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Dissertations / Theses on the topic 'Plate tectonic'

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Published: 4 June 2021
Last updated: 4 March 2023

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1

Anderson, Phillip. "THE PROTEROZOIC TECTONIC EVOLUTION OF ARIZONA (PRECAMBRIAN, PLATE TECTONICS, VOLCANIC, STRATIGRAPHY)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183853.

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Archean tectonics are irreconcilable with modern plate tectonics without clearly understanding Proterozoic tectonic accretionary prosesses. Arizona best displays a convergent margin where Proterozoic accretion to an Archean craton generated a new Proterozoic crust from 1800 to 160 Ma. This 12 year study independently formulated a definitive understanding of Arizona's Proterozoic tectonic evolution with new lithologic, petrologic, geochemical, structural and relative age data, and extensive new mapping. The Northwest Gneiss Belt contains an early Proterozoic arkosic clastic wedge at the Wyoming Archean edge, but only intraoceanic elements--Antler-Valentine and Bagdad volcanic belts--on Proterozoic oceanic crust south of the wedge. The Central Volcanic Belt evolved diachronously on oceanic crust: 1800-1750 Ma formative volcanism (Bradshaw Mountain, Mayer, Ash Creek and Black Canyon Creek Groups) stepped SE to form the Prescott-Jerome island arc above a SE-dipping subduction zone; a 1740 Ma NW subduction flip accreted the arc to the Archean craton, evolved I-type plutons of NW alkali-enrichment opposit to arc tholeiites, and formed calc-alkaline Union Hills Group volcanics at the southeast arc front. Except for hiatal Alder Group deposition in structural troughs, the central magmatic arc emerged as the trench stepped southeastward across SE Arizona with flattening of subduction, growth of the Pinal Schist fore-arc basin, 1700 Ma accretion of the Dos Cabenzas arc to the margin, eruption of felsic ignimbrite fans across the central arc front, and Mazatzal Group shallow marine sedimentation across the emergent arc. Proterozoic plate tectonics were subtly different from modern plate tectonics, producing oceanic crust, island arcs and other features very different in detail from modern and Archean analogs. The Proterozoic Plate Tectonic Style warrants clear distinction from those of other eras. This study establishes for Arizona an extensive, accurate and new Proterozoic data base, for central Arizona a detailed relative chronology surpassing isotopic resolution, and a new formal stratigraphic framework to be the foundation for future studies. This dissertation is superceded by a new book on Arizona's Proterozoic Tectonic Evolution, published by the Precambrian Research Institute, 810 Owens Lane, Payson, Arizona, 85541.
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2

Lavallee, D. A. "Tectonic plate motions from global GPS measurements." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324800.

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3

Keller, William R. Heaton Thomas H. "Cenozoic plate tectonic reconstructions and plate boundary processes in the Southwest Pacific /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-01102005-223039.

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4

Gibbons, Ana D. "Regional plate tectonic reconstructions of the Indian Ocean." Thesis, The University of Sydney, 2012. http://hdl.handle.net/2123/8580.

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This thesis outlines and tackles the major outstanding issues of early Indian Ocean plate tectonic reconstructions using recent advancements in data and technology. The first chapter is focussed on the original extent of Greater India, using information from the abyssal plains offshore West Australia to incorporate tectonic boundaries that include several major submarine plateaus. In this chapter we also describe the methods employed to construct our plate kinematic models. The second chapter investigates the seafloor off East Antarctica, relating it to the conjugate seafloor off East India, where there are several anomalous tectonic features, with disputed origins. This chapter also solves the enigmatic, curved fracture zones located several kilometres off West Australia and East Antarctica, and predicts a diachronous separation between Madagascar and India. The final chapter investigates the implications of the plate reconstruction model further afield, matching the accretions of Greater India, Argoland and various Tethyan oceanic arcs, to the geological evidence in the Eurasia and Southeast Asian margins.
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5

Doe, Michael Frederick. "Reassessment of Paleo- and Mesoproterozoic basin sediments of Arizona| Implications for tectonic growth of southern Laurentia and global tectonic configurations." Thesis, Colorado School of Mines, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3622903.

