| Silurian Seismites in Hanxia, Yumen, North Qilian Mountains, and Their Tectonic Significance |
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| 作者姓名： | DU Yuansheng GONG Shuyun HAN Xin WANG Jiasheng GU Songzhuand LIN Wenjiao Faculty of Earth Sciences China University of Geosciences Wuhan Hubei |
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| 作者单位： | DU Yuansheng，GONG Shuyun，HAN Xin，WANG Jiasheng，GU Songzhuand LIN Wenjiao Faculty of Earth Sciences，China University of Geosciences，Wuhan 430074，Hubei |
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| 摘 要： | The Caledonian erogenic belt of the North Qilian Mountains is an intensely active structure belt. In the process of the Late Caledonian syn-orogeny, the North Qilian-Hexi Corridor area was situated on the tectonic background of a syn-orogenic basin. In response to the orogenic process of the North Qilian Mountains, typical earthquake event deposits-seismites of the Silurian were widely distributed around Hanxia of Yumen City, the Liyuan River of Sunan County and Biandukou of Minle County. In the Hanxia area, where seismites are typically developed, clastic deposits of tidal-flat facies are the background deposits of the Hanxia Formation. The earthquake event deposits are characterized by sandy mudstone veins, synsedimentary microfractures, micro-corrugated laminations and earthquake breccias, which in turn constitute complex seismites, featuring seismic corrugation, shattering and liquefied sandy mudstone veins, auto-clastic breccias and intraclastic parabreccias. The seismites and tidal flat deposits f
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Silurian Seismites in Hanxia, Yumen, North Qilian Mountains, and Their Tectonic Significance |
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| Authors: | DU Yuansheng GONG Shuyun HAN Xin WANG Jiasheng GU Songzhuand LIN Wenjiao Faculty of Earth Sciences China University of Geosciences Wuhan Hubei |
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| Abstract: | The Caledonian erogenic belt of the North Qilian Mountains is an intensely active structure belt. In the process of the Late Caledonian syn-orogeny, the North Qilian-Hexi Corridor area was situated on the tectonic background of a syn-orogenic basin. In response to the orogenic process of the North Qilian Mountains, typical earthquake event deposits-seismites of the Silurian were widely distributed around Hanxia of Yumen City, the Liyuan River of Sunan County and Biandukou of Minle County. In the Hanxia area, where seismites are typically developed, clastic deposits of tidal-flat facies are the background deposits of the Hanxia Formation. The earthquake event deposits are characterized by sandy mudstone veins, synsedimentary microfractures, micro-corrugated laminations and earthquake breccias, which in turn constitute complex seismites, featuring seismic corrugation, shattering and liquefied sandy mudstone veins, auto-clastic breccias and intraclastic parabreccias. The seismites and tidal flat deposits formed typical sequences of earthquake event deposits. |
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| Keywords: | Gansu Province North Qilian orogenic belt Caledonian Stage Silurian seismites earthquake event deposits |
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