Palaeozoic collision between the North and South China blocks, Triassic intracontinental tectonics, and the problem of the ultrahigh-pressure metamorphism
| Autor: | Patrick Monié, Wei Lin, Sebastien Meffre, Michel Faure |
|---|---|
| Přispěvatelé: | Institut des Sciences de la Terre d'Orléans (ISTO), Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Institute of Geology and Geophysics [Beijing] (IGG), Chinese Academy of Sciences [Beijing] (CAS), Géosciences Montpellier, Université des Antilles et de la Guyane (UAG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), School of Earth Sciences [Hobart], University of Tasmania [Hobart, Australia] (UTAS), This work has been funded by the national key basis Research program of China (Grant no. 2005CB422101). |
| Rok vydání: | 2008 |
| Předmět: |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics
Global and Planetary Change Continental subduction Triassic tectonics 010504 meteorology & atmospheric sciences Continental collision Paleozoic Permian [SDE.MCG]Environmental Sciences/Global Changes Early Triassic Metamorphism 010502 geochemistry & geophysics Palaeozoic collision 01 natural sciences Devonian Qinling–Dabie Belt Paleontology [SDE.MCG.CG]Environmental Sciences/Global Changes/domain_sde.mcg.cg General Earth and Planetary Sciences Eclogite Ultrahigh-pressure metamorphism Geology 0105 earth and related environmental sciences Zircon |
| Zdroj: | Comptes Rendus Géoscience Comptes Rendus Géoscience, Elsevier, 2008, 340, pp.139-150. ⟨10.1016/j.crte.2007.10.007⟩ |
| ISSN: | 1631-0713 |
| DOI: | 10.1016/j.crte.2007.10.007 |
| Popis: | The Qinling–Dabie Belt represents the boundary between the North and South China blocks (NCB, SCB, respectively), where ultrahigh-pressure (UHP) rocks are widespread. A structural study in eastern Qinling and zircon LA ICPMS dating of the migmatites that form the core of the Central Qinling Unit allows us to argue that continental collision occurred in the Silurian, before 400 Ma. In the Late Palaeozoic, from the Devonian to the Permian, the northern margin of SCB experienced a continental rifting. From the Late Permian to Middle Triassic, northward continental subduction of SCB is responsible for the development of a high-pressure metamorphism. The age of the UHP metamorphism remains unsettled yet. A two-time genesis, Early Palaeozoic and Early Triassic, is often preferred, but a single Palaeozoic age followed by a Triassic resetting cannot be ruled out. |
| Databáze: | OpenAIRE |
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