摘要
山门银矿区位于吉林地槽褶皱带西侧石岭隆起带中。银矿体分布于印支-燕山期中-酸性侵入岩体与上奥陶统石缝组断裂叠加-复合接触带的内外侧。矿体严格受NNE向断裂控制,为一裂隙充填为主的破碎蚀变岩型银矿床。成矿热液及成矿物质具多来源,成矿具多期多阶段,成矿环境为低温低压低盐度。
The Shanmen silver ore distric lies in Shiling uplifted belt on the west- ern side f ilin eugeosynclinal fold belt, and silver ore bodies are distributed on the inner and outer ides of the fracture superimposed-compound contact zone between the Indosinian-Yanshanian ntermediate-acid intrusive body and Upper Ordovician Shifeng Formation. The major host rocks re metamorphosed calc-pelitic siltslone, slate, marble as well as quartz diorite and onzonitic ranite. Strictly controlled by NNE-trending fractures, the ore bodies are mostly blind ones hich occur as veinlike, stratoid and lenticular bodies in nearly en echelon arrangement. The eposit is a shattered altered rock type silver deposit with fissure-filling being dominant. he ormation of the ore bodies shows that ore materials were derived from multi-sources, and the reforming process was characterized by the superimposition of poly-phases and poly-stages. ineralization took place in a hydrothermal environment with low temperature, low pressure and ow salinity and dominated by underground hot water and meteoric water.
出处
《矿床地质》
CAS
CSCD
北大核心
1991年第2期152-160,共9页
Mineral Deposits
