| 中国西部布格重力异常特征和地壳密度结构 |
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| 关键词:Bouguer gravity anomaly density structure crust western China |
| 基金项目:国土资源部“重点区段岩石圈三维结构及其演化” |
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| 摘要: |
| Bouguer Anomalies and Crustal Density Structure in Western China |
| With the restriction of reflection/refraction and for the purpose of simulating the crustal density structure in western China, this paper has conducted Bouguer gravity anomaly inversion simulation along the following 3 profiles: Gaer (Tibet)-Buerjin (Xinjiang), Yadong (Tibet)-Golmud (Qinghai)-Erjinaqi (Inner Mongolia) and Altay (Xinjiang)-Chengdu (Sichuan). The crustal density structures are divided into 2 parts. The crustal thickness in the south is larger than that in the north, but the density in the south is lower. The crust in western China is in the state of isostasy. In the crust and upper mantle, the density is characterized by lateral and vertical heterogeneity. The asthenosphere is of low density in Tibet, and the upward buoyancy it caused seems to be one of the uplift mechanisms in Tibet plateau. |
| PENG Cong.2005.Bouguer Anomalies and Crustal Density Structure in Western China[J].Acta Geoscientica Sinica,26(5):417-422. |
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