| Upper mantle flow beneath the Northwest of China and its lithospheric dynamics |
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| 引用本文： | 黄建华,常筱华,傅容珊.Upper mantle flow beneath the Northwest of China and its lithospheric dynamics[J].地震学报(英文版),1996,9(2):255-260. |
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| 作者姓名： | 黄建华 常筱华 傅容珊 |
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| 作者单位： | JIAN-HUA HUANGI;XIA-HUA CHANGI and RONG-SHAN FUI(Department of Earth and Space Sciences University of Science and Technology of China Hefei 230026，China |
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| 摘 要： | ＵｐｐｅｒｍａｎｔｌｅｆｌｏｗｂｅｎｅａｔｈｔｈｅＮｏｒｔｈｗｅｓｔｏｆＣｈｉｎａａｎｄｉｔｓｌｉｔｈｏｓｐｈｅｒｉｃｄｙｎａｍｉｃｓＪＩＡＮ－ＨＵＡＨＵＡＮＧＩ（黄建华）；ＸＩＡ－ＨＵＡＣＨＡＮＧＩ（常筱华）ａｎｄＲＯＮＧ－ＳＨＡＮＦＵＩ傅容珊）（...
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| 收稿时间： | 8 November 1994 |
| 修稿时间： | 20 January 1996 |
Upper mantle flow beneath the Northwest of China and its lithospheric dynamics |
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| JIAN-HUA HUANGI,XIA-HUA CHANGI and RONG-SHAN FUI.Upper mantle flow beneath the Northwest of China and its lithospheric dynamics[J].Acta Seismologica Sinica(English Edition),1996,9(2):255-260. |
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| Authors: | JIAN-HUA HUANGI XIA-HUA CHANGI and RONG-SHAN FUI |
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| Institution: | (1) Department of Earth and Space Sciences, University of Science and Technology of China, 230026 Hefei, China;(2) Advanced Centre for Earth Sciences and Astronomy, University of Science and Technology of China, Third World Academy of Science, 230026 Hefei, China |
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| Abstract: | The regional isostatic gravity anomalies in the Northwest of China (80°–95°E, 35°–45°N) and corresponding problems of mantle
dynamics are discussed in detail in this paper. It is assumed that the anomaly of isostatic gravity in this region is caused
by the nonuniformity in density and that the boundary deformation is related to the thermal convection in the upper mantle.
Using the correlation equation between the mantle flow and regional anomalies of isostatic gravity as a constraint, we have
calculated the patterns of upper mantle convection. The result shows that the regional lithospheric tectonics is strongly
correlated with the upper mantle flow. The uplift of the Tianshan and Kunlun Mountains corresponds to the upward flows in
the mantle while the depression of the Tarim, Turpan and Junggar Basins corresponds to the downward flow. Meanwhile, we have
also worked out a basic framework for the lithospheric dynamics of the Northwest of China. It is reasonable to infer that
the mantle flow and the horizontal compression from the India plate may act as the main driving forces for the lithospheric
tectonics of this region.
This project is supported by the Chinese Joint Seismological Science Foundation and the Geodynamics and Geodesy Laboratory
of Wuhan, Chinese Academy of Sciences. |
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| Keywords: | upper mantle lithospheric dynamics thermal convection |
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