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<p> Proterozoic crustal provinces that underlie much of the United States record prolonged southward growth of the North American craton (Laurentia) between ca. 1.8 and 1.0 Ga. Exposures throughout central Arizona's Tonto Basin represent multiple generations of sedimentary basins formed during Proterozoic accretion. Metasedimentary rocks sampled across Tonto Basin resulted have identified remnants of a previously undated but potentially widespread Mesoproterozoic basin called the Yankee Joe Basin. Sediments of Yankee Joe Basin are particularly interesting because they have depositional age's ca. 200 m.y. younger than previously thought and because they are rich in detrital zircons with ages between 1.6-1.48 Ga, a time period not widely represented in the igneous record of Laurentia. Metasedimentary rocks with similar age and provenance are found in northern New Mexico and in the lower parts of the Belt Supergroup in northern Idaho, Montana, and Canada. Zircon ages and Hf isotopic characteristics suggest the distinctive 1.6-1.48 Ga grains might have been derived from non-Laurentian sources, most likely one or more formerly adjacent cratons such as north Australia. Circa 1.48-1.43 Ga units in the Yankee Joe Basin rest disconformably on Paleoproterozoic quartzite, and all were deformed together during northwest-directed foreland-style thrusting. This event was previously interpreted to represent the ca. 1.66-1.60 Ga Mazatzal orogeny. However, new findings challenge this view and suggest a major deformation event occurred ca. 1.47-1.45 Ga, possibly representing the Picuris orogeny as recently described in northern New Mexico. Regional thrust faulting during the Mesoproterozoic might have unroofed and removed significant portions of the Yankee Joe section, potentially shedding detritus north from the thrust front into the upper parts of the Belt-Purcell basin. </p><p> Detrital zircon ages and hafnium isotope compositions provide a critical test of sediment provenance and depositional age and were used to reassess sedimentary age and sources multiple Proterozoic unconformity-bound metasedimentary successions exposed across Arizona. These successions represent a series of ca. 1.75 to 1.3 Ga basins that span the Proterozoic accretionary provinces of southwestern Laurentia, representing key elements in the tectonic evolution of the continental margin. The ca. 1.75 Ga Vishnu Schist contains a bimodal detrital zircon age distribution with prominent Archean (2.5 Ga) and Early Paleoproterozoic (1.8 Ga) populations and minor juvenile 1.75 Ga input. The predominance of 3.3-1.8 Ga detrital zircon ages and initial epsilon Hf (&epsiv;Hf) values of +4 to -13 in both detrital grains of the Vishnu Schist and xenocrystic grains in plutons from cross-cutting plutons suggests the Vishnu Schist was derived primarily from recycling of the Mojave and other older basement provinces, possibly including one or more outboard cratons. In contrast, the ca. 1.74-1.72 Ga Jerome and ca. 1.72 Ga Alder successions of central Arizona, show a marked shift to strongly unimodal detrital zircon age distributions with initial &epsiv;Hf values ranging from +13 to -5, generally more positive and near-juvenile. Cross-cutting ca. 1.74-1.72 Ga plutons that intrude these rocks also have largely juvenile Hf isotopic signatures. The prominent ca. 1.73 Ga age peaks and relatively juvenile &epsiv;Hf values of detrital grains and plutons are consistent with first-cycle sediment derived from local arc systems formed during progressive assembly of the Yavapai province with the older Mojave province. The ca.1.66-1.63 Ga Mazatzal succession is more compositionally mature and contains broader unimodal detrital zircon age spectra, interpreted to represent increasing regional crustal recycling following the culmination of the Yavapai orogeny. </p><p> In the northern Tonto Basin, detrital zircon age populations from similar looking quartzite and shale successions were used to develop new regional correlations. First, the Houdon Quartzite of the Alder Group was correlated to the Pine Creek Conglomerate. Second, the Mazatzal Group that unconformably overlies the Alder Group, was found to be deposited ca. 1631 &plusmn; 22 Ma, consistent with the White Ledges Formation and the quartzite succession at Four Peaks. Third, a new detrial zircon population collected from the upper part of the argillaceous section in the core of the Four Peaks synform yield ages between 1591-1560 Ma suggesting this section is correlative to the Yankee Joe Formation. (Abstract shortened by UMI.)</p>
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6

Miliorizos, Marios. "Tectonic evolution of the Bristol Channel Borderlands." Thesis, Cardiff University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360602.

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7

Queano, Karlo Lagera. "Tectonic modeling of Northern Luzon, Philippines and regional implications." Thesis, Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36399668.

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8

Viso, Richard. "Mid-Cretaceous tectonic evolution of the Pacific-Phoenix-Farallon triple junction /." View online ; access limited to URI, 2005. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3186926.

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9

Awan, Mohammad Aslam. "The tectonic history of the Berwyn Hills, North Wales." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335703.

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10

Hunter, Morag. "The tectonic setting of the Belingwe Greenstone Belt, Zimbabwe." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245104.

