西淋岗第四纪错断面特征及其成因

doi:10.3969/j.issn.0253-4967.2012.02.010

地震地质 ›› 2012, Vol. ›› Issue (2): 313-324.DOI: 10.3969/j.issn.0253-4967.2012.02.010

西淋岗第四纪错断面特征及其成因

董好刚¹, 黄长生¹, 曾敏¹, 陈雯¹, 赵信文¹, 郭良田², 王萍³

1. 中国地质调查局武汉地质调查中心, 武汉 443003;
2. 广东省地震局, 广州 510070;
3. 中国地震局地质研究所, 北京 100029

收稿日期:2011-10-23 修回日期:2011-12-27 出版日期:2012-06-30 发布日期:2012-07-12
基金资助:
中国地质调查局"全国重要经济区地质环境调查评价与功能区划"项目(1212011140032,1212011140031)资助。

FEATURE AND FORMATION MECHANISM OF THE QUATERNARY FAULT PLANE AT XILINGANG,FOSHAN CITY

DONG Hao-gang¹, HUANG Chang-sheng¹, ZENG Min¹, ZHAO Xin-wen¹, GUO Liang-tian¹, WANG Ping²

1. Wuhan Institute of Geology and Mineral Resources, Wuhan 430003, China;
2. Earthquake Administration of Guangdong Province, Guangzhou 510070, China;
3. Institute of Geology, China Earthquake Administration, Beijing 100029, China

Received:2011-10-23 Revised:2011-12-27 Online:2012-06-30 Published:2012-07-12

摘要/Abstract

摘要： 西淋岗第四纪错断面位于佛山市顺德区陈村镇,有研究者认为这是晚第四纪活动断裂。为了进一步探明该错断面形成的机理,进行了大比例尺地质地貌填图、探槽开挖、浅层地震探测和第四纪地层年代测定等工作。结果表明,该点及其周边地貌上没有最新构造活动的迹象,但符合重力活动的特征。第四纪地层的错断和基岩中的断裂不能配套,不是统一构造应力场的产物。两侧物探反射特征表明,基岩断裂并未错断第四纪地层。根据基础地质条件、工程地质类比和高陡稳定性计算结果判断,该错断面的产生具备重力活动的条件,是重力失衡的结果,而并非由构造作用形成。

关键词: 佛山市西淋岗, 第四纪错断面, 重力失衡, 浅层地震探测

Abstract: A Quaternary fault plane was found located at Chencun Town of Foshan City,which is thought as a late Quaternary active fault by many researchers. To explain the formation mechanism of this fault plane,a series of work was carried out,such as geomorphologic survey,validation by exploratory trench,shallow seismic reflection and dating of Quaternary system,etc. According to the analysis of the geomorphologic features,the contrast between bedrock fault and Quaternary fault,and the characteristics of shallow seismic reflection,there are few geomorphologic signs of recent tectonic activities. The displacement of Quaternary bottom and the rupture in the rocks were not formed in the same tectonic stress field,and the bedrock fault didnt offset the Quaternary formation according to the shallow seismic reflection characteristics. Thus,a conclusion is drawn that the Xilingang Fault plane wasnt generated by tectonic movement but the gravity inequilibrium.

Key words: Xilingang of Foshan City, Quaternary fault plane, gravity inequilibrium, shallow seismic exploration

中图分类号:

P312.5

董好刚, 黄长生, 曾敏, 陈雯, 赵信文, 郭良田, 王萍. 西淋岗第四纪错断面特征及其成因[J]. 地震地质, 2012, (2): 313-324.

DONG Hao-gang, HUANG Chang-sheng, ZENG Min, ZHAO Xin-wen, GUO Liang-tian, WANG Ping. FEATURE AND FORMATION MECHANISM OF THE QUATERNARY FAULT PLANE AT XILINGANG,FOSHAN CITY[J]. SEISMOLOGY AND GEOLOGY, 2012, (2): 313-324.

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西淋岗第四纪错断面特征及其成因

FEATURE AND FORMATION MECHANISM OF THE QUATERNARY FAULT PLANE AT XILINGANG,FOSHAN CITY

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