| 利用重力异常研究亚东—格尔木地壳构造 |
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| INTERPRETATION OF THE CRUSTAL STRUCTURE IN YADONG—GOLMUD AREA USING GRAVITY ANOMALIES |
| As an important part of the plan of Chinese Committee on Lithosphere, an 1：500,000 gravity survey was conducted for supplementary stations in the Golmud (Qinghai)—Yadong (Xizang) and Dung La—Nimu (Xizang) in 1987 by the Changchun College of Geology and Lithosphere Research Center, CAGS. 202 stations were laid out along the profile, which is about 1670 km.Based on the measurements, the Moho depth and isostatic anomalies according to Pratt's Hypothesis were computed is the study area. The isostatic information of the earth's crust and the upper mantle were analysed.
Based on the correlation analysis between Bouguer anomalies and station elevations, nine terrains and thirteen large faults were recognized. Finally, from the gravity standpoint, we present a model of plateau bulge and plate collision, and point out that the direct force of plateau bulge is collision of the plates. The isostatic rise movement caused by glacier melt in the plateau is very weak and thought to be subordinate，which can hardly be distinguished from the rapid rise caused by the tectonic movement. |
| MENG Ling-shun,GAO Rui,ZHOU Fu-xiang,LI Li,WANG Hua-xiao.1990.INTERPRETATION OF THE CRUSTAL STRUCTURE IN YADONG—GOLMUD AREA USING GRAVITY ANOMALIES[J].Acta Geoscientica Sinica,11(2):149-161. |
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