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Journal articles on the topic 'Tectonique extension'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Tricart, Pierre, Stephane Schwartz, Christian Sue, Gerard Poupeau, and Jean-Marc Lardeaux. "La denudation tectonique de la zone ultradauphinoise et l'inversion du front brianconnais au sud-est du Pelvoux (Alpes occidentales); une dynamique miocene a actuelle." Bulletin de la Société Géologique de France 172, no. 1 (2001): 49–58. http://dx.doi.org/10.2113/172.1.49.

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Abstract In the western Alps, to the southeast of the Pelvoux massif (Champsaur-Embrunais-Brianconnais-Queyras transect), the Brianconnais zone consists of the southern tip of the Zone Houillere and small nappes of Mesozoic sediments, emplaced during the Eocene in HP-LT metamorphic conditions. During the Oligocene this tectonic pile was thrusted onto a late Eocene to early Oligocene flexural basin, deformed in low grade metamorphic conditions and belonging to the Ultradauphine zone. This major thrust, called here CBF [Chevauchement Brianconnais Frontal: Tricart 1986] represents the boundary be

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2

Bousquet, Jean-Claude, and Gianni Lanzafame. "Nouvelle interpretation des fractures des eruptions laterales de l'Etna; consequences pour son cadre tectonique." Bulletin de la Société Géologique de France 172, no. 4 (2001): 455–67. http://dx.doi.org/10.2113/172.4.455.

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Abstract Mt Etna is cut by numerous fractures (fissures and faults) of very different origin and orientation. They have been used to define the activity and the tectonic setting of the volcano. After a discussion of the proposed tectonic models for Etna, an examination of the fractures, which are linked to the high flank eruptions, was carried out based on the geological and geophysical studies of the recent eruptions (1983, 1989, 1991-93). All of these surface breaks are of strictly volcanic origin; they open and advance very slowly, in relation to the propagation of the dyke, as well as its

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3

Gilson, Natacha. "« Tectonique des plaques monétaires » : création et extension de zones monétaires au sein du système monétaire international." Reflets et perspectives de la vie économique XLIX, no. 4 (2010): 7. http://dx.doi.org/10.3917/rpve.494.0007.

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4

Boutib, Lahcen, Fetheddine Melki, and Fouad Zargouni. "Tectonique synsedimentaire d'age cretace superieur en Tunisie nord orientale; blocs bascules et reorganisation des aires de subsidence." Bulletin de la Société Géologique de France 171, no. 4 (2000): 431–40. http://dx.doi.org/10.2113/171.4.431.

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Abstract Structural analysis of late Cretaceous sequences from the northeastern Tunisian Atlas, led to conclude on an active basin floor instability. Regional tectonics resulted in tilted blocks with a subsidence reorganization, since the Campanian time. These structural movements are controlled both by N140 and N100-120 trending faults. The Turonian-Coniacian and Santonian sequences display lateral thickness and facies variation, due to tectonic activity at that time. During Campanian-Maastrichtian, a reorganization of the main subsidence areas occurred, the early Senonian basins, have been s

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5

Thomas, William A. "A Mechanism for Tectonic Inheritance at Transform Faults of the Iapetan Margin of Laurentia." Geoscience Canada 41, no. 3 (2014): 321. http://dx.doi.org/10.12789/geocanj.2014.41.048.

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Transform faults along the Iapetan rifted continental margin of Laurentia offset the continental rift and/or bound domains of oppositely dipping low-angle detachments. Rift-parallel and transform-parallel intracratonic fault systems extend into continental crust inboard from the rifted margin. Ages of synrift igneous rocks, ranging from 765 to 530 Ma, document non-systematic diachroneity of rifting along the Iapetan margin. Synrift sedimentary accumulations show abrupt variations in thickness across transform faults, and some concentrations of synrift igneous rocks are distributed along transf

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6

Chorowicz, J., A. Emran, and E. M. Alem. "Tectonique et venues volcaniques en contexte de collision, exemple du massif néogène du Siroua (Atlas Marocain) : effets combinés d'une transformante et de la suture panafricaine." Canadian Journal of Earth Sciences 38, no. 3 (2001): 411–25. http://dx.doi.org/10.1139/e00-074.

