Permian–Triassic amalgamation of Asia: Insights from Northeast China sutures and their place in the final collision of North China and Siberia

Wei Lin (1) , Michel Faure (2) , Sébastien Nomade (3, 4, 5, 6) , Qinghua Shang (7) , Paul Randall Renne (3, 4)

1 IGG - Institute of Geology and Geophysics [Beijing]
2 ISTO - Institut des Sciences de la Terre d'Orléans
3 Berkely Geochronology Center
4 EPS - Department of Earth and Planetary Science [UC Berkeley]
5 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
6 PALEOCEAN - Paléocéanographie
7 IVPP - Institute of Vertebrate Paleontology and Paleoanthropology

The Central Asia Orogenic Belt (CAOB) corresponds to the domain where Siberia and Mongolia were welded to North China. The eastern extension of the CAOB in NE China is disputed, since both suture location and timing are poorly documented. This paper reports for the first time the recognition of two suture zones in the southern part of Northeast China (Manchuria), between the Fushun Mishan and Yilan-Yitong faults. In the Jilin Province, west-directed thrust sheets involving successively, from west to east, passive continental margin rocks, metamorphic rocks and ophiolites, block-in-matrix formations and arc plutons indicate a Permian–Early Triassic collision. In the Liaoning Province, arc plutonism and top-to-the-north ductile shearing, coeval with the emplacement of an ophiolitic nappe, suggest a Palaeozoic collision. These two sutures are correlated with the Ondor Sum and Solonker sutures, described in Inner Mongolia. A new geodynamic model involving rifting and collision of the southern part of the Xilinhot Block with North China is proposed.

Keywords: NE China; Suture zones; Continental collision; Central Asia Orogenic Belt; Indosinian tectonics

Domains: Tectonics

Wei Lin, Michel Faure, Sébastien Nomade, Qinghua Shang, Paul Randall Renne. Permian–Triassic amalgamation of Asia: Insights from Northeast China sutures and their place in the final collision of North China and Siberia. Comptes Rendus Géoscience, 2008, 340 (2-3), pp.190-201. ⟨10.1016/j.crte.2007.10.008⟩. ⟨insu-00191503⟩