摘要
Abstract
The Caledonian orogenic belt of the North Qilian Mountains is anintensely 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.关键词
Gansu Province, North Qilian orogenic belt, Caledonian Stage,Silurian, seismites, earthquake event depositsCLC Number：P5 Document ID：AFoundation Item：The research was supported by the National Natural Science Foundation of China (No. 49972078).Author RKey words
Gansu Province, North Qilian orogenic belt, Caledonian Stage,Silurian, seismites, earthquake event depositsCLC Number：P5 Document ID：AFoundation Item：The research was supported by the National Natural Science Foundation of China (No. 49972078).Author R