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11

Awdal, Abdullah H. "An investigation of fracture patterns in different tectonic settings." Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=225828.

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12

Ishutov, Sergey. "Tectonic characterization of the THUMS-Huntington Beach fault, offshore southern California." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1591600.

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<p>The THUMS-Huntington Beach fault branches from the Palos Verdes fault zone and south of that point forms the southwestern border of the Wilmington and Huntington Beach anticlines. Wilmington and Huntington Beach oil fields are located nearby, with timing and trapping mechanisms closely related to the evolution of the California Continental Borderland. The T-HBF, being part of Inner Borderland, is associated with change in vector of regional stress. Previously, this fault has been interpreted as a discontinuous feature. Correlation of newly acquired 2-D and existing industry 2-D and 3-D seismic and well data made it possible to identify that this is a right-slip fault zone with three segments. The T-HBF is striking northwest and has an average dip of 75&deg; to the northeast. Wilmington and Huntington Beach anticlines are inverted basins formed as structural lows and then uplifted as a result of T-HBF activity in late Miocene-early Pliocene time. </p>
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13

Houghton, Jacqueline Jane. "Tectonic analysis of parts of the Outer Carpathians, Eastern Europe." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309136.

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14

Ibrahim, Sherif El Sayed. "Tectonic evolution of the El-Shush/Umm Gheig area (Egypt)." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338848.

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15

MacLeod, Christopher John. "The tectonic evolution of the Eastern Limassol Forest Complex, Cyprus." Thesis, Open University, 1988. http://oro.open.ac.uk/57257/.

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The Eastern Limassol Forest Complex (ELFC) lies at the southern margin of the Troodos ophiolite, Cyprus, and preserves a Penrose-type stratigraphy with a 4km-thick crustal sequence. The ELFC is separated from the main part of the Troodos Massif by an east-west trending fault zone, the Arakapas Fault Belt, which earlier studies suggest formed the northern wall of an oceanic transform fault. Transform-related structures are identifiable in the northern part of the ELFC, and volcaniclastic turbiditic sediments intercalated with lava flows attest to the existence of a bathymetric depression coincident with the fault zone. A southern boundary to the transform fault zone is recognised within the ELFC, with the abrupt disappearance of interlava sediments and E-W trending structures. Crust to the south of the boundary was generated at an 'Anti-Troodos' ridge axis. A width of c.5km is implied for the transform. The accretionary geometry of the ELFC has been extensively modified by postvolcanic tectonism. Sustained extension oblique to the trend of the transform has resulted in the reactivation of transform-related structures as normal faults, which have been rotated 'falling domino' style, together with the greater part of the axis sequence crust, above a decollement horizon located near to the petrological Moho. Extensional strain was preferentially accommodated in the transform-tectonised north of the ELFC. In the south, NW-striking normal faults are more steeply dipping, and block tilting is less extreme. Mesostructural data suggest that these normal faults have been reactivated as oblique dextral strike-slip faults and, with subsidiary NE-trending structures, are responsible for clockwise block rotations about steeply plunging axes. The timing of the deformation is constrained with respect to the overlying pelagic sediments, which suggest that the extension continued from the Turonian (i.e. almost immediately after ophiolite formation) to the late Campanian, and that the strike-slip reactivation occurred in late Campanian to early Maastrictian times. Palaeomagnetic studies have shown that Cyprus experienced a 90· anticlockwise rotation, which commenced in the Campanian-Maastrichtian interval, and it is argued that the late dextral strike-slip movements in the southern ELFC reflect deformation close to the margin of the rotating Cyprus microplate. The extensional reactivation of the transform in the Turonian-Campanian may correspond to an anticlockwise torque applied to the Troodos ocean floor prior to actual rotation. The rotation of Cyprus is thought to have been a consequence of the collision of the Arabian continental promontory to the east with an intra-oceanic subduction zone (above which Troodos was created) in the Upper Cretaceous.
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16

Pindell, James Lawrence. "Plate-tectonic evolution of the Gulf of Mexico and Caribbean region." Thesis, Durham University, 1985. http://etheses.dur.ac.uk/7042/.

