冀北步古沟一带萤石矿地物化找矿技术方法组合研究  

Integrated Geological,Geophysical and Geochemical Methods for Prospecting Fluorite Deposits in the Bugugou Area of Northern Hebei Province

作　　者：代晓光[1] 李健[1] 商朋强 胡中国 王志鹏 李津 王猛[1] 张成信[1] DAI Xiaoguang;LI Jian;SHANG Pengqiang;HU Zhongguo;WANG Zhipeng;LI Jin;WANG Meng;ZHANG Chengxin(Geological Institute of China Chemical Geology and Mine Bureau,Beijing 100101;China Chemical Geology and Mine Bureau,Beijing 100013)

机构地区：[1]中化地质矿山总局地质研究院,北京100101 [2]中化地质矿山总局,北京100013

出　　处：《地质与勘探》2022年第4期809-821,共13页Geology and Exploration

基　　金：中国地质调查局项目(编号:DD20160057)资助。

摘　　要：地物化综合信息在热液充填型萤石矿找矿的应用探索具有重要意义。本文以冀北步古沟一带萤石找矿为例,通过综合物化探方法进行有效性试验,总结该地区萤石矿地物化找矿技术方法组合。在地质调查基础上,系统开展了1∶5万水系沉积物地球化学测量、1∶1万土壤剖面测量、高精度磁法测量、天然电场选频测量、电阻率联合剖面测量及高密度电阻率测量等找矿技术方法探索。结果表明,1∶5万水系沉积物测量及1∶1万土壤剖面测量等化探方法可辅助锁定找矿目标区;高精度磁法及天然电场选频测量,可初步判定断裂的位置;电阻率联合剖面及高密度电阻率法测量可进一步探测含矿断裂构造的位置、产状及延伸。通过以上试验研究,建立了冀北地区萤石矿地物化找矿技术方法组合,经工程验证在研究区内新发现萤石矿点1处,取得了较好的效果。实践表明,该套地物化找矿技术方法组合可进一步指导冀北地区的萤石矿找矿工作。It is of great significance to explore the application of comprehensive geological,geophysical and geochemical information in prospecting hydrothermal filling fluorite ores.Taking the Bugugou area of northern Hebei Province as an example,this work summarizes integrated geological,geophysical and geochemical prospecting techniques and methods of fluorite ores in this area through the effectiveness tests of comprehensive geophysical and geochemical exploration methods.On the basis of geological survey,prospecting techniques and methods such as 1∶50,000 stream sediment survey,1∶10,000 soil profiles,high-precision magnetic survey,natural frequency survey,combined resistivity profiles and high-density resistivity survey have been systematically explored.Results show that the stream sediment survey and large-scale soil profiles can help to delineate prospecting targets,and high-precision magnetic method and natural electric field frequency survey can preliminarily locate the faults.In addition,resistivity profiles and high-density resistivity method can further detect the location,occurrence and extension of the ore-bearing fault structures.Based on this,this work established an integrated geological,geophysical and geochemical prospecting technique for prospecting fluorite deposits in northern Hebei Province.The engineering verification has discovered a new fluorite ore spot in the study area,indicative of good prospecting achievement.The research suggests that this method can guide the future fluorite ore prospecting in northern Hebei Province.

关 键 词：萤石矿 物探 化探 技术方法组合 步古沟 冀北 

分 类 号：P619.21[天文地球—矿床学]