临潼-长安断裂小鲍陂一带晚第四纪剖面研究  

Research on later Quaternary profile near Xiaobaopi village along Lintong-chang'an fault

作　　者：戴王强[1] 韩恒悦[1] 李晓妮[1] 任隽[1] 冯希杰[1] 

机构地区：[1]陕西省地震局,陕西西安710068

出　　处：《地震》2007年第4期129-136,共8页Earthquake

基　　金：国家发展与改革委员会发改投资项目(20041138);陕西省地震局基金项目(200501);地震科学联合基金项目(A07109)

摘　　要：通过临潼-长安断裂带少陵塬段小鲍陂一带断层陡坎和断层剖面的地质调查,并结合黄土地层光释光(OSL)年龄测试和钻孔探测,研究了该段落晚第四纪以来的地貌标志、活动方式和幅度以及平均滑移速率。该断裂断面明显错断了古土壤(S1)底界,并且断层上断面以裂缝形式延伸至弱古土壤(L1s)地层中,根据光释光(OSL)测年结果该断裂至少在晚更新世中晚期以来仍有活动,以断层两侧晚更新世底界S1地层稳定的趋势面为标志,错距达5 m多。By means of field geological survey on the Lintong-chang＇an fault scarp of the Shaolingyuan segment near the Xiaobaopi village, with loess layers OSL measure and drilling, we studied the geomorphic mark, activity style, scale and the average slide rate of Lintong-chang＇an fault since later Quaternary. The fault obviously dislocated off the ancient soil layer （S1） bottom, and upper fault fissure extended into the ancient soil layer （L1δ）, according to OSL measurement results, the fault is still active since later Quaternary. Regarding layer （S1） stable trend surface beside fault as mark layer, its disturbed distance is about 5m.

关 键 词：活动断层 临潼-长安断裂 晚第四纪剖面 活动性 

分 类 号：P534.63[天文地球—第四纪地质学] P546[天文地球—古生物学与地层学]