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The Late Miocene Early Pliocene Siroua strato-volcano is made of particular hyperalkaline rocks. It lies between the High-Atlas and the Anti-Atlas, in a collisional zone related to the continental subduction of the African plate under the Moroccan Meseta. Our field observations and analyses of SPOT, Landsat-MSS, and DEM (digital elevation model) imagery have permitted mapping of faults, joints, and volcanic edifices. The elongate shape of volcanoes and linear clusters of adjacent edifices, together with their relationships with faults, show that magma ascent was favored by tectonic crustal s

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7

Bellier, O., P. Vergely, J. L. Mercier, et al. "Analyse tectonique et sedimentaire dans les monts Li Shan (province du Shaanxi, Chine du nord); datation des regimes tectoniques extensifs dans le graben de la Wei He." Bulletin de la Société Géologique de France 162, no. 1 (1991): 101–12. http://dx.doi.org/10.2113/gssgfbull.162.1.101.

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8

Aghzer, Abdel M., and Ricardo Arenas. "Détachements et tectonique extensive dans le massif hercynien des Rehamna (Maroc)." Journal of African Earth Sciences 21, no. 3 (1995): 383–93. http://dx.doi.org/10.1016/0899-5362(95)00096-c.

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9

Ouarhache, Driss, André Charriere, Françoise Chalot-prat, and Mohamed EL Wartiti. "Triassic to early Liassic continental rifting chronology and process at the southwest margin of the Alpine Tethys (Middle Atlas and High Moulouya, Morocco); correlations with the Atlantic rifting, synchronous and diachronous." Bulletin de la Société Géologique de France 183, no. 3 (2012): 233–49. http://dx.doi.org/10.2113/gssgfbull.183.3.233.

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AbstractApparu à l’est du rift continental atlantique, un rift continental téthysien s’est développé sur le domaine atlasique du Maroc au cours du Trias et du début du Jurassique. Dans le transect étudié du Moyen Atlas et de la Haute Moulouya (MAHM), ce début du rifting téthysien, le « rifting initial », comporta 3 étapes majeures.Au Trias supérieur, apparut une première génération de bassins syn-rift (sr1) continentaux et détritiques, associés au rejeu extensif de certaines sutures hercyniennes ; cette phase se poursuivit avec une transgression laguno-marine généralisée dans un stade post-rif

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10

Reymer, Arthur P. S. "The origin and microstructures of metamorphic felsic dykes emplaced during brittle-ductile extension (southeast Sinai)." Geological Magazine 122, no. 1 (1985): 27–38. http://dx.doi.org/10.1017/s0016756800034051.

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AbstractStructural, petrographic and chemical analyses of a set of northeast-trending quartzofeld-spathic dykes in Wadi Kid area (southeastern Sinai) show that they are the product of anatexis of pelitic rocks. Metamorphic P-T data indicate that anatexis could have occurred only 2 km below the present erosion level. The partial melts intruded into overlying rocks during regional metamorphism along a set of northeast-oriented extensional fractures, thereby recrystallizing and in some cases obtaining tectonite fabrics. The fractures were formed perpendicular to the regional mineral lineation and

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11

Schoonmaker, Adam, William S. F. Kidd, and Tristan Ashcroft. "Magmatism and Extension in the Foreland and Near-Trench Region of Collisional and Convergent Tectonic Systems." Geoscience Canada 43, no. 3 (2016): 159. http://dx.doi.org/10.12789/geocanj.2016.43.100.

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Foreland magmatism occurs in the lower plate during arc–continent or continent–continent collision, although it is uncommon. Ancient examples are recognized by a stratigraphic section into which mafic lavas and/or shallow sills are emplaced at a level at the top of a passive margin cover sequence, or within the overlying deeper water deposits that include mudrocks and flysch-type turbidites. Extensional structures associated with the emplacement of the volcanic rocks may develop slightly prior to or contemporaneous with the arrival of the approaching thrust front. We have selected twelve examp

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12

Hughes, Cameron A., Micah J. Jessup, Colin A. Shaw, and Dennis L. Newell. "Deformation conditions during syn-convergent extension along the Cordillera Blanca shear zone, Peru." Geosphere 15, no. 4 (2019): 1342–67. http://dx.doi.org/10.1130/ges02040.1.

