| “峨眉地幔柱”对扬子板块和塔里木板块离散的作用及其找矿意义 |
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| 关键词:Paleo-Yangtze plate Paleo-Tarim plate Emei mantle plume Emei taphrogeny Xingkai taphrogeny |
| 基金项目: |
| 作者 | 单位 | | 罗志立 | 成都理工大学,四川,成都,610059 | | 刘顺 | 成都理工大学,四川,成都,610059 | | 刘树根 | 成都理工大学,四川,成都,610059 | | 雍自权 | 成都理工大学,四川,成都,610059 | | 赵锡奎 | 成都理工大学,四川,成都,610059 | | 孙玮 | 成都理工大学,四川,成都,610059 |
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| The Action of "Emei Mantle Plume" on the Separation of the Yangtze Plate from the Tarim Plate and Its Significance in Exploration |
| The present straight distance between the Yangtze plate and the Tarim plate(from Qiemo to Chengdu),is 1 900 km. Nevertheless,many geologists hold that these two plates are connected with or not far from each other according to the comparability of fauna, flora and sedimentary faces of the Early Paleozoic. This is a complicated problem that various geologists are interested in. This paper discusses the kinematic features of separation and congregation of theYangtze plate and the Tarim plate from “Emei taphrogeny” and “Xingkai taphrogeny” in the Paleozoic tectonic plate evolutionary history of China, and deals withthe kinetic mechanism of the Yangtze plate′s eastward migration on the basisof “Emei mantle plume” theory. If the hypothesis that the Yangtze plate was separated from the Tarim plate and migrated eastward in the Permian can hold,it can serve as evidence for the first opening of Paleo-Tethys in China. It isof great geological significance in the study of extensive eruption of Permian basalts in some areas of Russia and India. The action must also have played an important role in the mass extinction during the Late Permian and early Triassic. With this theory, the Panzhihua type V, Ti magnetite deposits and Cu, Ni and Pt deposits may be found in the Altun and adjacent area. A comparison withthe Permian organic reef gas reservoirs in Sichuan is also helpful to the study of the hydrocarbon generationand migration in Tarim basin as well as to the prospecting for large petroleumfields there. |
| LUO Zhi-li,LIU Shun,LIU Shu-gen,YONG Zi-quan,ZHAO Xi-kui,SUN Wei.2004.The Action of "Emei Mantle Plume" on the Separation of the Yangtze Plate from the Tarim Plate and Its Significance in Exploration[J].Acta Geoscientica Sinica,25(5):515-522. |
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