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A geologic-kinematic model for the evolution of the Gulf of Mexico and Caribbean region is built within a framework provided by a detailed Late Paleozoic (Alleghenian) plate reconstruction and a revised North American (NOAM) and South American (SOAM) relative motion history. From the Middle Jurassic to the Campanian, SOAM migrated east-southeast from NOAM. From the Carapanian to the Eocene. Little or no NOAM-SOAM relative motion occurred, although minor sinistral transpression is suggested. Since the Eocene, minor west-northwest convergence between NOAM and SOAM has occurred along pre-existing fracture zones. Three stages of evolution are recognized which correlate with these phases of relative motion. Stage 1: mainly carbonate shelves fringed the Gulf of Mexico and "Proto-Caribbean" passive rifted margins, during plate separation. Stage 2: the Caribbean Plate (CARIB) progressively entered the NOAM-SOAM gap from the Pacific by subduction of Proto-Caribbean crust beneath the Greater Antilles, Stage 3: CARIB migrated east by 1200 km, subducting Proto-Caribbean crust and forming the Lesser Antilles Arc, Transform faults have dissected the original Greater Antilles Arc, and nappes in the Venezuelan Andes have been emplaced southeastwards onto the northern SOAM margin, diachronously from west to east. Field work done in Dominican Republic, both near Puerto Plata and in the southwest sector, indicates that 1) Cuba and northern and central Hispaniola are parts of one original Greater Antilles arc, 2) this arc collided with the Bahamas in the Late Paleocene=Mid Eocene, and 3) Hispaniola has been assembled by strike-slip juxtaposition of terranes from the west.
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17

Centeno-García, Elena. "Tectonic evolution of the Guerrero terrane, western Mexico." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186665.

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The Guerrero terrane of western Mexico is characterized by an Upper Jurassic-Lower Cretaceous volcanic-sedimentary sequence of arc affinity. The arc assemblage rests unconformably on partially metamorphosed rocks of possible Triassic-Jurassic age. These "basement units," the Arteaga and Placeres Complexes and the Zacatecas Formation, are composed of deformed turbidites, basalts, volcanic-derived graywackes, and blocks of chert and limestone. Sandstones from the basement units are mostly quartzitic and have a recycled orogen-subduction complex provenance. They have negative ᵋNdi (-5 to -7), model Nd ages of 1.3 Ga., and enrichment in light REE, indicating that they were supplied from an evolved continental crust. The volcanic graywackes are derived from juvenile sources (depleted in LREE and ᵋNd = +6), though they represent a small volume of sediments. Primary sources for these turbidites might be the Grenville belt or NW South America. Basement rocks in western North America are not suitable sources because they are more isotopically evolved. Igneous rocks from the basement units are of MORB affinity (depleted LREE and ᵋNdi = +10 to +6). The Jurassic(?)-Cretaceous arc volcanic rocks have ᵋNdi (+7.9 to +3.9) and REE patterns similar to those of evolved intraoceanic island arcs. Sandstones related to the arc assemblage are predominantly volcaniclastic. These sediments have positive ᵋNdi values (+3 to +6) and REE with IAV-affinity. The Guerrero terrane seems to be characterized by two major tectonic assemblages. The Triassic-Middle Jurassic "basement assemblage" that corresponds to an ocean-floor assemblage with sediments derived from continental sources, and the Late Jurassic-Cretaceous arc assemblage formed in an oceanic island arc setting. During the Laramide orogeny the arc was placed against nuclear Mexico. Then, the polarity of the sedimentation changed from westward to eastward, and sediments derived from the arc-assemblage flooded nuclear Mexico. This process marks the "continentalization" of the Guerrero terrane, which on average represents a large addition of juvenile crust to the western North American Cordillera during Mesozoic time.
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18

Williams, Helen Myfanwy. "Magmatic and tectonic evolution of Southern Tibet and the Himalaya." Thesis, [n.p.], 2000. http://library7.open.ac.uk/abstracts/page.php?thesisid=58.

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19

Gibson, Roger Lawrence. "The tectonic and thermal evolution of the Canigou Massif, Eastern Pyrenees." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316777.

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20

Tetley, Michael Grant. "Constraining Earth’s plate tectonic evolution through data mining and knowledge discovery." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/18737.

