甘肃金川变质磁铁矿特征研究  

The Metamorphic Magnetite's Characteristic of Jinchuan,Gansu

作　　者：谢兆元[1] 张世涛[1] 

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093

出　　处：《河南科学》2016年第1期98-102,共5页Henan Science

基　　金：国家自然科学基金项目(41103026)

摘　　要：在甘肃金川铜镍硫化物矿床周围实施JCSD钻探项目的过程中,发现磁铁矿化层.经过分析研究该磁铁矿化层的物质组分,时空分布及矿床成因等地质问题.表明金川龙首山铁矿含矿岩石及围岩主要为强烈变质的龙首山岩群晚元古界白家咀子组地层.磁铁矿化主要出现在斜长角闪岩和混合岩中.磁铁矿所赋存的斜长角闪岩经原岩恢复为沉积岩和火山岩两大类.表明铁元素的来源与陆源、火山沉积作用密切相关.进而说明磁铁矿属沉积变质型,区内的成岩作用即为成矿作用.磁铁矿的形成经历了陆源、火山沉积、区域变质改造和混合岩化改造等复杂的过程.In the process of implementing JCSD drilling program around Jinchuan copper-nickel sulfide deposits,the magnetite layer was found.We analyzed the geological problems of substance component of the magnetite layer,the position and genesis of deposits.It showed that iron ore Longshoushan group and surrounding rock into a severedeterioration of the main Longshoushan group late Proterozoic Formation Baijiajuzi.Magnetite was mainly found inthe amphibolite rocks and mixing rock.The occurrence of magnetite amphibolite rocks by the former rock back tothe sedimentary and volcanic rocks two categories,indicating that the source of iron and is closely related to land-based sources,volcanic sedimentation.It was further described that magnetite metamorphic sedimentary diagenesisof the region is the mineralization.The complex process formation of magnetite included terrigenous and volcanicsedimentary,regional metamorphism and migmatite transformation.

关 键 词：龙首山岩群 变质岩 磁铁矿化 原岩恢复 沉积变质 

分 类 号：P574.1[天文地球—矿物学]