北京凹陷北缘第四纪凹陷盆地沉积速率变化特征与顺义断裂活动性的响应关系  

The response relationship between the variation characteristics of deposition rate of Quaternary depression basin on the northern margin of Beijing depression and the activity of Shunyi fault

作　　者：张磊[1] 何静[1] 白凌燕[1] 蔡向民[1] 王继明[1] 杨天水[2] 

机构地区：[1]北京市地质调查研究院,北京100195 [2]中国地质大学生物地质与环境地质国家重点实验室,北京100083

出　　处：《中国地质》2016年第2期511-519,共9页Geology in China

基　　金：北京市国土资源局"北京平原区活动断裂监测专项地质调查项目"(京国土环【2009】308号文)资助~~

摘　　要：北京凹陷受黄庄—高丽营断裂与南苑—通县断裂共同控制,形成于古近—新近纪。凹陷北缘在第四纪由于顺义断裂的强烈活动解体,形成2个新的凹陷,后沙峪凹陷和俸伯凹陷。文章在后沙峪凹陷内开展了钻孔ZK19的第四纪磁性地层研究,结合光释光测年结果获得钻孔ZK19早更新世、中更新世、晚更新世和全新世地层底板埋深分别为434 m、128 m、29.9 m和1.35 m。通过与俸伯凹陷内钻孔ZK12-2进行沉积地层厚度与沉积速率的对比分析,探讨了顺义断裂第四纪以来的活动特点,从而对北京凹陷北缘盆地演化进行了探讨。研究表明,顺义断裂在第四纪早更新世的强烈活动最终造成了北京凹陷北缘盆地的解体;中更新世,顺义断裂相对于黄庄—高丽营断裂活动性不甚明;晚更新世,顺义断裂相对于黄庄—高丽营断裂再次强烈活动,加速了北京凹陷北缘盆地的分化;全新世,顺义断裂强烈活动并造成了地表地裂缝的发育和建筑物的破坏。Controlled by both Huangzhuang- Gaoliying fault and Nanyuan- Tongxian fault, Beijing depression was formed in the Tertiary period. The northern margin of Beijing depression in Quaternary disintegrated due to the strong activity of the Shunyi fault,and formed two new depressions, i.e., Houshayu depression and Fengbo depression. In this study, the authors conducted the research on Quaternary magnetic strata in drill hole ZK19. In combination with the OSL results, the bottom depths of earlyPleistocene, Middle Pleistocene, late Pleistocene and Holocene strata in drill hole ZK19 were determined, which are 434 m,128 m, 29.9 m and 1.35 m respectively. By comparative analysis of the sedimentary thickness and deposition rate of drill hole ZK12-2 in Fengbo depression, the authors investigated the Shunyi fault activity characteristics since the Quaternary, and discussed the evolution of the basin on the northern margin of Beijing depression. The results show that the intense activity of Shunyi fault in the early Pleistocene resulted in the disintegration of the basin on the northern margin of Beijing depression. In the Middle Pleistocene, the activity of Shunyi fault was indistinct relative to Huangzhuang- Gaoliying fault. In the late Pleistocene, Shunyi fault had a strong activity again relative to Huangzhuang- Gaoliying fault, which accelerated the disintegration of the basin on the northern margin of Beijing depression. In the Holocene, the strong activity of Shunyi fault caused the growth of ground fissures and the destruction of buildings.

关 键 词：北京凹陷 磁性地层 顺义断裂 活动性 第四纪 

分 类 号：P542[天文地球—构造地质学] P512.2[天文地球—地质学]