SINISTRAL STRIKE-SLIP FAULTS ALONG THE SOUTHERN ALASHAN MARGIN AND EASTWARDS EXTENDING OF THE ALTUN FAULT
SINISTRAL STRIKE-SLIP FAULTS ALONG THE SOUTHERN ALASHAN MARGIN AND EASTWARDS EXTENDING OF THE ALTUN FAULT
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发表时间：
2006
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通讯作者：
C. Wenbin
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作者：
C. Wenbin
阿拉善南缘断裂束由5条东向、西向汇聚、东展的断裂组成。断裂束的每条断裂延伸超过100km，控制着东西向第四纪盆地的分布，晚第四纪以来以左旋滑动为特征。断裂束西侧的金塔南山断裂与阿尔金断裂东侧的关丹山断裂有交汇的趋势，在变形过程中与文竹山隆升有一定的关系。根据空间相关性，认为金塔南山断裂及整个断裂束是阿尔金断裂的东伸部分。断层束向东伸展的特殊形态有利于分解和吸收滑动运动，这在走滑断层的末端是正常的。断裂束的左旋走滑运动是阿尔金断裂向东延伸的结果，可能开始于早更新世末至中更新世初。
The southern Alashan margin fault bundle is composed of 5 faults which strike EW, converge westward and splay eastward. Each fault of the fault bundle extends more than the 100km, controls the distribution of EW-trending Quaternary basins, and is featured with sinistral slip since the late Quaternary. The western part of the fault bundle—the Jintananshan Fault, tends to meet with the Kuantanshan Fault—the east part of the Altun Fault and has some relations to the Wenzhushan uplift in the transformation. According the spatial correlation, it is believed that the Jintananshan Fault as well as the whole fault bundle is the eastward-extending part of the Altun Fault. The special modality of the fault bundle, which spreads out eastwards, is in favor of decomposing and absorbing the slip movement, which is normal at a strike-slip fault's ends. The sinistral strike-slip movement of the fault bundle is the result of the Altun Fault extending further eastward, which might have begun between the end of the early Pleistocene and the beginning of the middle Pleistocene.