安徽省休宁县小贺毒砂—多金属伴生金矿地质地化特征及找金前景浅析

INITIAL ANALYSIS OF GEOLOGICAL AND GEOCHEMICAL FEATURES OF THE DEPOSIT OF ARSENOPYRITE-POLYMETALS AND ASSOCIATED GOLD AND GOLD-PROSPECTING POTENTIAL IN XIAOHE,XIUNING COUNTY,ANHUI PROVINCE

小贺毒砂～多金属矿矿石中部分样品的含金品位可达≥0．3g/t,明显具备伴生金矿产地特征,矿床赋存于晋宁晚期的灵山片麻状花岗岩岩体的断裂带中,岩体遭受强烈挤压破碎和广泛的矿化蚀变,岩石Au、Ag、Pb、Zn、As及Sb、Bi、Cu、Mo异常显著,Au/Ag比值0．03,Co/Ni比值＞1,Pb/Zn比值＞2,Sb/Bi比值＞2,反映出良好的含金性,剥蚀程度较低,具备寻找蚀变岩型金矿床的地质条件。特别值得指出的是1号矿体矿石含金达工业品位,尚有一定广度和深度的矿化蚀变带的存在,小贺毒砂～多金属伴生金矿值得进一步评价。

Gold content ≥ 0.3g/t in some ore samples from the arsenopyrite -poly-metallic deposit in Xiaohe evidently indicates that the deposit is associated with gold ores. The deposit is hosted in the rifted zone of the Lingshan gneissic granite intrusion of the late Jinning period and the intrusion has been subject to intense compressive crushing and extensive mineralized alteration. Au, Ag, Pb, Zn, As, Sb, Bi, Cu and Mo are abnormal in rocks, with Au/Ag being 0.03,Co/Ni 〉 1, Pb/Zn 〉 2, Sb/Bi 〉 2, reflecting good conditions for gold enrichment and lower degree of abrasion. There exist geological conditions for prospecting altered rock gold deposit. Especially, gold content in ore body No. 1 has reached industrial grade and mineralized alteration zone is extensive and to the depth in some way. The deposit is worth of further evaluation.