黔东南地区南华纪锰矿地质地球化学特征  

Geological and Geochemical Characteristics of the Nanhuaian Manganese Deposits in Southeastern Guizhou Province

作　　者：覃英[1,2] 王佳武[1] 李代平[1] 蒋天锐[1] 

机构地区：[1]贵州省地质矿产勘查开发局一0三地质大队,贵州铜仁554300 [2]贵州省地质调查院,贵州贵阳550005

出　　处：《地质与勘探》2013年第6期1060-1069,共10页Geology and Exploration

基　　金：贵州省地矿局科研项目黔东南地区南华世锰矿成矿条件及找矿方向研究(编号:黔地矿科[2009]29号)资助

摘　　要：通过黔东南地区南华纪锰矿成矿地质背景及沉积矿物特征、微量元素及C、O同位素地球化学特征的研究,认为黔东南地区南华系锰矿成矿物质主要来源地壳深部,主要与火山作用及喷气作用有关,沉积成锰盆地受同生深大断裂带的控制,成锰早期构造与热液活动强烈,矿石矿物有热水成矿的痕迹,矿体下部纹层状锰矿有热水成矿的特征,但根据含锰岩系微量元素比值、C、O同位素地球化学特征,分析认为区内锰矿沉积成矿作用以化学及生物化学为主。This paper explores the metallogenic geological background, sedimentary minerals, trace elements and C and 0 isotopes of the Nanhuaian manganese deposits in southeastern Guizhou Province. The results show that the ore-forming materials mainly come from deep crust, and are related with volcanism and exhalation. The sedimentary manganese-bearing basin was controlled by syngenetic deep fault zones. The early strong tectonic and hydro- thermal activities resulted in hot water mineralization traces of ore beds and its minerals, and manganese deposits have part of hot water mineralization characteristics. However, according to the ratios of the trace elements in Mn-bearing series, and the characters of geochemistry of the oxygen isotope and the carbon isotope, it can be inferred that the chemical action and the biochemical action dominate the sedimentary processes of the manganese ores in this area.

关 键 词：南华纪 锰矿 地球化学特征 黔东南地区 

分 类 号：P618[天文地球—矿床学]