黑龙江金厂金矿床成矿流体来源研究

Research of ore-forming fluids of Jinchang gold deposit, Heilongjiang Province

黑龙江金厂金矿床位于元古界太平岭隆起与中生代老黑山断陷的交接部位,属于兴凯湖地块南段,位于中亚-蒙古构造域和滨西太平洋构造域交接复合区段。本文通过研究角砾岩型矿体和裂隙充填型矿体中的流体包裹体特征,认为流体从深到浅的顺序为环状蚀变岩型至裂隙充填脉性;同时结合H-O同位素数据分析,确定了角砾岩型矿体的流体来源主要是岩浆水,裂隙充填脉性矿体的流体以岩浆水和后期改造水为主。

Jinchang gold deposit was in the joint position of the uplifted zone of Proterozoic Taipingling dones and Mesozoic Laoheishan fault basin,which was belong in the southern margin of Xingkai plate,and also in the contact site of the central Asia-Mongolia tectonic domain and the West Pacific.This paper classified the ore body into two kinds,the breccia type and the fracture filling vein type.Considering of the characteristics of the fluid inclutions,the order of ore fluids in the ore body of this type was from the ring altered rock type to the radial fracture filling vein type.By analizing the H-O isotpe data,the auther made sure the fluid of the breccia type ore body was meteoritic water,and the other type was main from meteoritic water and reformed water.