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Global reconstructions are reasonably well understood to ~200 Ma. However, two first-order uncertainties remain unresolved in their development: firstly, the critical dependency on a self-consistent global reference frame; and secondly, the fundamental difficulty in objectively predicting the location and type of tectonic paleo-boundaries. In this thesis I present three new studies directly addressing these fundamental geoscientific questions. Through the joint evaluation of global seafloor hotspot track observations (for times younger than 80 Ma), first-order geodynamic estimates of global net lithospheric rotation (NLR), and parameter estimation for paleo-trench migration (TM) behaviours, the first chapter presents a suite of new geodynamically consistent, data-optimised global absolute reference frames spanning from 220 Ma through to present-day. In the second chapter, using an updated paleomagnetic pole compilation to contain age uncertainties, I identify the optimal APWP pole configuration for 16 major cratonic blocks minimising both plate velocity and velocity gradients characteristic of eccentric changes in predicted plate motions, producing a new global reference frame for the Phanerozoic consistent with physical geodynamic principles. In the final chapter of my thesis I identify paleo-tectonic environments on Earth through a machine learning approach using global geochemical data, deriving a set of first-order discriminatory tectonic environment models for mid-ocean ridge (MOR), subduction (ARC), and oceanic hotspot (OIB) environments. Key discriminatory geochemical attributes unique to each first-order tectonic environment were identified, enabling a data-rich identification of samples of unknown affinity. Applying these models to Neoproterozoic data, 56 first-order tectonic paleo-boundaries associated with Rodinia supercontinent amalgamation and dispersal were identified and evaluated against published Neoproterozoic reconstructions.
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21

Charlton, Timothy Richard. "The tectonic evolution of the Kolbano-Timor Trough Accretionary Complex, Timor, Indonesia." Thesis, Royal Holloway, University of London, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390295.

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22

Khalil, Samir Mohamed. "Tectonic evolution of the eastern margin of the Gulf of Suez, Egypt." Thesis, Royal Holloway, University of London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287462.

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23

Ingram, Gary M. "Deformation, emplacement and tectonic inferences : the Great Tonalite Sill, southeast Alaska, U.S.A." Thesis, Durham University, 1992. http://etheses.dur.ac.uk/6134/.

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The unique late Cretaceous to early Tertiary Great Tonalite Sill (GTS) of SE Alaska and British Columbia is a very long (c.1000km) and thin (<25km), orogen- parallel, composite batholith, which may separate two major superterranes in the western Cordillera: the Insular superterrane (including the Alexander and Wrangellia terranes) from the Intermontane superterrane (including the Stikine and Cache Creek terranes).The steeply NE dipping, sheet-like plutons of the Great Tonalite Sill are dominated by NW-SE striking concordant fabrics with steep lineations, which formed within a country rock shear zone of similar dimensions - the Great Tonalite Sill shear zone - prior to the complete crystallization of the calc-alkaline tonalitic magmas. The steep, multiple dyke like nature of this composite body and its emplacement during orogenic contraction, imply that ascent and emplacement have been achieved by dyke wedging mechanisms along the deep reaching, probably crustal scale, shear zone. The remarkable narrowness and yet persistence of the Great Tonalite Sill, is probably the result of petrogenesis associated with a very localised zone of crustal thickening, produced by the associated narrow shear zone extending along the orogen length. Deformation in the Great Tonalite Sill shear zone is dominated by NE-SW directed contraction orthogonal to the orogenic strike associated with a component of NE over SW high angle shear. Such a shear zone of late Cretaceous to early Tertiary age, lying along 800 km of the boundary between the Insular and Intermontane superterranes, strongly implies that it represents the actual boundary between them. That being the case, then terrane accretion during this interval was orthogonal and not obliquely dextral as in some current interpretations of paleomagnetic data. NE side up tilting of mid Cretaceous plutons may therefore be responsible for much of the anomalous palaeomagnetic data determined for these intrusions.
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24

Parish, M. "Tectonic evolution of the Western French Alps around St. Jean de Maurienne." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371553.

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25

Bodur, Omer Faruk. "On the Dynamics of Plate Tilting: An Analytical and Numerical Approach." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/22687.

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The Earth’s topography is dynamically evolving through the vertical motion of tectonic plates. This impacts evolution of sedimentary basins which are the Earth’s billion-year history tablets for sea-level variations, climate change and evolution of species. These sedimentary basins are also major sources for coal, oil, gas and water. To unravel the Earth’s geodynamic history and make better predictions about the Earth’s resources, it is of critical importance to understand how the Earth’s topography responds to the interaction between plates and the underlying mantle. Existing predictions for amplitude of dynamic topography derived from global mantle convection models don’t agree well with dynamic topography amplitudes derived from investigations based on sedimentary basins and ocean bathymetry. In this thesis, it is proposed that at shorter wavelengths (<1,000 km) the predictions for dynamic topography amplitude driven by upper mantle density anomalies can be improved by considering the non-Newtonian rheology of rocks. Furthermore, existing mantle convection models, hitherto, cannot explain the long-wavelength rapid subsidence/uplift of sedimentary basins. This problem is addressed by simple analytical models, and by 2D thermo-mechanical numerical experiments taking into account the progressive mechanical transition between the plate and the underlying mantle. The results indicate that horizontal plate motions are associated with gradients in basal shear stress and normal stress, the latter dominating the plate tilt. A critical finding is that plate tilting is relatively fast with uplift/subsidence rates of about few 100 m Myr-1. The numerical model results also suggest that during plate motion, the trailing edges of the plates are being compressed, which might shed light on the tectonic inversion of passive margins.
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Randall, Karen. "Cenozoic tectonic Rotations in part of the New Zealand Plate Boundry Zone." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490349.

