The Late Paleozoic-Mesozoic Ocean Plate Stratigraphy Tectonic-Stratigraphic Realms and Framework of the Tethyan Orogenic System in the Qinghai-Xizang Plateau
Song Bowen
Ke Xue
He Weihong
Xu Yadong
Luo Liang
Kong Lingyao
Chen Fenning
Zhang Kexin
Abstract：The Late Paleozoic-Mesozoic(Permian-Cretaceous)was a crucial period for major reorganization of the tectonic-paleogeographic pattern of the Tethyan Qinghai-Xizang Plateau.Three first-order tectonic-stratigraphic units(super-realms)and seventeen second-order tectonic-stratigraphic units(realms)have been devised.Through detailed research of lithostratigraphic unit and its characteristics of sedimentary background and contact-correlation relationship for the continental blocks and their closely associated continental arcs,forearc basins,marginal sea basins,micro-continents etc.In each tectonic-stratigraphic units,we have finally established the Late Paleozoic-Mesozoic ocean plate stratigraphy(OPS)framework for the Tethyan Qinghai-Xizang Plateau.In particular,the spatiotemporal distribution of the ophiolite mélange zones in different tectonic-stratigraphic units are highlighted.By systematically researching the temporal-spatial features of the ophiolite mélange zones and their associated island arc-basin systems in Tethyan Qinghai-Xizang Plateau,we reviewed the evolution history of the Paleo-Tethys Ocean(Longmuco-Shuanghu Ocean,Changning-Menglian Ocean),the Meso-Tethys Ocean(Bangong-Nujiang Ocean)and Neo-Tethys Ocean(Yarlung Zangbo Ocean),thus revealing the evolution process of the Late Paleozoic-Mesozoic tectonic-paleogeographic pattern of the Tethyan Qinghai-Xizang Plateau.
Keywords：Tethyan Qinghai-Xizang Plateauocean plate stratigraphy(OPS)division of tectonic-stratigraphic unitsocean-land transformationstratigraphytectonics
Publication Date：2025-09-30
Online Publishing Date：2025-10-15(First online date of this platform, not the publication date of the document)
Pages：28( 3651-3678 )