滇东南地区三叠世下统石炮组锰矿找矿新进展  

New Progress in Prospecting for Manganese Ore Deposits in Shipao Formation of the Early Triassic of Southeastern Yunnan

作　　者：韦运良 龙鹏[1] 张柏森 莫佳 黄华 陈继永 WEI Yunliang;LONG Peng;ZHANG Baisen;MO Jia;HUANG Hua;CHEN Jiyong(Guangxi Geological Exploration Institute of China Metallurgical Geology Bureau,Nanning,Guangxi 530022)

机构地区：[1]中国冶金地质总局广西地质勘查院,广西南宁530022

出　　处：《地质与勘探》2019年第S01期314-325,共12页Geology and Exploration

基　　金：扬子陆块及周缘矿产地质调查工程“湘西-滇东地区矿产地质调查”二级项目(编号:DD2016032)资助。

摘　　要：湘西-滇东地区矿产地质调查子项目云南广南地区矿产地质调查项目在广南幅下三叠统石炮组中首次发现氧化锰贫锰矿。本文通过对早三叠世锰矿岩相古地理、地层、构造、锰质来源、生物化学作用等控矿因素分析,石炮组作为区内主要含锰岩系之一,属碎屑岩型含锰建造,锰矿产于滇黔桂盆地北西缘台地边缘斜坡-台间盆地边缘相中,锰质主要来源于盆地西南侧的海底火山热液。广南县周边北西向斜坡-盆地边缘相带为区内锰质聚集的有利场所,出露石炮组地层的多个背斜构造为区内氧化锰贫锰矿找矿前景较佳地段。通过对比广西同类型典型矿床,认为该区同样具备探寻深部碳酸锰矿潜力。During a sub-project in the Guangnan area of Yunnan Province,part of the Mineral Geological Surveys of Xiangxi-Diandong Area,for the first time a manganese oxide-poor ore in the Lower Triassic of Shipao Formation was discovered.Analysis of ore-controlling factors such as paleogeography,stratigraphy,tectonic,manganese source and biochemical action shows that the Shipao Formation is one of the main manganese-bearing rock series in this area,which is a clastic rock type construction.The manganese ore occurs in the marginal facies of the platform margin of the northwestern edge of the Dianqiangui basin and the manganese was mainly originated from the submarine volcanic hydrothermal fluid on the southwest side.The northwest trending ramp-basin edge facies in the rim of Guangnan County is a favorable place for manganese accumulation in the area.Meanwhile,multiple anticline structures exposed in the stratum of Shipao Formation are the favorable locations of search for manganese oxide-poor manganese ore.Comparing with the deposits of same type in Guangxi,it is suggested that this area has a potential to find more manganese carbonate ore in the deep subsurface.

关 键 词：广南地区 石炮组锰矿 成矿地质条件 找矿预测 

分 类 号：P618.32[天文地球—矿床学]