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New Zealand lies on the plate boundary zone between the obliquely converging Australian and Pacific Plates. The aim of this thesis is to study how plate motion has been accommodated in the Marlborough Fault Zone (MFZ), in the northern South Island. This fault system links subduction at the Hikurangi margin to the north with continental transpression on the Alpine Fault to the south.
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Thomas, David William. "Tectonic evolution and kinematics of the Mesozoic Rift System, U.K. northern North Sea." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338697.

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Tomlinson, Kirsty Y. "The geochemistry and tectonic setting of early Precambrian greenstone belts, Northern Ontario, Canada." Thesis, University of Portsmouth, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388557.

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Smith, Martin. "The tectonic evolution of the Cambrian and Ordovician rocks in southern central Snowdonia." Thesis, Aberystwyth University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307562.

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Wang, Baiqiu. "Paleomagnetism of the paleogene linzizong volcanic series, southern Tibet, and its tectonic implications." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41758092.

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Seston, Rosemary. "Tectonic and geochemical studies in palaeozoic rocks from part of the Polish Sudetes, south west of Wroclaw." Thesis, Keele University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301166.

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32

Gluckstadt, Miguel Mora. "Tectonic and sedimentary analysis of the Huercal-Overa region, south east Spain, Betic Cordillera." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336120.

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33

Handayani, Lina. "Seismic tomography constraints on reconstructing the Philippine Sea Plate and its margin." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1497.

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The Philippine Sea Plate has been surrounded by subduction zones throughout Cenozoic time due to the convergence of the Eurasian, Pacific and Indian-Australian plates. Existing Philippine Sea Plate reconstructions have been made based primarily on magnetic lineations produced by seafloor spreading, rock magnetism and geology of the Philippine Sea Plate. This dissertation employs seismic tomography model to constraint the reconstruction of the Philippine Sea Plate. Recent seismic tomography studies show the distribution of high velocity anomalies in the mantle of the Western Pacific, and that they represent subducted slabs. Using these recent tomography data, distribution maps of subducted slabs in the mantle beneath and surrounding the Philippine Sea Plate have been constructed which show that the mantle anomalies can be related to the various subduction zones bounding the Philippine Sea Plate. The high velocity mantle anomalies are clearly coincident with Wadati-Benioff zones in the upper mantle. The lower mantle anomalies, although distributed in the “transition zone” (500-1000 km) as stagnant slabs in some cases, can clearly be mapped as continuations of upper mantle subduction zones. Reconstructing the subduction of the slabs now in the mantle best fits Philippine Sea Plate reconstructions that involve the minimal or simplest rotations. Northward movement of the Philippine Sea Plate, WNW subduction of the Pacific Plate since Eocene time (~50 Ma), and northward subduction of the Indian/Australian Plate along Indonesia best explain the subducted slab mantle anomalies. The origin of the eastern plate boundary was a transform zone that evolved into a subduction zone a few million years before the Pacific Plate changed its movement. In addition, the initiation of this subduction zone might possibly be one of the triggers of the Pacific Plate motion changes. The 90 degree rotation of the Philippine Sea Plate including southward plate subduction at its northern boundary proposed in the reconstruction by Hall (2002) is not supported by seismic tomography evidence for slab distribution in the mantle beneath the Philippine Sea region. A hypothesis of minimal rotation of the Philippine Sea Plate, supported by the seismic tomography, guides the reconstruction model presented.
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34

McCarron, Joseph John. "Evolution and tectonic implications of late Cretaceous - early Tertiary fore-arc magmatism : Alexander Island, Antarctica." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389878.

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35

Rusby, Ruth I. "Tectonic pattern and evolution of the Easter microplate, based on GLORIA and other geophysical data." Thesis, Durham University, 1992. http://etheses.dur.ac.uk/5796/.

