摘要
大横路地区出露地层主要为元古界老岭群大栗子组和珍珠门组的低绿片岩相 -高绿片岩相到低角闪岩相的变质岩系 ,北部有少量英云闪长岩 -奥长花岗岩和表壳岩残块。侵入岩主要以燕山期基性 -中基性为主。铜钴矿床产于含碳绢云千枚岩中 ,矿体长 36 0～ 140 0m ,宽 95～ 80 0m ,厚 3～ 10 8.7m ,呈层状、似层状、分枝状 ,矿石以浸染状为主 ,次为脉状、网脉状。矿床属多期多成因类型 ,主要受大栗子组地层、北东向断裂构造和变质作用控制 ,并有岩浆热液的叠加。
The strata in the mining field is mainly Dalizi Formation and Zhenzumen Formation of Proterozoic Laoling Group with greenschist-high to amphibolite metamophic facies. And there is a small quantity of tonalite-trondhjemite and residual supracrustal rock in the northern part . The intrusive rock is mainly Yanshan epoch basic-intermediate acidic vein rock . The beded and branched ore bodies in tne carbon-bearing sericite phyllite are about 360～1 400 m long, 95～800 m wide, 3～108.7 m thick. The ore is mainly disseminated, then vein and netted. It is considered that the Dahenglu Cu , Co deposit is a multiple-origin one with several periods of mineralization, mainly controled by the strata of Dalizi F., northeastrn fault and metamorphism, then the magmatic hydrothermal supraposition.
出处
《前寒武纪研究进展》
2002年第3期206-213,共8页
Progress in Precambrian Research
基金
中国地质调查局"华北地台成矿规律和找矿方向综合研究项目"(编号 :2 0 0 110 2 0 0 0 38)
