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| Titel |
Analysis of Basin–Range Coupling Mechanisms during Epeirogenetic Uplift – A Case Study of Tectonic Coupling in the Songpan–Ganzi Plateau–Longmen Mountain–Sichuan Basin Region |
| VerfasserIn |
Danlin Ying, Ying Li |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250147215
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| Publikation (Nr.) |
 EGU/EGU2017-11340.pdf |
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| Zusammenfassung |
| The tectonodynamic evolution of the Songpan–Ganzi Plateau–Longmen Mountain–Sichuan basin region has been analyzed in this paper. The result suggested that the region had experienced principal four stages of evolution. The evolution was beginning with crystalline basement and folded basement formation in the pre–Sinian, then the cartonmarine sedimentary basin from the Sinian to the Middle Triassic was followed by uplift and stretching of the land from the Late Triassic to the Middle Jurassic, and finally compressive orogenesis since the Late Jurassic was happened. To understand the uplift and stretching of the land from the Late Triassic to the Middle Jurassic, a physical modeling experiment was conducted. It was confirmed that a tectonic plateau–ramp–basin geomorphology pattern developed during this period, caused by the wide difference in uplift between the Songpan–Ganzi Plateau and the Sichuan Basin. In the plateau region, the tectonic dynamic environment of uplift and stretching of the land (trailing edge extension) had appeared, which was accompany with the extensional structure styles such as normal faults and graben–horst structures. On the slope between the plateau and the basin, a bedding shear geodynamic environment was formed, and compressive slumped overthrust structure was found for the sliddown of decollement layers under the force of gravity. In the basin, compressive tectonic dynamic environment had emerged, which leaded to a compressive structure, such as thrust faults, overturned folds, and fault–related folds. |
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