摘要
阐述了云南滇中地区层控菱铁矿的矿床类型、原生沉积成矿作用特征、区域动力改造成矿作用特征及表生改造成矿作用特征.研究认为,该区菱铁矿的富集成因机制具有多阶段成矿的特点,可分为三个成矿阶段,即：原生沉积-成岩阶段,发生于1600～1500Ma之间,是形成菱铁矿矿源层的重要阶段;区域动力改造阶段,发生于800～650Ma之间,是菱铁矿的主要富集成矿阶段;表生改造阶段,主要发生在第三纪,是菱铁矿床形成垂直分带并再次产生改造加富作用的阶段.
The paper discusses the deposit types, characteristics of primary depositional mineralization, regional dynamically transformed mineralization and supergene transformed mineralization of stratabound siderite ores. It is believed by the research that the genetic mechanism of siderite accumulation is characterized by multiple stage mineralization which is divided into three metallogenic stages, namely primary deposition-diagenetic stage occurring between 1600~ 1500Ma ,which is an important stage of forming siderite ore source layer; regional dynamic transformation stage occurring between 800 ~ 650Ma, being a major siderite accumulation stage; supergene transformation stage occurring in Tertiary Period, which is a stage of forming vertical zonings and superimposed enrichment by transformation.
出处
《矿产与地质》
2006年第3期260-263,共4页
Mineral Resources and Geology
关键词
层控菱铁矿
成矿机制
多因复成
滇中地区
stratabound siderite, metallogenic mechanism, polygenetic origin, center Yunnan
