北京南口-孙河断裂与黄庄-高丽营断裂交会区沉积速率差异对断裂活动性的响应

发布时间：2019-07-12 16:07

【摘要】：通过对北京地区南口-孙河断裂与黄庄-高丽营断裂交会处钻孔剖面开展磁性地层学研究,结合沉积物岩石组合特征以及浅部测年数据进行分析,建立了钻孔剖面的第四纪地层格架,由于地层沉积速率对控盆断裂的活动具有较好的响应,对比钻孔沉积速率的变化特征能够对目标断裂的第四纪活动性进行探讨。研究表明,南口-孙河断裂与黄庄-高丽营断裂交会处所控制的断块在第四纪时期存在明显的差异性沉降。早更新世至全新世,南口-孙河断裂活动性表现为强弱交替的特点,黄庄-高丽营断裂则表现为逐渐减弱的特点。早更新世,黄庄-高丽营断裂活动强度大于南口-孙河断裂,之后南口-孙河断裂的活动强度大于黄庄-高丽营断裂的活动强度,直至全新世,2条断裂的活动性趋于一致。
[Abstract]:The Quaternary stratigraphic framework of the borehole section is established through the study of the magnetic stratigraphy of the borehole section at the break of the Nankou-Sun River in Beijing and the fracture of the Huangzhuang-Gao Liying, combined with the combination of the sedimentary rock and the data of the shallow part. Because of the better response of the formation deposition rate to the activity of the control basin, the study of the Quaternary activity of the target fracture can be discussed by comparing the characteristics of the change of the deposition rate of the borehole. The study shows that the fault block controlled by the fault of the Nankou-Sun River and Huangzhuang-high-Li camp has obvious differential settlement during the Quaternary period. From the early Pleistocene to the Holocene, the activity of the Nankou-Sun River is characterized by the alternation of strength and strength. In the early Pleistocene, the activity intensity of the Huangzhuang-Gaoli camp is greater than that of the Nankou-Sun River, and the activity intensity of the fault of the Nankou-Sun River is greater than that of the Huangzhuang-GaoLiying fault, until the Holocene and the activity of the two faults tend to be consistent.
【作者单位】：北京市地质调查研究院;中国地质大学(北京)生物地质与环境地质国家重点实验室;中国地震局地质研究所;
【基金】：北京市规划和国土资源管理委员会(京国土环[2009]308号文)资助
【分类号】：P315.2

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