湖北金化探异常类型及找矿远景的初步分析

PRELIMINARY ANALYSES OF ANOMALY TYPES OF Au GEOCHEMICAL PROSPECTING AND PROSPECT FOR PROSPECTING IN HUBEI

本文以湖北省区域化探扫面成果为基础,结合异常检查及矿产勘查资料,依据金化探异常产出的地质环境及元素组合特征,将湖北省金化探异常划为九个类型。认为位于大断裂旁侧碳酸盐地层中的Au、Hg、Sb、As异常是寻找微细粒浸染型金矿的重要线索,变质火山岩系中以Au、Ag或Ag、Au为主的异常以及与燕山期中酸性岩浆岩有关的Cu、Au异常有重要找矿意义。震旦系层间破碎带控制的Sb、Au异常和花岗岩体内断裂破碎带Au异常亦有一定找矿前景。

Based on the plane-scanning results with regional geochemical prospecting in Hubei Province, incorporated with the anomaly examination and exploration data of mineral resources and in accordance with the geological environment occurring Au geochemical prospecting anomalies and the characteristics of element assemblages the Au geochemical prospecting anomalies of Hubei Province may be divided into nine types in this paper. It is considered that the Au, Hg, Sb and As anomalies located in carbonate strata on the sides of large fracture are the important clues to look for micro-fine-grained impregnation type of gold ore. The anomalies dominant with Au+Ag or Ag+Au within metamorphic volcanic rock series and the Cu+Au anomalies related to the intermediate-acidic magmatites of Yanshan Period are of important significance for prospecting. The Sb+Au anomalies controlled by interlayer crushed zone of Sinian System and Au anomaly in fracture zone within granite body should provide a certain prospect for prospecting.