河南省桐柏县银洞坡金矿床(西段)地球化学找矿标志及预测评价  

GEOCHEMICAL PROSPECTING INDICATORS AND ORE PROGNOSIS IN THE WESTERN PART OF THE YINDONGPO GOLD DEPOSIT, TONGBAI COUNTY, HENAN PROVINCE

作　　者：张冠[1] 

机构地区：[1]河南省地质调查院

出　　处：《物探与化探》2005年第4期304-307,共4页Geophysical and Geochemical Exploration

摘　　要：通过对河南银洞坡金矿床地球化学特征的研究,建立了地球化学找矿标志.元素组合复杂,由Au、Ag、Pb、Zn、As、Cd形成了强异常;主要异常元素浓集中心明显,分带清晰;w(As)/w(Mo)≥4;w(As)+w(Cd)+w(Au)/w(Ni)+w(Co)+w(Mo)≥10;浓集克拉克值≥0.5,变异系数≥1;异常呈条带状有规律分布并受含矿层及构造控制.根据这些标志,在银洞坡矿区外围W4～W24线等地进行了成矿预测,预测结果新增加金金属量11.945 t.The Yindongpo gold deposit is a large-size gold deposit hosted in metamorphosed clastic rocks. Based on a geochemical study of the Yindongpo ore deposit, this paper puts forward some useful indicators for further prospecting. They include complexity of the element association with an obvious Au,Ag, Pb, Zn, As, Cd anomaly, an apparent element concentration center with clear element zonation ; w （As）/w （Mo） ≥4, w （As） ＋ w （ Cd ） ＋ w （ Au ）/w （ Ni ） ＋ w （ Co ） ＋ w （Mo） ≥ 10, Kk （ enriched Clark value ） ≥ 0.5, Cv （ Variation coefficient） ≥ 1, regular distribution of striped anomaly as well as stratigraphic and structural control. On the basis of these indicators, ore prognosis was conducted in the periphery of the Yindongpo deposit, covering the area between W4 and W26 exploration lines. The result has been verified by drilling, with new reserves of 11. 945 t metals of gold obtained.

关 键 词：河南银洞坡金矿床(西段) 地球化学找矿标志 地球化学参数 地球化学异常 预测评价 

分 类 号：P632[天文地球—地质矿产勘探]