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From Flysch to Molasse - sedimentary and tectonic evolution of late Caledonian - early Hercynian Foreland Basin in North Qilian Mountains

journal contribution
posted on 2003-03-01, 00:00 authored by Y Du, J Wang, X Han, Guang ShiGuang Shi
The Late Caledonian to Early Hercynian North Qilian orogenic belt in northwestern China is an elongate tectonic unit situated between the North China plate in the north and the Qaidam plate in the south. North Qilian started in the latest Proterozoic to Cambrian as a rift basin on the southern margin of North China, and evolved later to an archipelagic ocean and active continental margin during the Ordovician and a foreland basin from Silurian to the Early and Middle Devonian. The Early Silurian flysch and submarine alluvial fan, the Middle to Late Silurian shallow marine to tidal flat deposits and the Early and Middle Devonian terrestrial molasse are developed along the corridor Nanshan. The shallowing-upward succession from subabyssal flysch, shallow marine, tidal flat to terrestrial molasse and its gradually narrowed regional distribution demonstrate that the foreland basin experienced the transition from flysch stage to molasse stage during the Silurian and Devonian time.

History

Journal

Journal of China University of geosciences

Volume

14

Issue

1

Pagination

1 - 7

Publisher

Zhongguo Dizhi Daxue

Location

Beijing, China

ISSN

1002-0705

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2003, Zhongguo Dizhi Daxue

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