| 佟依坤.化探方法成矿指示元素组合——以豫西牛头沟金矿为例[J].地质与勘探,2014,50(4):712-724 |
| 化探方法成矿指示元素组合——以豫西牛头沟金矿为例 |
| Indicator element association in geochemical surveys: A case study of the Niutougou gold deposit in western Henan Province |
| 投稿时间：2014-01-16 修订日期：2014-04-20 |
| DOI： |
| 中文关键词: 化探方法技术 指示元素组合 熊耳山 牛头沟金矿 异常下限 |
| 英文关键词: Geochemical exploration, indicator elements, Xiong’er Shan, Niutougou gold deposit, anomaly limit |
| 基金项目:中国地质调查局地质调查工作项目（1212011120950）、国家科技支撑计划课题（2011BAB04B09）资助 |
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| 中文摘要: |
| 确定成矿指示元素组合是建立典型矿床地球化学找矿模型的关键步骤。豫西牛头沟金矿床是熊耳山地区近年来发现的大型金矿床之一，矿区矿体及蚀变带在地表出露，并严格受NW向断裂控制，属破碎蚀变岩型金矿。本文利用原生晕基岩和区域水系沉积物的化探数据分析，确定成（或找）矿指示元素组合，并提出利用中国水系沉积物元素含量中位值来确定指示元素的异常下限。基于矿区原生晕基岩元素含量分析，牛头沟金矿成矿指示元素组合为Au、W、Mo、Bi、Cu、Pb、Zn、Cd、Ag、As、Sb、Hg、Co、Y、F，总计15项；根据矿区1:5万水系沉积物化探普查得到的元素异常特征，该区找矿指示元素组合也为上述15项元素；而根据1:20万区域化探元素异常特征，牛头沟金矿区找矿指示元素组合为Au、W、Mo、Bi、Pb、Zn、Cd、Ag、F、Co、Y，共11项。 |
| 英文摘要: |
| The determination of an indicator element association is a key step to establish the geochemical exploration model for a typical deposit. The Niutougou gold deposit is a large one discovered recently in the Xiong￠er Shan region, western Henan province. The ore bodies and primary halos outcrop, which are strictly controlled by NW trending faults, belong to a shear zone-hosted disseminated ore deposit. This work presents how to determine the indicator element association for geochemical surveys from primary halo rock and stream sediment by a case study of the Niutougou gold deposit. And for this method, we suggest using the median values of element content in drainage sediment to determine the lower limits of element anomalies. The analysis of the halos indicates that the element association in the study area includes15 items, i.e. Au, W, Mo, Bi, Cu, Pb, Zn, Cd, Ag, As, Sb, Hg, Co, Y, and F. These 15 items are also recognized from an 1:50000 survey on drainage sediments. While only 11 items, i.e. Au, W, Mo, Bi, Pb, Zn, Cd, Ag, F, Co, and Y, are discriminated as indicator elements from a geochemical survey on a scale of 1:200000. |
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