| 用拉萨点大地测量资料检测青藏高原地壳的增厚 |
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| 引用本文： | 邢乐林,孙文科,李辉,杨光亮. 用拉萨点大地测量资料检测青藏高原地壳的增厚[J]. 测绘学报, 2011, 40(1): 41-44 |
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| 作者姓名： | 邢乐林 孙文科 李辉 杨光亮 |
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| 作者单位： | 1. 中国地震局地震研究所;2. 中国地震局;3. 地壳运动与地球观测实验室; |
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| 基金项目： | 国家社会公益研究专项(2005DIB3J120); 中国地震局地震研究所基金(IS200926084) |
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| 摘 要： | 青藏高原地壳的隆升与增厚,是一个复杂的热点问题.印度板块和欧亚板块的碰撞挤压导致地壳的隆升与增厚,已被地质、构造学等方面资料证实,但利用大地测量资料定量确定高原地下地壳增厚速率的很少.基于此,利用高精度绝对重力测量资料及GPS结果定量检测高原拉萨点地下地壳增厚速率((3.9±0.8)cm/a),并给出简单的动力学模型,...
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| 关 键 词： | 绝对重力 GPS 青藏高原 拉萨 地壳 隆升 增厚 |
| 收稿时间： | 2009-10-16 |
| 修稿时间： | 2009-12-02 |
Present-day Crust Thickness Increasing beneath the Qinghai-Tibetan Plateau by Using Geodetic Data at Lhasa Station |
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| XING Lelin,SUN Wenke,LI Hui,YANG Guangliang. Present-day Crust Thickness Increasing beneath the Qinghai-Tibetan Plateau by Using Geodetic Data at Lhasa Station[J]. Acta Geodaetica et Cartographica Sinica, 2011, 40(1): 41-44 |
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| Authors: | XING Lelin SUN Wenke LI Hui YANG Guangliang |
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| Affiliation: | XING Lelin1,2,3,SUN Wenke1,LI Hui1,YANG Guangliang1,21.Institute of Seismolgy,China Earthquake Administration,Wuhan 430071,China,2.Crustal Movement Laboratory,3.School of Geodesy and Geomatics,Wuhan University,Wuhan 430079 |
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| Abstract: | The crust of Tibetan Plateau is still uplifting and thickening nowadays by the collision between the Indian plate and Eurasian plate which revealed by the geological and tectonic results,it is also a complex and hot problem which has been studying by global geoscientists.However,almost no quantitative evidence shows whether the plateau is still uplifting or thickening.In this paper we present geodetic evidence of mass loss beneath the Tibetan Plateau and increasing crust thickness which is 3.9±0.8 cm/a by using high accuracy absolute gravity data and the authoritative GPS measurements results,finally we give a simple geodynamic model illustrating crustal thickening of the Tibetan Plateau. |
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| Keywords: | absolute gravity measurement GPS Tibetan Plateau Lhasa crust uplifting thickening |
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