云南新平大红山铁铜矿床地层控矿规律分析  

Analysis of Ore-controlling Regularity of Strata in Dahongshan Iron-copper Deposit,Xinping County,Yunnan Province

作　　者：杨兴华 YANG Xinghua(Dahongshan Copper Mine,Yuxi Mining Co.,Ltd.)

机构地区：[1]玉溪矿业有限公司大红山铜矿,云南省玉溪市653405

出　　处：《现代矿业》2023年第4期17-20,25,共5页Modern Mining

摘　　要：为进一步厘清大红山铁铜矿床形成机理,对前人相关成果及本次矿床地质工作成果进行综合分析。分析认为:①大红山铁铜矿床成因属海底火山喷发—搬运沉积—变质改造型矿床,严格受控于地层岩性,但其成矿形式与火山机构附近“原位沉积”矿床存在较大差异。②矿区大红山群曼岗河组、红山组具有显著的成矿专属性。③曼岗河期火山成矿作用和红山期火山成矿作用为2个不同的火山成矿系统,曼岗河期以火山喷气作用为主,赋矿岩性为火山机构所控制的局域性地质单元,在火山结构内部及附近产出“大红山式”铁矿;红山期以中心式火山溢流作用为主,成矿严格受火山活动强度和沉积环境的双重控制,赋存“大红山式”铜矿。In order to further clarify the formation mechanism of Dahongshan iron-copper deposit,the previous related results and the geological work results of this deposit are comprehensively analyzed.The analysis shows that:①The genesis of Dahongshan iron-copper deposit belongs to submarine volcanic erup⁃tion-transport deposition-metamorphic transformation deposit,which is strictly controlled by stratigraphic lithology,but its metallogenic form is quite different from that of′in-situ deposition′deposit near volcanic edifice.②The Manganghe Formation and Hongshan Formation of Dahongshan Group in the mining area have significant metallogenic specificity.③Manganghe period volcanic mineralization and Hongshan period volcanic mineralization are two different volcanic metallogenic systems.The Manganghe period is dominated by volcanic exhalation,and the ore-bearing lithology is a local geological unit controlled by volcanic institu⁃tions.′Dahongshan′iron ore is produced inside and near the volcanic structure.The Hongshan period is dominated by central volcanic overflow,and the mineralization is strictly controlled by the intensity of volca⁃nic activity and sedimentary environment.

关 键 词：铁铜矿床 控矿条件 成矿演化 

分 类 号：P618.41[天文地球—矿床学] P618.31[天文地球—地质学]