| 柴达木地块新生代古地磁新数据及其构造意义 |
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| 关键词:paleomagnetism Qaidam Qinghai-Tibetan plateau rotational deformation |
| 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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| New Cenozoic Paleomagnetic Data from Qaidam Massif and Their Tectonic Implications |
| 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. |
| LI Peng-wu,CUI Jun-wen,GAO Rui,LI Li.2001.New Cenozoic Paleomagnetic Data from Qaidam Massif and Their Tectonic Implications[J].Acta Geoscientica Sinica,22(6):563-570. |
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