黔西南灰家堡金矿田成矿构造模式及构造地球化学研究

发布时间：2018-03-08 09:11

本文选题：灰家堡背斜　切入点：卡林型金矿　出处：《大地构造与成矿学》2017年02期 　论文类型：期刊论文

【摘要】：通过解析灰家堡金矿田地质和地球物理等资料,建立该矿田成矿构造模式,并应用构造地球化学研究方法了解Au和其他微量元素在不同构造部位分布情况,最后将研究结果应用于找矿勘探实践。灰家堡背斜是龙潭组及其之上地层由弯滑褶皱作用形成的。背斜中Au元素在垂向上主要沿着构造蚀变体和背斜轴分布,在横向上背斜核部越紧闭金矿化越强,显示了明显的背斜控矿特征。微量元素因子分析显示成矿元素组合为Au、As、Sb、Hg和Tl。对应分析表明构造蚀变体中的角砾岩主要富集Sb和Tl,龙潭组和长兴组的生物碎屑灰岩主要富集Au,龙潭组的黏土岩、粉砂质黏土岩等主要富集Hg和As。原生晕垂向分带序列自下而上为Tl-Sb-Hg-Au-As。在综合成矿构造模式和构造地球化学研究的基础上,认为黔西南二叠系-三叠系浅海碳酸盐台地相区的背斜/穹窿及相关的逆断层构造组合区是重要的找矿区域,Au、As、Sb、Hg和Tl元素异常套合最好的地段为找Au有利靶区,高As/Tl比值地段深部找矿潜力大,且碳酸盐岩和黏土岩组合部位是有利的富Au部位。
[Abstract]:Based on the analysis of geological and geophysical data of the Huijiapu gold ore field, the metallogenic tectonic model of the ore field is established, and the distribution of au and other trace elements in different structural positions is studied by using the method of tectonic geochemistry. Finally, the results are applied to prospecting and exploration. The Shijiapu anticline is formed by the bending and slip folds in the Longtan formation and its upper strata. The au elements in the anticline are mainly distributed vertically along the tectonic alteration body and the back inclined axis. The closer the nucleus of the transverse anticline is, the stronger the gold mineralization is. The trace element factor analysis shows that the metallogenic elements are composed of Auto-Asan SbHG and Tl.The corresponding analysis shows that the breccia in the tectonic alteration is mainly enriched in SB and Tllite, the Longtan formation and Changxing formation are bioclastic limestone. Mainly enriched in clay rocks of the Au-Longtan formation, The vertical zonation sequence of primary halo is Tl-Sb-Hg-Au-As.Based on the study of metallogenic tectonic model and tectonic geochemistry, the vertical zonation sequence of primary halo is Tl-Sb-Hg-Au-As. It is considered that the anticline / dome of Permian-Triassic shallow sea carbonate platform facies area in southwest Guizhou and the related reverse fault assemblage are important prospecting areas. The deep prospecting potential in the high As/Tl area is great, and the carbonate and clay rock assemblages are favorable au rich sites.
【作者单位】：国土资源部地球化学探测技术重点实验室中国地质科学院地球物理地球化学勘查研究所;中国科学院地球化学研究所矿床地球化学国家重点实验室;中国科学院大学;
【基金】：物化探所中央级公益性科研院所基本科研业务费专项资金资助项目(AS2016P02) 国家重点研发计划“深地资源勘查开采专项”课题“卡林型金矿立体地球化学探测试验示范”(2016YFC0600607)联合资助
【分类号】：P618.51

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