| 试论新疆东准噶尔早古生代岩石圈板块构造演化 |
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| EARLY PALEOZOIC EVOLUTION OF LITHOSPHERE PLATE,EAST JUNGGAR, XINJIANG |
| Based on the research into the strata, paleontology, ophiolites, and magmatic activities of island arc-type, Early Paleozoic evolution of the lithosphere plate of East Junggar, Xinjiang, China, is divided into three tectonic stages, i. e. Preordovician within-plate, the Ordovician to the Middle Silurian ocean and the Late Silurian epicontinental sea.During the development of the ocean which separated the north Altai margin of the Siberian with the south Junggar block which was part of the mid-Asia paleoplate before the Ordovician, the oceanic crust was subducted southwards under the Junggar block along the line from Zhaheba to Beitashan. In the northern margin of the block Sorbastau-Zhifang island arc and Kubusu back-arc basin were developed. The closure of the ocean in the end of the Middle Silurian led to collision of the Altai passive margin with the Sorbastau-Zhifang island arc. During the Late Silurian on epicontinental sea occurred in the area. The sediments and Tuvaella fossils contained in the upper Silurian implies that the Junggar block had been part of the Siberian. |
| LI Jin-yi.1991.EARLY PALEOZOIC EVOLUTION OF LITHOSPHERE PLATE,EAST JUNGGAR, XINJIANG[J].Acta Geoscientica Sinica,12(2):1-12. |
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