城市地质2025，Vol.20Issue(1)：39-46,8.DOI:10.3969/j.issn.2097-3764.2025.01.006
北京平原区隐伏碳酸盐岩地层划分及识别方法研究
Geostratigraphic classification and identification method of hidden carbonate in Beijing plain area
摘要
Abstract
In stratigraphic division of the Beijing plain area,it is difficult to identify the hidden carbonate strata because of the serious lack of physical data such as core.Starting with the study of rock density,this paper analyzes the petrochemical data of exposed bedrock profiles in the Ming Tombs Mountain area,and finds that the physical and chemical properties of rocks in different times and strata have their own characteristics and laws.This is an effective method to study hidden bedrock strata.The results show that when the density of carbonate rock is more than 2.80 g/cm3,it is generally upper and middle Proterozoic strata and when less than 2.80 g/cm3,it is generally Paleozoic strata.CaO percentage at more than 30,CaO/MgO at larger than 8,and Ti/Li at larger than 100 are all indicative of Paleozoic carbonate strata.The above conclusions are also supported by borehole cuttings measurement and analysis.关键词
碳酸盐岩/岩屑/密度测量/岩石化学分析Key words
carbonate rock/density measurement/petrochemical analysis of carbonate cuttings引用本文复制引用
刘清晓..北京平原区隐伏碳酸盐岩地层划分及识别方法研究[J].城市地质,2025,20(1):39-46,8.基金项目
北京市地热资源和矿泉水动态监测及设备维护管理项目资助 （）
