摘要
天津蓟县东山金矿于1998年由天津地质二队与天津地质矿产研究所首次发现。该金矿的容矿围岩为超浅成次火山岩(斜长玢岩),与其紧密伴生的是超基性的隐爆角砾岩-橄辉云煌岩。该矿床属于与岩浆隐爆作用有关的具较大远景的金矿床,目前已确定1、2、4号矿脉具工业意义。其中4号矿脉经地表及硐探揭露,矿体连结成似筒状,延伸大于延长;矿石为微细粒浸染型,具中低品位(3×10-6～11×10-6),可见厚度5～10m,矿体地表厚度较大,具隐爆角砾岩型特征。
Dongshan gold deposit is firstly discovered by Tianjin No 2 Geological Team and Tianjin Institute of Geology and Mineral Resources in 1998. The host-rock of the gold deposit is superhypabyssal subvolcanic rock plagioporphyry. The superbassic cryptobreccia rock, related to plagioporphyry, is called cascadite. Discorered No.1, No.2 and No.4 ore veins are of industrial significance. No.4 ore vein has been explored with trenches and galleries. The united shape of all the ore bodies is similar to crypto-breccia pipe. The extension of gold bodies is longer than their elongation. Ore types belong to micro-fine grain disseminated. Ore grades belong to mid-low grades (3 ×10-6～ 11×10-6). The thickness of the bodies is 5 ～ 10 m. This deposit can be considered as crypto-breccia-rock type.
出处
《地质调查与研究》
2003年第3期169-176,共8页
Geological Survey and Research
关键词
东山金矿床
斜长玢岩
橄辉云煌岩
岩浆隐爆作用
隐爆角砾岩型
Dongshan gold deposit
plagioporphyry
cascadite
magma cryptoexplosion
cryptoexplosive-breccia-rock type
