First Discovery of North-South Striking Normal Faults near the Potential Eastern End of Altyn Tagh Fault
First Discovery of North-South Striking Normal Faults near the Potential Eastern End of Altyn Tagh Fault
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阿尔金断裂带潜在东端附近首次发现南北向正断层
DOI：
10.1007/s12583-018-0827-z
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发表时间：
2018-02
影响因子：
3.3
通讯作者：
Wu Ming
中科院分区：
文献类型：
--
作者：
Zhang Bo;Yuan Daoyang;He Wengui;Pang Wei;Wang Pengtao;Wu Ming
阿尔金断裂是青藏高原的北方边界。作为世界上最著名的走滑断层之一，在构造变形和晚第四纪滑动速率研究方面取得了巨大的成就。然而，关于阿尔金断裂是否伸入金塔盆地甚至向东延伸，一直存在争议。本文采用卫星图像解译、野外调查、探槽开挖、光释光测年等方法，对金塔南山东端新发现的南北向陡坎进行了研究。其结果如下：黑河T2阶地上发育一组正断层，总长度约1.40 km，总陡坎高度为30±5 m;第二，在三条探槽中共解释出4个古地震事件，其大致年龄分别为79.97± 19.14kaBP、62.55±13.10、55.41± 10.77kaBP、16.89± 2.08kaBP之前，8.52± 1.49kaBP;第三，与阿尔金断裂西端的南北向正断层一样，新发现的南北向伸展断层可能是阿尔金断裂东端的终止构造，阿尔金大断裂可能终止于金塔南山东端。
The Altyn Tagh fault is the northern boundary of Tibetan Plateau. As one of the most well-known strike-slip fault in the world, great achievements on tectonic deformation and Late Quaternary slip rate have been made. However, there is a long-lasting debate on whether the Altyn Tagh fault extends into the Jinta Basin or even eastward. In this paper, we use satellite image interpretation, field investigation, trench excavation, and optical stimulated luminescence dating to study newly found NS striking scarps in the eastern end of Jinta Nan Shan. The results are as follows: firstly, a group of normal faults develop on terrace T2 of Heihe River, the total length amounts to ∼40 km, total scarp height is 30±5 m; secondly, four paleoseismic events have been interpreted from three trenches, approximate ages of events are 79.97±19.14 ka BP, 62.55±13.10∼55.41±10.77 ka BP, before 16.89±2.08 ka BP, 8.52±1.49 ka BP, respectively; thirdly, just like NS normal faults in the western end of Altyn Tagh fault, the newly found NS extensional faults are likely the terminating tectonics of the eastern end of Altyn Tagh fault, the large Altyn Tagh fault may end in the eastern end of Jinta Nan Shan.
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DOI：
--
发表时间：
2006
期刊：
Seismology and Geology
影响因子：
--
作者：
C. Wenbin
通讯作者：
C. Wenbin
DOI：
--
发表时间：
2014
期刊：
Acta Geological Sinica
影响因子：
--
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
4.2
作者：
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通讯作者：
Peizhen Zhang;P. Molnar;Xi-wei Xu
影响因子：
3.1
作者：
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通讯作者：
R. Gold;E. Cowgill;Xiao-feng Wang;Xuanhua Chen