基于PMGRA气体地球化学测量在辽东浅覆盖区找矿的可行性  

Feasibility of Prospecting Based on PMGRA Gas Geochemical Survey in Shallow Covered Area of Liaodong Area

作　　者：林成贵 程志中[1,2] 姚晓峰 颜廷杰[1,2] 李阳 王伟[4] 郭强 Lin Chenggui;Cheng Zhizhong;Yao Xiaofeng;Yan Tingjie;Li Yang;Wang Wei;Guo Qiang(Development and Research Center,China Geological Survey,Beijing 100037,China;Technical Guidance Center for Mineral Resources Exploration,Ministry of Natural Resources,Beijing 100083,China;School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China;4103 Brigade of Non-Ferrous Geological Bureau of Liaoning Province,Dandong 118008,China)

机构地区：[1]中国地质调查局发展研究中心,北京100037 [2]自然资源部矿产勘查技术指导中心,北京100083 [3]中国地质大学地球科学与资源学院,北京100083 [4]辽宁省有色地质局一〇三队,辽宁丹东118008

出　　处：《地球科学》2020年第11期4038-4053,共16页Earth Science

基　　金：国家重点研发计划项目(No.2018YFC0603806);中国地质调查局二级项目(No.DD20190166)。

摘　　要：气体能携带深部矿化信息沿着岩石裂隙和断裂带迁移至地表,因此气体地球化学方法可以用于寻找覆盖层以下的隐伏断裂和矿体.基于便携式多组分气体快速分析仪(PMGRA),应用气体地球化学方法对辽东地区五龙金矿区和青城子地区开展了探索性的试验研究,并辅以相应的土壤地球化学测量进行对比.结果显示,异常区气体的浓度衬值非常大;在部分气体异常区,沿着构造倾向方向,具有CO2异常峰值出现在H2S、SO2和CH4之前的特点.在辽东浅覆盖区,气体和土壤地球化学测量均能反映隐伏构造和矿体;而在覆盖较厚地区,气体地球化学测量对断裂和矿体反映更明显,受覆盖层的类型和厚度影响较小.本次试验结果初步显示了基于PMGRA气体地球化学测量方法在浅覆盖区具有一定的可行性.Gas can carry deep mineralization information migrated to the surface along the rock fissures and fault zones.Therefore,gas geochemical methods can be used to find hidden faults and ore bodies below the cover layer.Based on the Portable Multi-Component Gas Rapid Analyzer(PMGRA)geochemical method,exploratory experimental studies were carried out in Wulong gold mining area and Qingchengzi area,Liaodong area,and supplemented by corresponding soil geochemical surveys for comparison.The results show that the concentration of the gas in the abnormal area is very large,with the abnormal peaks of CO2 appearing before H2 S,SO2 and CH4 in part of the gas anomaly area,along the structural dip direction.In the shallow covered area of Liaodong,both gas and soil geochemical surveys can reflect hidden structures and ore bodies.However,in the thicker covered area,gas geochemical surveys can more clearly reflect the faults and ore bodies,and are less affected by the type and thickness of the cover layer.The results of this test initially show the feasibility of PMGRA geochemical survey method in shallow covered area.

关 键 词：便携式多组分气体快速分析仪 浅覆盖区 五龙金矿 青城子地区 辽东 地球化学 

分 类 号：P593[天文地球—地球化学]