江西大石笏微细粒浸染状金矿床成矿地球化学异常及找矿模式

江西大石笏金矿是江西赣西第一个微细粒浸染状金矿。容矿岩石为细碎屑岩及不纯的碳酸盐岩,有利构造是深大断裂旁侧的次级断裂,化探分散流及次生晕最佳指示元素组合为Au-As-Ag-Sb-Hg-Ba-Tl。通过对其次生晕、分散流和原生晕等异常特征的认识和分析,总结建立该矿床的成矿地球化学元素异常模式,找矿模式总结为化探组合异常(特别是次生晕和分散流异常) 层位 岩性 构造 蚀变。次生晕和分散流异常可有效地缩小靶区,可圈定金矿化带。提出了在成矿有利的地层、构造、岩性、蚀变和矿化条件下,利用异常模式寻找微细粒浸染状金矿床有指导作用。

Geochemical Anomaly and Prospecing Mode of Dashihu Fine-Grain-disseminated Type Gold Deposit in Jiangxi Province

Jiangxi Dashihu gold deposit is the first fine-grain-disseminated gold deposit in the western Jiangxi Province.Based on the study of the anomaly characters of the secondary halo,primary halo,train elements,it's geological anomaly mode of the ore-forming elements is proposed.And the prospecting pattern summarizes as geochemical anomaly(specially secondary halo and train) strata lithological characters structure alteration.The host rock is fine-grained clastic rock.The favorable structure is the secondary fault beside the big-deep fault.And the best combination of secondary halo and train is Au As Ag Sb Hg Ba Ti.