云南华坪县南阳金矿水系沉积物地球化学特征及找矿预测

Yunnan Huaping County Nanyang Gold stream sediment geochemical characteristics and exploration prediction

利用Sufer、Mapgis等软件对矿区1：10000水系沉积物地球化学数据分析,选用平均值±3倍标准差（X＋3S）作为上下限反复剔除原始数据的特值,使元素含量服从正态分布,最后以X＋2S作为异常下限（T）,以1T、2T、4T三级浓度分带,圈定Au、Ag、Cu、As单元素异常和Au-Ag-As-Cu综合元素异常,揭示矿区内水系沉积物地球化学异常特征。将异常区与矿区地质特征套合分析,表明异常受地层、岩体、围岩蚀变控制,岩体接触边缘为重点找矿位置。最终,优选2处远景区,分别为1号、2号综合异常区。

By using the Sufer and Mapgis software, analysis 1：10000 stream sediment geochemistry data, selection of mean _＋ standard deviation （X ＋ 3S） as an upper limit repeatedly excluding special value of the original data, so that the positive elements in obedience 3 times state distribution, and finally to X＋2S as the anomaly threshold （T）, to 1T, 2T, 4T three concentration zoning, delineation of Au, Ag, Cu, As single element anomalies and Au-Ag-As-Cu composite element anomalies, revealed the mining area of stream sediment geochemical anomalies. The anomaly and geological characteristics Mining Fit analysis showed that abnormal formations, rock, wall rock alteration control, focus on prospecting rock contact edge position. Eventually, preferably two prospective areas, namely No. 1, No. 2 integrated anomaly.