| GPS观测研究青藏东北缘的水平变形特征 |
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| 引用本文： | 张正涛,张永志. GPS观测研究青藏东北缘的水平变形特征[J]. 测绘与空间地理信息, 2005, 28(3): 6-8 |
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| 作者姓名： | 张正涛 张永志 |
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| 作者单位： | 辽宁省测绘产品质量监督检验站,辽宁,沈阳,110034;长安大学地质工程与测绘工程学院,陕西,西安,710054 |
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| 摘 要： | 推导了利用位移场计算主应变、面膨胀、最大剪应变的公式，通过2次重复GPS观测结果，计算了新青藏高原东北缘在1999～2001年间的水平主应变、面膨胀、最大剪应变等水平变形特征量的分布，并分析了在观测后发生的德令哈6．6级地震活动与变形场特征量之间的分布关系。采用力学理论对该地区的地质构造运动、局部形变特征与地震活动的关系进行了讨论。得出了一些有意义的结论和认识。
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| 关 键 词： | 主应变 最大剪应变 面膨胀 地震活动 |
| 文章编号： | 1672-5867(2005)03-0006-03 |
| 修稿时间： | 2004-10-11 |
Research on Characteristics of Horizontal Deformation in Northeast Margin of Tibetan Plateau with GPS |
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| ZHANG Zheng-tao,ZHANG Yong-zhi. Research on Characteristics of Horizontal Deformation in Northeast Margin of Tibetan Plateau with GPS[J]. Geomatics & Spatial Information Technology, 2005, 28(3): 6-8 |
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| Authors: | ZHANG Zheng-tao ZHANG Yong-zhi |
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| Abstract: | The a formulas to compute the main strain, area expansion and maxmuim shear from GPS displacements are derived. Based on the two sets of GPS observations from 1999 to 2000 in northeast margin of Tibetan Plateau from GPS displacements observed from 1999 to 2001, the relationship between earthquakes and the main strain, area expansion and maxmuim shear is discussed and explained by mechanic theory. Some important conclusions are obtained. |
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| Keywords: | main strain maxmium shear area expansion earthquakes |
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