10.7312/leto11162-005.
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BALDWIN, S., N. WHITE, and R. D. MÜLLER. "Resolving multiple rift phases by strain-rate inversion in the Petrel Sub-basin, northwest Australia." In Evolution and Dynamics of the Australian Plate. Geological Society of America, 2003. http://dx.doi.org/10.1130/0-8137-2372-8.245.
Full textConference papers on the topic "Inversió de rift"
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Dooley, Tim P., and Michael R. Hudec. "EXTENSION AND INVERSION OF SALT-BEARING RIFT SYSTEMS." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-338651.
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T. Penfield, G., and J. Kratochwill. "Pre-salt rift structures of gabon - appraisal by aerogravity and 3D depth inversion." In 55th EAEG Meeting. European Association of Geoscientists & Engineers, 1993. http://dx.doi.org/10.3997/2214-4609.201411576.
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Lohr, T. "Rift Transection, Inversion and Punctuated Subsidence - Tectonic Development of the North Falkland Basin." In 79th EAGE Conference and Exhibition 2017. Netherlands: EAGE Publications BV, 2017. http://dx.doi.org/10.3997/2214-4609.201700855.
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Mahgoub, Mohamed Ibrahim, and Eswaran Padmanabhan. "Enhancing the Interpretation of Rift Structures in Sudan Using AVO Analysis and Seismic Inversion." In International Petroleum Technology Conference. International Petroleum Technology Conference, 2011. http://dx.doi.org/10.2523/iptc-14327-ms.
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Abolins, Mark, and Will Levandowski. "UPLIFT OF THE NASHVILLE DOME, CENTRAL TENNESSEE BY INVERSION OF THE PREVIOUSLY-UNDESCRIBED NASHVILLE RIFT." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-307585.
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Murray, Kendra E., Nathan A. Niemi, Nathan A. Niemi, Marin K. Clark, and Marin K. Clark. "THERMOCHRONOLOGY LINKS GROWTH OF THE ROCKY MOUNTAIN FRONT RANGE TO INVERSION OF A NEOPROTEROZOIC RIFT SYSTEM." In 72nd Annual GSA Rocky Mountain Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020rm-346465.
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Ragheh, R. Robleh, P. Tarits, S. Hautot, and M. Jalludin. "Improving geophysical resolution with magnetotelluric and gravity joint inversion: application to the Asal Rift geothermal region." In First EAGE Workshop on Geothermal Energy and Hydro Power in Africa. European Association of Geoscientists & Engineers, 2020. http://dx.doi.org/10.3997/2214-4609.2020625011.
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Chase, Brandon Franklin, Estella A. Atekwana, Folarin Kolawole, Molly Simpson Turko, Brett M. Carpenter, Rob L. Evans, and Carol Finn. "THE SOUTHERN OKLAHOMA AULACOGEN: NEW INSIGHTS ON THE PALEOZOIC RIFT-RELATED AND INVERSION-RELATED STRUCTURES IN THE WICHITA UPLIFT." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-320049.
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Granath, James, and William Dickson. "Regionally Connected Structural Systems: The Power of the Big (Continental-Scale) Picture." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2571578-ms.
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ABSTRACT Beyond offshore West Africa where modern densely-sampled data from ships and satellites have played a key role in current understanding of passive margin evolution, Africa is in general rather unevenly known, especially in the subsurface in more remote areas. The GIS-based Exploration Fabric of Africa (EFA, the ‘Purdy project’) was designed to address that problem. It includes structural features such as faults and basin outlines but at a very high and often generalized level, divorced from their underlying genetic linkages. We have undertaken to compile a more detailed tectonic synthesis aimed to integrate understanding of the oceanic margins with the continental realm. This is an overlay to EFA with a variety of public domain, published, non-exclusive, and derivatives of proprietary work at a closer and more detailed level, importantly guided by known patterns of structural styles. Potential field (gravity and magnetic) data provide guidance in locating, extending, and connecting key mapped features; we then rely on the kinematic patterns to predict missing details in a testable interpretation. The result is a detailed structural features map that can function as a framework within which to target and prioritize both conventional and unconventional activity by operators and licensing/regulatory organizations. We illustrate the process in theory and in practice along the Central African Rift System (CARS), where data is sparse. This fault linkage systems approach has flagged underexplored areas where unmapped structure is likely that could, for example, be targeted with hi-resolution geophysical data. A similar system to CARS appears to cross southern Africa from Namibia to Tanzania – a “Southern Trans-African Rift system" or STARS. Exploration in the eastern Owambo Basin resulted in the mapping of a pull-apart basin from depth-to-basement inversion of high-resolution magnetic data and subsequently studied with structural modeling. Thinking in terms of such fault and structural systems, this ‘Kavango Basin’ can be related along strike to the Karoo Basins in Eastern Africa via features such as the Omaruru lineament, implying the possibility of a fairway of extensional basins and shears across the continent that are not obvious in existing low-resolution data. STARS represents a blue-sky frontier concept for both conventional and nonconventional exploration potentially offering new exploration leads, the ultimate objective of big picture work.