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Palaeozoic collision between the North and South China blocks, Triassic intracontinental tectonics, and the problem of the ultrahigh-pressure metamorphism

journal contribution
posted on 2023-05-16, 23:34 authored by Faure, M, Lin, W, Monie, P, Sebastien MeffreSebastien Meffre
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. © 2007 Académie des sciences.

History

Publication title

Comptes Rendus Geoscience

Volume

340

Issue

2-3

Pagination

139-150

ISSN

1631-0713

Department/School

School of Natural Sciences

Publisher

Elsevier France-Editions Scientifiques Medicales E

Place of publication

PARIS, FRANCE

Repository Status

  • Restricted

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Expanding knowledge in the earth sciences

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