云南省大红山铜铁矿床中菱铁矿的成因及赋存规律

Cause and Occurrence Regularity of Siderite Deposit in the Dahongshan Mining Area,Yunnan

对大红山铜铁矿矿床中菱铁矿的地质背景、矿床背景、矿物组合特征进行了描述。并经地球化学分析(菱铁矿化学成分分析、同位素分析)及成矿环境分析,表明其成矿物质来源为海底火山喷发沉积物与正常沉积物的组合。成矿环境为有机质丰富的弱还原环境,有后期热液富集的特征,为海相火山喷发沉积改造型矿床。

The geological background, mineral assemblage characteristics of the siderite deposit are described, and analyzed the geochemical characteristics （siderite ore chemical composition analysis, isotopic analysis） and metallogenic environment. The source of ore-forming materials was combination of the submarine volcano sediments and normal sediment. Metallogenic environment was weak reductive environment, and had rich organic matter. The siderite deposit show late hydrothermal enrichment characteristics,is marine volcano sedimentary＇ reformed deposit.