西昌米市盆地砂岩型铜-铼矿床地质特征及找矿前景  

Geological characteristics and prospecting otential of sandstone-type copper-rhenium deposits in Mishi Basin,Xichang

作　　者：唐屹[1,2] 郝雪峰 彭宇[1,2] 潘蒙 梁斌 陈榜巧[3] 杨荣 范俊波[1,2] 贺洋 TANG Yi;HAO Xuefeng;PENG Yu;PAN Meng;LIANG Bin;CHEN Bangqiao;YANG Rong;FAN Junbo;HE Yang(Geological Survey of Sichuan Province,Chengdu 610081,Sichuan,China;Sichuan Provincial Key Laboratory of Strategic Evaluation and Utilization of Rare Metal and Rare Earth Resources,Chengdu 610081,Sichuan,China;School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621000,Sichuan,China)

机构地区：[1]四川省地质调查院,四川成都610081 [2]稀有稀土战略资源评价与利用四川省重点实验室,四川成都610081 [3]西南科技大学环境与资源学院,四川绵阳621000

出　　处：《地质通报》2023年第12期2028-2036,共9页Geological Bulletin of China

基　　金：四川省自然资源厅2020年省政府性投资地质勘查(第一批)项目《四川盆地及周边中生代陆相沉积建造中钼、铼等稀有稀散元素资源富集规律基础调查》(编号:DZ202006)。

摘　　要：在四川西昌市昭觉-普格米市中生代陆相盆地下白垩统飞天山组中新发现了与砂岩型铜矿伴生的铼矿体,重点介绍了铜-铼矿床(点)的分布、矿体特征,分析矿床的成因及找矿前景。发现的矿床(点)呈似层状、透镜状分布于砂岩中,主要矿石类型为含沥青条带的碎裂状、透镜状砂岩,矿石中Cu、Re、Ag含量较高,Cu含量0.23%~39.10%,平均7.23%;Re含量为2.76~131.49 g/t,平均为24.70 g/t,Ag含量为41.4~384 g/t,可称为铜-铼-银砂岩型矿床。成矿作用与沥青等有机质关系密切,初步认为Re等元素超常富集的成矿作用与古油藏形成演化具有密切联系。米市盆地飞天山组含矿层位相对稳定,找矿标志明显,具有较大的找矿潜力。A new rhenium ore body associated with sandstone-type copper deposits was discovered in the Lower Cretaceous Feitianshan Formation(K 1 f)of the Mishi Mesozoic continental basin in Zhaojue-Puge,Xichang.This article mainly introduces the distribution of the copper-rhenium deposit(occunence)and the characteristics of the ore body,and preliminary analysis of the genesis and prospecting potential of the ore deposit.The discovered deposits(occurrences)are layered and lenticular distributed in sandstone.The main ore types are fragmented and lenticular sandstones with bituminous bands.The ores of the deposit have relatiively high Cu,Re and Ag,with the content of Cu 0.23%~39.10%,average 7.23%;Re content 2.76~131.49 g/t,average 24.70 g/t,Ag content 41.4~384 g/t,which can be called Cu-Re-Ag sandstone deposit.The mineralization is closely related to organic matter such as bitumen.It is preliminarily believed that the mineralization of rhenium and other elements is closely related to the formation and evolution of ancient oil reservoirs.The Feitianshan Formation(K 1 f)ore-bearing horizon in the Mishi Basin is relatively stable,with obvious prospecting signs and great prospecting potential.

关 键 词：铼矿 稀散金属 有机质 西昌 找矿前景 

分 类 号：P618.41[天文地球—矿床学] P618.87[天文地球—地质学]