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首页> 外文期刊>Terra Nova >Delimiting the eastern extent of the Altyn Tagh Fault: Insights from structural analyses of seismic reflection profiles
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Delimiting the eastern extent of the Altyn Tagh Fault: Insights from structural analyses of seismic reflection profiles

机译：划定Altyn Tagh故障的东部范围：地震反射型材结构分析的见解

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摘要

The Altyn Tagh Fault (ATF) serves as a key continental-scale controlling structural element of the Tibetan Plateau. However, its eastward extent remains controversial. Here we use high-resolution seismic reflection profiles to investigate the subsurface structures of the easternmost ATF and use these to delimit the easternmost extent of the fault. The structural analyses show an eastward geometric change from transpressional positive flower structures to compressional thrusts, with transpression-induced shortening magnitudes decreasing eastwards from a maximum of similar to 5.3 km to being absent. Stratigraphic controls indicate that the deformation took place over the last similar to<1.2 Ma. Our wider findings lead us to: (a) reject the suggestion that the ATF previously extended beyond the Kuantan Shan-Hei Shan to link with the Alxa-East Mongolia Fau and (b) propose that the rigid block model used to describe the Tibetan Plateau crust is not consistent with the extent and structural details of the easternmost ATF.
机译：阿尔金断裂（ATF）是青藏高原一个重要的大陆尺度控制构造单元。然而，它向东的范围仍然存在争议。在这里，我们使用高分辨率地震反射剖面来调查最东端ATF的地下结构，并使用这些来划定断层的最东端范围。构造分析表明，从转换挤压正花构造向东的几何变化为挤压逆冲，转换挤压引起的缩短震级从5.3 km的最大值向东减小到不存在。地层控制表明，变形发生在过去一个时期，类似于<1.2 Ma。我们更广泛的发现导致我们：（a）拒绝认为ATF先前延伸到关丹山-黑山之外，与阿拉善-蒙古东部断层相连的建议；（b）提出用于描述青藏高原地壳的刚性块体模型与最东端ATF的范围和结构细节不一致。

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  • 来源
    《Terra Nova》 |2021年第1期|共11页
  • 作者

    Zhang Yuqing; Zhang Fengqi; Cheng Xiaogan; Lin Xiubin; Chen Hanlin; Wyrwoll Karl-Heinz; Wu Lei; Chen Jie; Krape Bryan; Lu Yanchou; Ding Weiwei; An Kaixuan; Chen Yaguang; Li Chunyang;

  • 作者单位

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Univ Western Australia Oceans Inst Crawley WA 6009 Australia;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    China Earthquake Adm Inst Geol Beijing Peoples R China;

    Guilin Univ Technol Coll Earth Sci Guilin Peoples R China;

    China Earthquake Adm Inst Geol Beijing Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Earth Sci Key Lab Geosci Big Data &

    Deep Resource Zhejiang Hangzhou 310027 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天文学、地球科学;
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