桂西北地区超微粒型金矿成矿条件及其成矿预测

THE METALLOGENETIC CONDITIONS OF THE SUPERMICROGRAIN－TYPE GOLD DEPOSITS IN NORTHWESTERN GUANGXI AND ITS MINEROGENETIC PROGNOSES

本文摘要介绍了桂西北地区区域地质特征、超微粒型金矿典型矿床地质特征，简要分析了该类型金矿的成矿条件，其中包括：矿源层条件、沉积相及建造控制因素、构造控矿条件、成矿物理化学条件及表生氧比淋滤和富集及保存条件。在此基础上探讨了本区该类型盒矿的成矿作用和成矿模式，同时建立了找矿模式，最后进行了不同比例尺的成矿预测，并建立了寻找超大型金矿的思路。

This paper summaryly introduced the regional geological characters of NorthwesternGuangxi， geological characters of the typical deposits of the super micrograin-type gold de-posits，and analysed the metallogenetic conditions of the gold deposits， which consist of：con-diton of the source bed， control factors of sedimetary facies and formation，ore-controllingcondition of the structure，physical and chemical conditions of the mineralization and condi-tions of the superficial oxidation leaching and enrichment and preservation， On the basis ofthese，it probed into mineralization and metallogenic model，and established prespecting mod-el. Lastly， it conducted minerogenetic forecast on various scales，and defined the thinking ofthe prespecting the superbig-type gold deposit.