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AbstractStrain localization across the brittle-ductile transition is a fundamental process in accommodating tectonic movement in the mid-crust. The tectonically active Cordillera Blanca shear zone (CBSZ), a ∼200-km-long normal-sense shear zone situated within the footwall of a discrete syn-convergent extensional fault in the Peruvian Andes, is an excellent field laboratory to explore this transition. Field and microscopic observations indicate consistent top-down-to-the-southwest sense of shear and a sequence of tectonites ranging from undeformed granodiorite through mylonite and ultimately fa

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13

Djarar, Lilya, Hua Wang, Michel Guiraud, et al. "Le bassin stéphanien des Cévennes (Massif Central) : un exemple de relation entre sédimentation et tectonique extensive tardi-orogénique dans la chaîne varisque." Geodinamica Acta 9, no. 5 (1996): 193–221. http://dx.doi.org/10.1080/09853111.1996.11105286.

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14

Roig, Jean-Yves, and Michel Faure. "La tectonique cisaillante polyphasee du Sud Limousin (Massif central francais) et son interpretation dans un modele d'evolution polycyclique de la chaine hercynienne." Bulletin de la Société Géologique de France 171, no. 3 (2000): 295–307. http://dx.doi.org/10.2113/171.3.295.

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Abstract Structural, kinematics and thermo-barometric analyses of the ductile deformation of the south-Limousin metamorphic formations show a polyphase shear tectonics corresponding to two different thrusting events. The older one, is a to the top-to-the-SW thrusting during middle Devonian. This deformation occurs under minimum PT conditions of 7 Kbar/700 degrees C simultaneously to anatexis. The second event is a top-to-the-NW shearing which occurred in late Devonian-early Carboniferous under Barrovian conditions (5 kbar/600 degrees C). Diorites bodies and non-eclogitized mafic rocks allow us

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15

Nikolov, Todor, Bernard Peybernès, Richard Ciszak, and Marin Ivanov. "Enregistrement sédimentaire de la tectonique extensive et de l'eustatisme dans le Jurassique terminal et le Crétacé basal du Prébalkan central et oriental (Bulgarie)." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 326, no. 1 (1998): 43–49. http://dx.doi.org/10.1016/s1251-8050(97)83202-8.

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16

Everaerts, Michel, and Jean-Louis Mansy. "Le filtrage des anomalies gravimetriques; une cle pour la comprehension des structures tectoniques du Boulonnais et de l'Artois (France)." Bulletin de la Société Géologique de France 172, no. 3 (2001): 267–74. http://dx.doi.org/10.2113/172.3.267.

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Abstract The geology of the Boulonnais has been well studied since the early part of the last century [Gosselet and Bertaut, 1873; Olry, 1904; Pruvost and Delepine, 1921]. Extensive coal exploration added substantially to the general understanding of the geology of the region but as outcrop is poor, many questions remain. Gravity methods used in the analysis of geological structures have had a long and successful history in helping to study the earth's crust for scientific and applied objectives. Regional gravity data are particularly useful in mapping geographic distribution and configuration

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17

YiTian, WANG, YE HuiShou, LIU JunChen, et al. "Extensional tectonic setting of the Triassic metallogenic event in the Xiaoqinling goldfield: Evidence from ⁴⁰Ar-³⁹Ar chronology of the tectonite." Acta Petrologica Sinica 37, no. 8 (2021): 2419–30. http://dx.doi.org/10.18654/1000-0569/2021.08.10.

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18

Oudra, M., H. Beraaouz, M. Ikenne, D. Gasquet, and A. Soulaimani. Estudios Geológicos 61, no. 3-6 (2005). http://dx.doi.org/10.3989/egeol.05613-658.

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19

Konstantinovskaya, Elena, Gennady Ivanov, Jean-Louis Feybesse, and Jean-Luc Lescuyer. "Structural Features of the Central Labrador Trough: A Model for Strain Partitioning, Differential Exhumation and Late Normal Faulting in a Thrust Wedge under Oblique Shortening." Geoscience Canada, March 29, 2019, 5–30. http://dx.doi.org/10.12789/geocanj.2019.46.143.

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The west-verging fold and thrust belt of the Central Labrador Trough originated as a part of the New Quebec Orogen from rift inversion as a result of oblique collision and dextral transpression between the Archean Superior craton and the Archean block of the Core Zone during the Trans-Hudson orogeny (1.82−1.77 Ga). The structures associated with dextral transpression are well established in the northern segment of the orogen but not in the central part. We present new field structural observations along the ca. 70 km long W−E Minowean-Romanet transect that include not only elements of thrust t

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