摘要
近年来,在深圳盐田谷地内的工程建设中陆续揭露到隐伏型灰岩(或大理岩)分布,发育有溶洞、土洞现象,这在以往的区域地质资料中没有记载。通过收集资料、野外地质调查,首次系统探讨了永庋断裂在盐田谷地下的展布特征、圈定了灰岩分布范围、分析了岩溶发育特征。盐田谷地内的灰岩分布可划为两类形式:第一类是埋藏型,埋藏在下石炭统测水组地层之下;第二类是包裹型,是包裹在火山岩中的大理岩捕虏体。盐田谷地内灰岩分布在永安路片区、洪安围片区和望基湖片区,永安路片区岩溶发育程度强烈,洪安围片区岩溶发育程度中等;望基湖片区大理岩随机分布,呈透镜体状,岩溶发育程度中等。
In recent years, the distribution of concealed limestone(or marble) and the development of Karst caves and soil caves have been revealed in the engineering construction in Yantian Valley, Shenzhen, which has not been recorded in the previous regional geological data. Through data collection and field geological survey, the distribution characteristics of Yonggui fault underground in Yantian Valley are systematically discussed for the first time, the distribution range of limestone is delineated, and the karst development characteristics are analyzed. The distribution of limestone in Yantian Valley can be divided into two types: the first type is buried type, which is buried under the Lower Carboniferous Ceshui Formation;The second type is wrapped, which is marble xenoliths wrapped in volcanic rocks.Limestone in Yantian Valley is distributed in Yong’an Road area, Hong’anwei area and Wangji Lake area;The Karst development degree in Yong’an Road area is strong and that in Hong’anwei area is medium;Marble is randomly distributed in Wangji Lake area, showing lenticular shape, and Karst development degree is moderate.
作者
王贤能
WANG Xian-neng(Shenzhen Geokey Group Co.,LTD.Shenzhen,Guangdong 518057,China)
出处
《地质灾害与环境保护》
2021年第4期65-73,共9页
Journal of Geological Hazards and Environment Preservation
关键词
盐田谷地
灰岩
大理岩
岩溶发育特征
捕虏体
永庋断裂
Yantian valey
limestone
marble
the characteristics of Karst development
xenoliths
Yonggui fracture
