摘要
萨热阔布金矿床的围岩蚀变表现为一种线性的前进变质作用,使近矿围岩中的黑云母、角闪石晶体增大,并产生了硅线石、红柱石等低压型高温特征变质矿物,同时在含金石英岩中也出现了黑云母、角闪石、石榴石、绿帘石、阳起石、透闪石、菱铁矿等有特殊成因的变质矿物,而且含金石英岩的韧性剪切变形作用甚弱,这些地质特征明显不同于与黄铁绢英岩化退变质作用有关的构造蚀变岩型或剪切带型金矿床,它应该代表一种新的金矿类型,其形成过程可能与断裂变质作用有着内在的成因联系。
The wallrock alteration of the Sarekuobu gold deposit shows the linear progressive metamorphism.There are more biotite and amphibole near the ore body,and there are also the sillmanite and andalusite etc.,which are the metamorphic minerals formed at high temperature of the low-pressure facies series.Contemporarily there are biotite,amphibole,garnet,epidote,actinolite,tremolite,siderite etc.,which are the metamorphic minerals formed from special origin,in the gold-bearing quartzite.Moreover, the tough shear deformation of the gold-bearing quartzite was very weak.Therefore,these geological features are obviously diffierent from the gold deposit of the structural alteration rock type or the shear zone type.It may be a new type of gold deposit.It was formed by the fractural metamorphism.
出处
《矿产与地质》
2004年第1期8-12,共5页
Mineral Resources and Geology
基金
国家305项目["十五"重点科技攻关项目(2001BA609A-07)]
广西培养新世纪学术和技术带头人专项资金项目(编号:2002204)资助。
