第43卷第5期 2016年10月
doi:10.12029/ge20160528
中
国
地
质
GEOLOGY IN CHINA
董好刚，路耀，蒙文勇，等.珠江三角州沙湾断装带第四纪活动性研究[J].中国地质，2016，43(5)：18031813
Vol.43, No.5 Oct,2016
Dong Haogang, Lu Tao, Li Yiyong, et al. Quaternary activity of Shawan fault in Pearl River delta[J]. Geology in China, 2016, 43(5): 18031813(in Chinese with English abstract)
珠江三角州沙湾断裂带第四纪活动性研究
董好刚路韬何万双？黎义勇曾敏
（1.中国地质调查局式汉地质调查中心，潮北武汉430205;2.中国人民解放军66259部队，内蒙古呼和浩特010010）提要：沙湾断裂是珠江三角州北西向的主干断裂。为了查清其第四纪活动性，我们进行了1：5万地质地貌填图、断层活动年代测定、氢气测量、浅层地勘测和联合钻孔验证及构造解析等工作。第四纪地貌与断裂的耦合性及历史地震情况说明，沙湾断裂目前仍有一定活动性；地质调查及期测未发现断裂切割第四系，索气测量结果表明断裂目前活动性申等以下，说明沙湾断裂目前活动性较弱；年代测量结果表明断裂在中更新世申期至晚更新世前期活动性较强，晚更新世以后活动性渐弱，仅在南段南沙区大岗镇罗汉山发现晚于100ka面。罗汉山构造解析实例说明三角洲局部地段仍受断裂活动控制处于拉张环境，但全新世以来活动性渐弱。综合研究认为，沙湾断裂目前仍有一定活动性，但活动性较弱
键词：珠江三角洲；沙湾断裂带；第四纪地貌；浅层地震探测；年代学；第四纪活动性关
中图分类号：P542*.3;P534.63
文献标志码：A
文章编号：1000-3657(2016)05-1803-1)
QuaternaryactivityofShawanfaultinPearlRiverdelta DONGHao-gang',LUTao',HEWan-shuang,LI Yi-yong',ZENGMin
(1.Institete of Geology and Mineral Resources of Wichan, Wurhan 430205, Hubei, China; 2.66259 Troops, The People's Liberatior
Amy of China, Hohho, Inner Mongolia, 010010)
ee ae eaen ea a ea e o s ee ea fault, the authors conducted a series of work, such as 1:50000 geological mapping, chronological study, determination of radon, shallow seismic reflection and combined drilling verification. According to the analysis of Quaternary geomorphology and fracture coupling as well as the characteristics of historical seismic reflection, the fault is still active. Field survey and shallow seismic reflection show that the fault didn't cut Quaternary strata, and radon measurement also shows that the intensity of the fault activity is weak; ESR chronology shows that the activity intensity was relatively strong before late Pleistocene, and afterward it became weak; tectonic analysis of Luohanshan indicates that local area of Luohanshan was in a tension environment, but activity intensity has become weaker and weaker since late Holocene. In short, Shawan fault is still active, but the intensity is weak.
Key words: Pearl River delta; Shawan fault; Quatemary geomorphology; shallow seismic reflection; age test; Quatemary activity About the first author: DONG Haogang, male, bom in 1970, senior engineer, engages in the study of environmental geology and new tectonic movement; Email : donghaogang@126.com
Fund support: Supported by Investigation and Evaluation of NW Active Faults in the Pearl River Delta (No. 1212011014006)
收稿日期：20160331；改回日期：20160520
基金项目：中国地质调查局地质灾害预警项目“珠江三角洲NW活动断裂调查评价"(1212011014006)资助。
作者简介：董好刚，男，1970年生，高级工程师，主要从事环境地质及新构造运动研究；E-mail;donghaogang@126.com
http://geochina.cgs.gov.cn 中国地质, 2016, 43(5)