北祁连天鹿砂岩铜矿床成矿特征

Metallogenic characteristics of sandston-type copper deposit of Tianlu, North Qilian mountains

No.4 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration Dvelopment, Jiuquan 735000, China

摘要: 北祁连天鹿砂岩铜矿床产在北祁连造山带北部志留纪地层中,矿层产于旱峡组灰绿色岩层底部或紫红色岩层的灰绿色夹层中,具有稳定的层位特征。主矿体中原生矿石矿物具有明显的分带性,为典型的沉积成因铜的硫化物排列组合特征。该矿床主要由晚志留世沉积成矿作用形成,成矿环境为残留海盆,在潮坪沉积环境向泻湖环境转变时形成工业矿体;后期改造成矿作用微弱,形成极少量的闪长斑岩型铜矿。
- 北祁连山 /
- 天鹿 /
- 砂岩铜矿 /
- 矿床特征
Abstract: The Tianlu sandstone copper deposits located in the Silurian perio dstratum that belong to the northern part of north Qilan orogenic belt.The ore bed is hosted in the basal gray green layer of Hanxia Group or the graygreen interbed in the purplish layer.The mainly orebody is typic arrangement assemblage feature of sulphide of sediment orogenic copper ore because primary mineral has obviously zonation.The deposits is formed by deposit mineralizing precessing in Late Silurian Epoch,The ore-forming environment is relict seabasin.The industrial orebody is formed in conversion processing from tidal flat environment to lagoon environment.The reform mineralizing process is faint and yield a few diorite-porphyry copper ore in later period.
- North Qilian mountains /
- Tianlu /
- sandston-type copper deposit /
- deposit characteristics