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The GLORIA and other geophysical data obtained during this study have enabled the entire present-day tectonic pattern of the Easter Microplate to be determined. The complex nature of all of the plate boundaries has been revealed, and there is evidence of rapid plate boundary evolution. Earthquake focal mechanisms together with GLORIA data have provided the first unequivocal evidence that thrust faulting is taking place along the northern boundary of the microplate. On the Nazca plate to the north of the Easter Microplate, the GLORIA images have disclosed a series of prominent east-west trending ridges which earthquake focal mechanisms and plate tectonics of the region imply are the first known case of intraplate thrusting in young oceanic lithosphere. Slightly younger Nazca plate lithosphere to the north is overthrust over marginally older lithosphere to the south, in order to accommodate the tectonic shortening predicted in the region. Interpretation of magnetic anomaly data and the complex structural information offered by the GLORIA images have permitted a detailed history of the microplate to be determined. Three-plate Nazca-Pacific, Nazca-Easter and Pacific-Easter Euler poles have been calculated and used to rotate the Easter Microplate and surrounding major plates back in time since the East Rift of the microplate first started to propagate northwards at around 5.25 Ma. The microplate has evolved in two stages. The first is from 5.25 Ma to around 2.5 Ma, and involved continuous northward propagation of the East Rift, while the West Rift became segmented along new transform faults as it adjusted to keep the overall Nazca-Pacific velocities constant. The transpressive northern boundary migrated with the East Rift tip, while the transtensional southern boundary remained more or less still. At sometime after 2.5 Ma, the East Rift ceased northward propagation and the Southwest Rift began to open up along the transtensional Pacific-Easter transform. A convergent northern boundary formed involving southward overthrusting of the Nazca plate to the north over the microplate. No more Nazca plate lithosphere from the north of the microplate was transferred to the microplate interior, and the Pito Deep region was caused to open up by pervasively rifting apart pre-existing Nazca plate lithosphere. This study predicts that the Easter Microplate will be transferred onto the Pacific plate within the next 2-5 myr, when the Southwest Rift has propagated through to the southern EPR, and the shear couple on the microplate has ceased.
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36

Birch, Warren Grant. "Palaeomagnetic studies in Western and Central Greece : tectonic evolution of the Aegean domain since the Triassic." Thesis, University of Liverpool, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306424.

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37

Lawrie, Kenneth Campbell. "The origin, nature and tectonic significance of the Hallinmaki Cu-deposit, Virtasalmi district, South-central Finland." Thesis, University of Glasgow, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334056.

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38

WUST, STEPHEN LOUIS. "TECTONIC DEVELOPMENT OF THE PIONEER STRUCTURAL COMPLEX, PIONEER MOUNTAINS, CENTRAL IDAHO (CORE, DETACHMENT, EXTENSION)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183813.

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The Pioneer Mountains of Idaho expose a lower plate core of Precambrian and Ordovician metasedimentary rocks, which are intruded by Cretaceous and Eocene plutonic bodies. The core is separated by a detachment fault from a surrounding upper plate of Paleozoic and Tertiary sedimentary and volcanic units. The detachment system developed during a Tertiary extensional event which overprinted Paleozoic and Mesozoic east-directed compressional features, and exhibits both brittle and ductile (mylonitic) deformation. Stretching lineations in the mylonite and striations along the detachment surface both cluster around N65W. Composite planar fabrics (s- and c-surfaces) in the mylonite and limited development of a mylonitic front along the NW side of the core both suggest a top-to-the-west sense of shear. Minimum translation is estimated at about 17 km. The Pioneer structural complex is one of a number of metamorphic core complexes present along the North American Cordillera. All exhibit Tertiary extensional deformation, expressed as detachment faults structurally adjacent to ductile mylonitic shear zones. Extension directions, as indicated by stretching lineations within mylonite and striations along detachment faults, fall into regional groups in which the directions are similar in trend throughout each group. Asymmetric fabrics on both small and large scales give senses of shear and indicate that tectonic vergence within each group is directed outward from a central axis. The regional consistency of extension directions implies a regional control of extension in metamorphic core complexes. Much of central Idaho, and possibly a large part of eastern Idaho as well, may be riding on the upper part of an extensive detachment terrane, of which the Pioneer complex exposes the deeper levels. The Pioneer complex, and other core complexes, owes its present elevation to isostatic uplift over an overthickened crustal welt of local scale. Larger-scale uplift may be due to a similar isostatic adjustment over a broad zone of crustal thickening from Mesozoic compressional tectonics and intrusion.
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39

Murphy, Michael J. "Geophysical investigation of the tectonic and volcanic history of the Nauru Basin, Western Pacific /." Electronic version, 2004. http://dl.uncw.edu/etd/2004/murphym/michaelmurphy.html.

