黄土覆盖区地气测量有效性评价——以甘肃省通渭县陈贾村地区为例  

Effectiveness evaluation of ground geogas measurement survey in a loess-covered area:A case study of Chenjiacun area in Tongwei County,Gansu Province

作　　者：蔺强强 郑琪 苏永红 LIN Qiang-Qiang;ZHENG Qi;SU Yong-Hong(The First Institute of Geology and Mineral Exploration,Gansu provincial Bureau of Geology and Mineral Exploration and Development,Tianshui 741020,China)

机构地区：[1]甘肃省地质矿产勘查开发局第一地质矿产勘查院,甘肃天水741020

出　　处：《物探与化探》2020年第3期533-539,共7页Geophysical and Geochemical Exploration

基　　金：甘肃省省级基础地质调查项目“甘肃省定西市华家岭—黄家窑地区四幅1∶5万矿产远景调查”。

摘　　要：甘肃省通渭县地区区域上成矿地质条件较好,而境内第四系黄土普遍覆盖,传统地球化学方法找矿效果不理想。为探讨地气测量在黄土覆盖区的有效性,选择在陈贾村地区开展地气测量有效性试验。研究发现,工作区发现多处地气异常,异常规律明显,元素相关性较好。对数据处理分析,结合物探数据资料,并实地检查验证发现,地气异常与区内断裂、矿化体及物探异常位置完全吻合,能够清楚反映黄土覆盖区的基本地质概况,表明地气测量在黄土覆盖区有效。该成果为黄土覆盖区找矿提供了新思路。The regional metallogenic geological conditions of the study area are good.The Tongwei County is covered by Quaternary sediments.The traditional geochemical prospecting method is ineffective.In order to investigate the effectiveness of the geogas measurement method in loess-covered region,the authors selected the Chenjiacun area in Tongwei County to carry out effective experiment of the geogas measurement.The results revealed several geogas anomalies in the study area.The geogas anomalies are obvious,and the element correlation is good;in addition,they have good nesting and zoning relationships.Based on combining the geophysical data and verifying the conclusions in the field,the authors processed and analyzed the data.The geogas anomalies are in accord with the faults,mineralized bodies and geophysical anomalies in this area,and can clearly reflect the basic geological conditions of the loess-covered region.The result shows that the geogas measurement is effective in the loess-covered region,and it provides a new thinking for the prospecting in loess-covered region.

关 键 词：黄土覆盖区 地气测量 有效性 地球化学勘查 甘肃通渭县 

分 类 号：P632[天文地球—地质矿产勘探]