青岛沧口断裂的地质构造特征与第四纪活动性研究
摘要
本文根据青岛市活断层探测与地震危险性评价项目初查阶段第四纪地层分析、遥感影像解译、地球化学探测、地质地貌调查与探槽开挖、浅层地震勘探与钻孔探测、地质年代测定等获得的丰富的第一手资料,对青岛沧口断裂的地质构造特征和第四纪活动性进行了详细分析与综合研究,结果表明:沧口断裂经历多期构造变动,是本区的重要断裂之一,它由多支断层组成,控制了中生代的火山活动、盆地沉积和岩浆侵入以及晚第四纪的盆地沉积、山体隆升和水系发育;第四纪以来,沧口断裂的主要活动发生于中更新世晚期至晚更新世早期,表现出中高角度向南东倾的逆冲活动特点,错断了上更新统底面1—6m,而最新活动时代为晚更新世中期,以走滑活动为主,垂直错距0.2—1.1m。
Making use of abundant field survey/exploration data about Quaternary strata,geomorphology and satellite images,geological surveying/trenching results,seismic reflection profiling,drilling results and geological dating,this paper discusses the geological features and Quaternary activities of Cangkou Fault in Qingdao,China. The research results make known that Cangkou Fault has undergone polygenetic tectonic variance,which is one of the key faults in the area.Cangkou Fault is consisted of several sub-faults,and controls the volcanic activity, sedimentation in the basin and magmatic intrusion in Mesozoic Era as well as the sedimentation in basin,uplifting and development of drainage system in the Late Quaternary Period.Since Quaternary the main activity of Cangkou Fault took place from the late Middle Pleistocene to early Late Pleistocene,which display the middie-high angular inclination to Southeast and thrust active features.This fracture staggered the bottom surface of upper Pleistocene Series for 1-6 m.The latest active time is the middle Late Pleistocene with the main feature of strike-slip and 0.2 -1.1 m vertical displacement distance.
Making use of abundant field survey/exploration data about Quaternary strata,geomorphology and satellite images,geological surveying/trenching results,seismic reflection profiling,drilling results and geological dating,this paper discusses the geological features and Quaternary activities of Cangkou Fault in Qingdao,China. The research results make known that Cangkou Fault has undergone polygenetic tectonic variance,which is one of the key faults in the area.Cangkou Fault is consisted of several sub-faults,and controls the volcanic activity, sedimentation in the basin and magmatic intrusion in Mesozoic Era as well as the sedimentation in basin,uplifting and development of drainage system in the Late Quaternary Period.Since Quaternary the main activity of Cangkou Fault took place from the late Middle Pleistocene to early Late Pleistocene,which display the middie-high angular inclination to Southeast and thrust active features.This fracture staggered the bottom surface of upper Pleistocene Series for 1-6 m.The latest active time is the middle Late Pleistocene with the main feature of strike-slip and 0.2 -1.1 m vertical displacement distance.
引文
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王红霞，郭玉贵，2005a．青岛马山-王哥庄断裂带构造活动性分析．地球物理学进展，20(3)：630—634．
王红霞，郭玉贵，2005b．山东沿海及近海地区主要地质灾害类型分析．青岛海洋大学学报，35(5)：751—756．
周本刚，冉勇康，环文林，冉洪流，2002．山东海阳断裂东石兰沟段晚更新世以来地表断错特征与最大潜在地震估计．地震地质，24(2)：159—166．
黄永华，尤惠川，宋毅盛，郭玉贵，环文林，2007．山东胶东半岛地区断裂最新活动性研究．震害防御技术，2(1)：39—49．
林伟，Michel Faure，王清晨，2003．胶东半岛中生代构造演化的几何学和运动学．地质科学，38(4)：495—505．
栾光忠，段本春，1999．青岛及其邻区NE、NW向断裂的活动性研究．青岛海洋大学学报(自然科学版)，29(4)：727—732．
山东省地质矿产局，1991．山东省区域地质志．北京：地质出版社，1—639．
山东省地震局，1997．山东省新构造图及说明书．济南：山东省地图出版社，1—15．
王红霞，郭玉贵，2005a．青岛马山-王哥庄断裂带构造活动性分析．地球物理学进展，20(3)：630—634．
王红霞，郭玉贵，2005b．山东沿海及近海地区主要地质灾害类型分析．青岛海洋大学学报，35(5)：751—756．
周本刚，冉勇康，环文林，冉洪流，2002．山东海阳断裂东石兰沟段晚更新世以来地表断错特征与最大潜在地震估计．地震地质，24(2)：159—166．
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