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40

Zhang, Jian. "Structural geology of the Hengshan-Wutai-Fuping mountain belt implications for the tectonic evolution of the Trans-North China Orogen /." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39557595.

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41

Guntoro, Agus. "Tectonic evolution and crustal structure of the Central Indonesian Region : from geology, gravity and other geophysical data." Thesis, University College London (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307471.

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42

He, Wenjun. "The dalabute ophiolite of the West Junggar Region, Xinjiang, NW China : origin, emplacement and subsequent tectonic evolution /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2472886x.

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43

Rodriguez, Luis Oswaldo. "Tectonic analysis, stratigraphy and depositional history of the Miocene sedimentary section, Central Eastern Venezuela basin /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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44

Khazaradze, Giorgi. "Tectonic deformation in western Washington State from global positioning system measurements /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/6841.

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45

Campbell, Lorraine M. "Basin analysis and tectonic evolution of the Esk Trough in southeast Queensland /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18382.pdf.

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46

Hamblin, Anthony P. "Sedimentology, tectonic control and resource potential of the Upper Devonian - Lower Carboniferous Horton Group, Cape Breton Island, Nova Scotia." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/21150.

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47

Davidson, Benjamin P. "Deformation of the Tectonic Erratics at Henderson Summit, Vinini Creek, Mineral Hill, and Lone Mountain in Eureka County, Nevada." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10785318.

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<p> In the Roberts Mountains of north-central Nevada, several large masses of the autochthonous carbonate succession overlie the highly deformed siliciclastic succession of the Roberts Mountains allochthon (RMA). These carbonate masses, or tectonic erratics, were plucked from the underlying autochthon and carried in the base of the upper plate of the post-Antler Orogeny Henderson thrust as it ramped structurally upwards and eastwards. Kinematic indicators in the form of folds and fractures within the carbonate masses at Henderson Summit, Vinini Creek, Mineral Hill, and Lone Mountain show a general eastward stress direction. Intense brecciation is observed in the lower parts of the carbonate masses and in the immediately underlying siliciclastic strata of the RMA. Based on observations and kinematic evidence, the carbonate masses at Henderson Summit, Vinini Creek, Mineral Hill, and Lone Mountain are interpreted to be tectonic erratics, which in turn further supports and extends the tectonic erratic hypothesis.</p><p>
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48

Nankivell, Adrian P. "Tectonic evolution of the Southern Ocean between Antarctica, South America and Africa over the past 84Ma." Thesis, University of Oxford, 1997. http://ora.ox.ac.uk/objects/uuid:c7a38be2-1973-47ff-9d4e-f4e76d227d46.

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An improved method has been developed for carrying out 2-plate reconstructions, in which fracture zone locations are fitted to synthetic flowlines and magnetic anomaly picks are rotated and fitted to great circles representing other, not necessarily conjugate, anomaly isochrons. This enables the determination of finite rotation poles for regions with sparse data coverage, or where much of one or both plates has been subducted. Misfits and partial derivatives are calculated for each type of data, and combined in a single iterative inversion, allowing the direct calculation of confidence intervals. This method is then extended to a 3-plate reconstruction, taking closure into consideration. The South American - African - Antarctic plate system is then studied. Fracture zone locations are identified from a gravity map constructed from GEOSAT altimeter data, and magnetic anomalies are identified from ship profiles. Two-plate reconstructions are carried out for each plate pair, giving good fits to the observed data, and then all three datasets are combined in a 3-plate reconstruction. Comparison of the results reveals a discontinuity in spreading in the Weddell Sea, believed to be related to pseudo-asymmetric spreading caused by ridge re-organisation in the Paleocene and early Eocene. A revised 3-plate inversion, taking this discontinuity into account, produces an internally consistent set of poles, indicating a closed 3-plate system since anomaly 34 (83Ma), with no evidence for a Malvinas Plate extending into the Weddell Sea in the Late Cretaceous. Disruption to the system from anomaly 32 (71Ma) until anomaly 24 (52Ma), appears to be related to the collision of Africa with Eurasia. A study of the past motion, configuration and stability of the Bouvet Triple junction suggests that for the majority of the past 50Ma it has been in a RFF configuration, in theory considerably less stable than RRR, the other possible configuration.
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49

Janecke, Susanne Ursula 1959. "Structural geology and tectonic history of the Geesaman Wash area, Santa Catalina Mountains, Arizona." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/558061.

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50

Wang, Baiqiu, and 王伯秋. "Paleomagnetism of the paleogene linzizong volcanic series, southern Tibet, and its tectonic implications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41758092.

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