综合物探法在寻找隐伏半隐伏萤石矿中的应用
Application of Comprehensive Geophysical Exploration Method in Searching for Concealed and Semi Concealed Fluorite Mines
赵嘉炜 1李晓 1刘志远 1柴泉 1张云鹏 1李昭忱 1刘广宇1
作者信息
- 1. 河北省地质调查院,河北石家庄 050200
- 折叠
摘要
冀北地区萤石矿均为低温热液型,其与构造关系极为紧密.本次在冀北某萤石矿普查工作中,在隐伏半隐伏地区利用活性炭测氡法圈定断裂构造位置,利用激发极化法确定萤石矿化体蚀变带在地表的分布范围及其垂向分布特征.结果表明,萤石矿化体位于主断裂附近的次级断裂中,次级断裂因萤石填充堵塞氡气运移通道,氡浓度值相对较低,但活性炭测氡法对主断裂构造仍具有较好的指示作用,因此利用活性炭测氡法寻找主断裂构造位置,结合地质填图及槽探工程等手段在主断裂附近可以有效圈定萤石矿化范围;激电中梯剖面或面积测量可有效圈定矿化蚀变带在地表的分布范围,激电测深反演能够直接反映矿化体在深部的垂向分布特征.活性炭测氡法与激发极化法相组合的方法,辅以其它地质工程手段在冀北地区寻找隐伏、半隐伏低温热液型萤石矿床效果显著.
Abstract
Fluorite deposits in the northern Hebei region,all low-temperature hydrothermal typesare closely related to the structures.During the general survey of a fluorite deposit in the north of Hebei province,the active carbon radon measurement method was used to delin-eate the location of fault structures in the hidden and semi-hidden areas.The distribution range and vertical distribution characteristics of the alteration zone of fluorite mineralized body were determined by induced polarization method.The results show that the fluorite mineralized body is located in the secondary fault near the main fault.And the radon concen-tration in the secondary fault is relatively low,because the fluorite is blocking the radon mi-gration channel.However,the active carbon radon measurement method still has a good indi-cation to the main fault structure.Therefore,the active carbon radon measurement method is used to locate the main fault structures.The distribution of mineralized alteration zones on the earth's surface can be effectively delineated by induced polarization(IP)middle gradient section or area measurement.IP sounding inversion can directly reflect the vertical distribu-tion characteristics of mineralized bodies in the deeppart.The integration of active carbon ra-don measurement and induced polarization method,together with other geological engineer-ing methods,has achieved remarkable results in the search for concealed and semi-concealed low-temperature fluorite deposits in northern Hebei province.
关键词
萤石矿/低温热液/构造/活性炭测氡/激发极化法Key words
fluorite ore/low temperature hydrothermal solution/construction/radon meas-urement with activated carbon/induced polarization引用本文复制引用
基金项目
河北省国土资源厅地质勘查项目(冀自然资勘[2022]051号)
出版年
2024
NETL
NSTL
维普
万方数据