摘要
为进一步探明狮子山"飘带矿"构造控矿规律及深部找矿方向,在详实野外地质工作的基础上,深入剖析矿床地质特征、矿化规律和控矿构造特征,得到矿区主要由次级褶皱构造控矿、NE向断裂构造控矿及地层岩性接触带构造控矿三种控矿形式,控矿构造为"飘带矿"的形成提供了运移通道、沉淀-富集空间,与地层岩性共同组成有机的成矿系统:因民组在成矿中扮演富集场所和地球化学障双重角色;落雪组白云岩、鹅头厂组碳质板岩节理、裂隙发育,利于成矿流体运移、矿质交代沉淀,与富集"飘带矿"体关系密切。通过本次厘定的构造控矿特征,下一步找矿工作应围绕Fy-2深延部分、断裂交汇部位进行,尤其围岩蚀变是指示成矿的有利标志。
In order to further prove the ore-controlling structure and prospecting direction of "Ribbon Orebody" in Shizishan mining area,the geological characteristics,mineralization regularity and ore-controlling structure features are analyzed on the basis of geological field survey.According to the analysis result,in this paper it is concluded that there are three major types of ore-controlling structures in Shizishan copper deposit,including the secondary fold,NE-trending faults and the contact zone between the lithological strata.These ore-controlling structures have provided migration pathway and enrichment space for the precipitation of the"Ribbon orebody".These structures constitute the organic metallogenic system with the lithological strata.It is shown that the Yinmin Formation has played a dual roles of enrichment space and geochemical barrier.The joints and fractures developed in the dolomite of Luoxue Formation and carbonaceous slate of Etouchang Formation are closely related to the enrichment of"Ribbon Orebody",which are beneficial to the metallogenicfluid migration and mineral metasomatism and precipitation.Through the summary of the ore-controlling features,the future prospecting work should be focused on the deep section of Fy-2 and intersection part of faults.The wall rock alteration could be regarded as the favorable sign for mineral prospecting.
作者
郑泽光
ZHENG Zeguang(Yunnan Copper Mineral Resources Exploration and Development Co.,Ltd.,Kunming 650051,Yunnan,China)
出处
《矿产与地质》
2019年第6期995-1001,共7页
Mineral Resources and Geology
关键词
铜矿床
“飘带矿”
控矿构造
成矿系统
找矿方向
云南省
copper deposit
"Ribbon-Orebody"
ore-controlling structure
metallogenic system
prospecting direction
Yunnan Province
