邓军

（中国地质大学，北京100083；广西壮族自治区地质勘查总院，广西南宁530023）

广西大瑶山地区铜金多金属矿床成矿规律研究

邓军

（中国地质大学，北京100083；广西壮族自治区地质勘查总院，广西南宁530023）

以成矿系列理论为指导，在前人大量研究成果的基础上，归纳总结了广西大瑶山地区与浅成—超浅成岩浆岩有关的铜金多金属矿床成矿规律.认为成矿集中分布在晚加里东期和燕山期2个阶段，燕山期是重点成矿期，其中以燕山早期最为重要.以成矿岩体为中心，具有水平方向和垂直方向上的分带性.水平方向上由内向外，由近及远：垂直方向上由深部→浅部，矿床类型表现为由斑岩型→夕卡岩型→断裂-蚀变岩型的特点.矿床（矿化）组合则表现为铜→银（金）→金矿的规律.矿床类型或矿床（矿化）组合均可出现交替叠加或缺失现象.同时指出了今后找矿方向.

浅成—超浅成岩浆岩；铜金多金属；成矿规律；找矿方向；大瑶山地区；广西

Abstract：Dayaoshan in Guangxi Region is a significant Cu-Au polymetal producing area,where the Cu-Au deposits occur mainly in Cambrian strata,related to Caledonian and Yanshanian tectonic activities and magmatism.Based on the theory of metallogenic series and the results of previous geological survey,this paper summarizes the mineralization regularity of the Dayaoshan Cu-Au polymetallic deposits related to the hypabyssal magmatic rocks.It is believed that the metallogenic period of the deposits involved Late Caledonian,Early and Late Yanshanian,among which the Early Yanshanian is the most important.From the center of the mineralized rock body,the deposit types and mineralization are zonated horizontally and vertically.The deposit types vary in the following order:porphyry type→skarn type→fracture-altered rock type,with mineralization zonation of Cu→Ag（-Au）→Au.This zonation can be partly repeated or imperfect.This study points out the prospective areas for further exploration.

Key words：hypabyssal magmatic rock;Cu-Au polymetal;mineralization regularity;prospecting;Dayaoshan region;Guangxi Region

0 引言

大瑶山地区是广西重要的铜金多金属成矿、产矿区之一.前人在该区做了大量的地质矿产研究工作，取得了丰硕的成果［1-15］❶广西区域地质测量队.桂平幅、梧州幅、贺县幅1∶20万区域地质调查报告.1965.，并较好地指导了找矿实践.与浅成—超浅成岩浆岩有关的铜金多金属矿床是该区最主要的矿床类型，特别是在区内发现了次火山岩型或斑岩型铜金矿后，重新打开了该区地质找矿工作的新局面.目前区内已将找矿重点转移至老矿区深……