| 新疆天山（独山子）—西昆仑（泉水沟）地学断面地震与重力联合反演地壳构造特征 |
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| 关键词:GGT crustal structure Tianshan Tarim basin West Kunlun |
| 基金项目:国土资源部项目(9501204)，国家自然科学基金项目(批准号49734230)，国家“305”专项项目(96-915-07-03)，国家重点基础研究发展规划(G1998040800) |
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| 摘要: |
| Corridor Gravity Fields and Custal Density Structures in Tianshan (Dushanzi)-West Kunlun(Quanshuigou)GGT |
| Based on the filetered Bouguer gravity anomaly, seismic data and telluric electromagnetic sounding data, the features of crustal structures of the corridor central profile in Tianshan(Dushanzi) West Kunlun(Quanshuigou) GGT are recognized by using modified empirical formula for the relationship between compressional velocity and density as well as the forward formula of uniform media for the two dimensional polygonal model. The inverse results suggest that North Tianshan, Central Tianshan and Junggar Basin are a monolithic body, and that a relatively low density layer exists between the middle and the lower crust in Jungar basin and Tianshan tectonic belt but does not exist in Tarim basin. As the Tarim basin is compressed by plates on both sides, i.e., Kazakstan Plate on the north and Indian Plate on the south, it looks like an asymmetrical arc, being wider in the North, steeper in the south and upwarped in the middle of the Tarim basin. The V shape coupling relationship between the basin and the range is located between the Tarim basin and the West Kunlun tectonic belt, just above the upwarped area of Moho. |
| HE Ri-zheng,GAO Rui,LI Qiu-sheng,GUAN Ye,LI Peng-wu.2001.Corridor Gravity Fields and Custal Density Structures in Tianshan (Dushanzi)-West Kunlun(Quanshuigou)GGT[J].Acta Geoscientica Sinica,22(6):553-558. |
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