北京平原构造断块划分及微断块第四纪活动性探讨  

The division of“small blocks”of structure in Beijing plain and a discussion on the activity of micro block in Quaternary period

作　　者：赵勇[1] 蔡向民[1,2] 王继明[1] 张磊[1] 刘予[1] 吕金波[1] 

机构地区：[1]北京市地质调查研究院,北京100195 [2]北京市地质矿产勘查开发局,北京100195

出　　处：《中国地质》2015年第6期1876-1884,共9页Geology in China

基　　金：北京市平原区活动断裂监测专项地质调查项目(批准号:政府办文第30939号)资助

摘　　要：在对北京平原地区地质构造特征综合分析的基础上,依据近年来在活动断裂研究中遇到的问题,本文提出对北京平原区进行构造断块划分的方案。将北京平原区划分为7个"断块",即马池口—沙河、小汤山、顺义、平谷、丰台—来广营、大兴—通州及房山断块。据断块内次一级活动断裂和第四纪地层沉降发育情况,进一步可划出活动微断块,把以研究单一活动断裂重点转变为以控制微断块边界的交汇活动断裂组相互作用为中心。从而揭示出第四纪以来微断块边界交汇活动断裂组的特征、活动方式及其规律等,可为首都城市建设规划和减轻地质灾害等提供有价值的参考,为保障城市地质安全提供地质依据。Based on the geological- tectonic characteristics in Beijing plain,combined with the problems that have emerged in the study of active faults in recent years,the authors carried out the division of＂small blocks＂in Beijing plain, and recognized 7 small blocks, which are Machikou- Shahe small block, Xiaotangshan small block, Shunyi small block, Pinggu small block, FengtaiLaiguangying small block, Daxing- Tongzhou small block and Fangshan small block. In accordance with active faults and the Quaternary sedimentary characteristics in the small block, the small block was further divided into several micro blocks. It is suggested that, in analyzing the activity, the viewpoint should be changed from active fault to active block. The authors revealed the activity of interactional microblocks and their sedimentation during the Quaternary period. This model plays an important role in city planning and construction and provides valuable reference for reducing geological hazards, thus ensuring the safety of urban geology.

关 键 词：构造断块 活动微断块 活动性 北京平原 

分 类 号：P542[天文地球—构造地质学] P534.63[天文地球—地质学]