| 柴达木地块新生代古地磁新数据及其构造意义 |
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| 引用本文： | 李朋武,崔军文,高锐,李莉.柴达木地块新生代古地磁新数据及其构造意义[J].地球学报,2001,22(6):563-570. |
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| 作者姓名： | 李朋武 崔军文 高锐 李莉 |
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| 作者单位： | 中国地质科学院地质研究所 北京，100037;中国地质科学院地质研究所 北京，100037;中国地质科学院地质研究所 北京，100037;中国地质科学院地质研究所 北京，100037 |
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| 基金项目： | 国土资源部“中国岩石圈三维结构数据库”项目(200010101)，自然科学基金项目“塔里木盆地西南缘新生代盆山耦合关系及动力学”(批准号:49972072)，国家重点基础研究发展规划项目(编号:G1998040800) |
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| 摘 要： | 5个新的古地磁数据结合已发表的成果反映了柴达木地块晚第三纪以来的旋转运动特征。东西部旋转运动的差异性反映了不同地区应力场方向变化特征，即从西到东从北转向北东，与震源机制解有很好的对应性。与塔里木南缘相对照，则更进一步说明了青藏高原北缘旋转变形的差异性。柴达木盆地和酒泉，肃北旋转方向的差异预示了两地区间存在左旋错动。
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| 关 键 词： | 古地磁 柴达木 青藏高原 旋转变形 |
New Cenozoic Paleomagnetic Data from Qaidam Massif and Their Tectonic Implications |
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| LI Peng-wu,CUI Jun-wen,GAO Rui and LI Li.New Cenozoic Paleomagnetic Data from Qaidam Massif and Their Tectonic Implications[J].Acta Geoscientia Sinica,2001,22(6):563-570. |
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| Authors: | LI Peng-wu CUI Jun-wen GAO Rui and LI Li |
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| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 |
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| Abstract: | Five new paleomagnetic data together with previously published information on Cenozoic strata of Qaidam basin reveal the rotational feature of Qaidam block since Neogene. The rotational difference between the eastern part and the western part reflects the variation feature of the stress field direction in different areas, i.e., from east to west, the stress direction changes from north to northeast. This is in good accord with present day stress distribution deduced from focal mechanism of earthquakes. A comparison with the rotational feature of the southern rim of the Tarim basin further illustrates the difference of rotational deformation in different areas along the northern rim of the Qinghai Tibetan plateau. The opposite rotation direction implies the existence of left lateral dislocation between Qaidam basin and Jiuquan and Subei areas. |
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| Keywords: | paleomagnetism Qaidam Qinghai-Tibetan plateau rotational deformation |
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