摘要
在甘肃金川铜镍硫化物矿床西侧外围实施JCSD钻探项目的过程中,发现4段磁铁矿化层,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,火山碎屑)沉积作用密切相关,进而说明磁铁矿属沉积变质型,成矿物质主要来自陆源沉积岩和火山岩中,而后期的区域变质作用和混合岩化作用是主要的成矿作用。
In the JCSD drilling process which is located at the west side of Jinchuan Ni-Cu sulphide deposits in the Gansu Province, there are 4 section magnetite layers founded through core eatalog and statistics, it appear in the plagioclase amphibolites and mixed granite. The plagioclase amphibolites of magnetite composed by the two types of sedimentary rocks and volcanic rocks, indicates that the source of iron and （terrigenous, pyroclastic） closely related to sedimentation, then explain magnetite belongs to sedimentary metamorphic type, the magnetite type in this area belongs to the sedimentary-metamorphic, the forming materials are from mineralization
出处
《甘肃地质》
2016年第1期39-44,共6页
Gansu Geology
基金
金川铜镍硫化物矿集区科学钻探选址预研究项目(批准号:Sinoprobe-05-01)
关键词
变质型磁铁矿
特征
金川
metamorphic rocks
magnetite
theoriginal rock recovery
sedimentary-metamorphie
