申家窑金矿床地气测量异常特征  

Characteristics of Geogas Anomalies Measured in the Shenjiayao Gold Deposit of Shan County,Henan Province

作　　者：王晓佳[1] 鲁美[1] 王振凯[1] 叶荣[1] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《地质与勘探》2016年第4期667-677,共11页Geology and Exploration

基　　金：国家自然科学基金项目(批准号:41273063;41573037);中国地质调查局地质矿产调查评价专项(批准号:12120113100900)资助

摘　　要：河南申家窑金矿床属典型的蚀变破碎带型金矿,矿区大部分被第四系沉积物所覆盖。文章通过偏光显微镜与扫描电子显微镜观察、电子探针微区分析、矿石成分化学分析等方法,认为申家窑金矿床的主要金矿物为自然金和银金矿,主要载体矿物为石英、黄铁矿和方铅矿。作者在总结矿床矿物学特征的基础上,实验研究了地气测量在该隐伏矿床上方黄土覆盖层的勘查效果。地气测量使用泡塑为捕集介质,利用surfer软件绘制元素空间分布图。元素空间分布图表明Au具有明显的地球化学异常,同时Cu、Pb、Zn等成矿伴生元素也存在异常。综合矿床矿物学的研究结果和元素空间分布特征,认为地气测量异常为矿致异常,地气异常结果能够指示深部隐伏矿体的产状。地气测量方法作为深穿透地球化学找矿方法之一,在研究区能够反映深部矿化,可以应用于黄土覆盖区寻找隐伏矿床。The Shenjiayao gold deposit in Shan County of Henan Province is a typical altered crushed belt type. Most of the ore district is covered by Quaternary sediments. Observations under polarization microscope and scan electron microscope, electron probe and elemental analysis of ores suggest that the primary gold-bearing minerals of this deposit are natural gold and electrum, and the main carrier minerals are quartz, pyrite and galena. Based on the summarized features of mineralogy,the results of the geogas measurement were evaluated in the regolith cover above the concealed ore bodies of the depos- it. The foam was used as the tra/Jping agent in the geogas measurement and surfer software was employed to draw the spatial distribution of elements. The spatial distribution map of the elements indicates that Au geochemical anomalies are quite clear over the ore deposit and are associated with some other a- nomalies such as Cu, Pb,and Zn. Supported by the comprehensive research of mineralogy and the spatial distribution characteristics of elements,it is con- sidered that the source of anomalous elements of geogas is the deep-concealed ore body and these anomalies can effectively indicate the occurrence of the ore body. As one of the geochemical prospecting methods with deep penetration,geogas measurement can reveal the deep-seated mineralization in the research area and can be applied to exploration of concealed deposits in loess overburden areas.

关 键 词：申家窑 金矿床 地气测量 隐伏矿 河南 

分 类 号：P632[天文地球—地质矿产勘探]