Thrust systems and contractional tectonics

Butler, Rob; Bond, Clare E.

doi:10.1016/b978-0-444-64134-2.00008-0

Cited by 6 publications

(7 citation statements)

References 15 publications

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“…Moreover, thrusts in the outer wedge are often well-covered by sediments in form of growth strata, and are therefore called to be the buried thrust system. In contrast, thrusts in the inner wedge often cross cut the sedimentary cover as a sequence of imbricate structures, which are called emergent thrust system (e.g., Butler, 2004Butler, , 2020) (Fig. 5e).…”

Section: Model Resultsmentioning

confidence: 99%

“…In a structural geological context, a thrust sequence refers to a set of thrusts within a thrust system that do not initiate coevally. Thrust systems are generally composed of a series of geometrically and kinematically interacting (interlinked) thrusts as a result of horizontal shortening and are the dominant structural features of many orogenic belts (e.g., Boyer and Elliott, 1982;Butler and Bond, 2020). The term thrust sequence commonly applies to the order deformation proceeds to produce a system of thrusts (e.g., Butler, 1987;Alsop et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Hybrid thrust sequences – A new structural perspective

Nabavi

Ruh

2023

Journal of Asian Earth Sciences

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Section: Model Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid thrust sequences – A new structural perspective

Nabavi

Ruh

2023

Journal of Asian Earth Sciences

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“…above the limestones, likely because of the erosion related to the Sardic Phase [33,38]. The thrusts envelop the limestone slices with an anastomosed geometry and played the role of preferential conduits for fluids because they are zone of weakness with higher permeability than the surrounding rocks [64,65].…”

Section: Discussionmentioning

confidence: 99%

Passive Structural Control on Skarn Mineralization Localization: A Case Study from the Variscan Rosas Shear Zone (SW Sardinia, Italy)

Cocco¹,

Attardi²,

Deidda³

et al. 2022

Minerals

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The case study presented here deals with the Pb-Zn-Cu skarn ores hosted in the Rosas Shear Zone (RSZ), a highly strained domain located in the external zone of the Sardinian Variscan chain. The RSZ is characterized by several tectonic slices of Cambrian limestones within a strongly folded and foliated Cambrian-Ordovician siliciclastic succession, intruded by late Variscan granites and mafic dykes. Based on geological mapping, structural and microscope analyses, our results show that the skarn ores in the RSZ are an example of passive structurally controlled mineralization. The RSZ was structured close to the brittle–ductile transition and, once exhumed to shallower crustal levels, acted as plumbing system favoring a large-scale granite-related fluid circulation. The paragenesis and the mineralization style of the skarn vary slightly according to the peculiarity of the local structural setting: a tectonic slice adjacent to the mafic dyke; an intensely sheared zone or a discrete thrust surface.

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“…The staircase trajectory cf. [128] of the FSS overthrust interpreted by us on the seismic model (Figure 12) appears to resemble a "ramp-and-flat" geometry, regarded as typical of thrust tectonics and often recognized at shallower crustal levels, in which thrusts commonly propagate "up-section" in their attempt to ultimately reach the surface (e.g., [128][129][130]). Nevertheless, its locally sharp, dogleg shape can partly be an artefact, due to a somewhat arbitrarily plotted subvertical velocity boundary between ~6.25 and ~6.90 km/s domains at 27-35 km depth at km ~600 on the seismic model and, also, result from the vertical exaggeration of the model (cf.…”

Section: Sarmatia-fennoscandia Contactmentioning

confidence: 96%

Lithospheric Structure of the East European Craton at the Transition from Sarmatia to Fennoscandia Interpreted from the TTZ-South Seismic Profile (SE Poland to Ukraine)

et al. 2022

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The TTZ-South seismic profile follows the Teisseyre–Tornquist Zone (TTZ) at the SW margin of the East European Craton (EEC). Investigation results reveal the upper lithospheric structure as representing the NW-vergent, NE-SW striking overthrust-type, Paleoproterozoic (~1.84–1.8 Ga) Fennoscandia-Sarmatia suture. The Sarmatian segment of the EEC comprises two crustal-scale tectonic thrust slices: the Moldavo-Podolian and Lublino-Volhynian basement units, overriding the northerly located Lysogoro-Radomian unit of Fennoscandian affinity. The combined results of the TTZ-South and other nearby deep seismic profiles are consistent with a continuation of the EEC cratonic basement across the TTZ to the SW and its plunging into the deep substratum of the adjacent Paleozoic platform. Extensional deformation responsible for the formation of the mid to late Proterozoic (~1.4–0.6 Ga), SW-NE trending Orsha-Volhynia rift basin is probably also recorded. The thick Ediacaran succession deposited in the rift was later tectonically thickened due to Variscan deformation. The Moho depth varies between 37 and 49 km, resulting in the thinnest crust in the SE, sharp depth changes across the TTZ, and slow shallowing from 49 to 43 km to the NW. The abrupt Moho depth increase from 43 to 49 km is considered to reflect the overlying lower crust tectonic duplication within the suture zone.

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Thrust systems and contractional tectonics

Cited by 6 publications

References 15 publications

Hybrid thrust sequences – A new structural perspective

Hybrid thrust sequences – A new structural perspective

Passive Structural Control on Skarn Mineralization Localization: A Case Study from the Variscan Rosas Shear Zone (SW Sardinia, Italy)

Lithospheric Structure of the East European Craton at the Transition from Sarmatia to Fennoscandia Interpreted from the TTZ-South Seismic Profile (SE Poland to Ukraine)

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