黑龙江砂宝斯金矿床成矿物理化学环境研究  

Study on the metallogenic physicochemical environment in Shabaosi gold deposit,Heilongjiang Province

作　　者：王晓勇[1] 贾伟光[2] 张春辉[1] 谢菊梅 胡军海[1] 

机构地区：[1]中国人民武装警察部队黄金第三支队 [2]辽宁沈阳地质矿产研究所

出　　处：《黄金》2005年第2期8-11,共4页Gold

摘　　要：砂宝斯金矿床产于中侏罗统陆相碎屑岩中,金矿体严格受SN向和NNW向断裂构造控 制。矿石类型主要为蚀变砂岩型和构造破碎蚀变岩型。通过对砂宝斯金矿床的流体包裹体及矿石 Pb、C、S、H和O同位素特征研究分析,认为金成矿的物理化学环境:温度为200℃～230℃、压力为 40.9MPa、深度为1.5km;成矿流体具有低盐度、偏碱性、高硫低氧和相对还原的特点,是岩浆热液和 大气降水的混合流体;成矿物质主要来源于深部岩浆,有部分地壳物质的加入。Au主要是以Au- S配合物的形式迁移,成矿流体的压力、pH值降低和Eh值升高是导致Au沉淀的重要因素。The Shabaosi gold deposit occurs in Middle Jurassic continental facies clastic rocks.SN and NNW trend fault strictly control the gold orebody.The ores are mainly altered sandstone and tectonoclastic altered rock.Studies on fluid inclusions,S,C,Pb,H and O isotopes of the Shabaosi gold deposit show that the physicochemical environment of gold mineralization are 200℃～230℃ for temperature,40.9MPa for pressure and 1.5km for mineralization depth.The ore-forming fluid is the mixture of magmatic water and atmospheric water,and is characterized by the lower salinity and alkalinity,high sulfide and low oxidize reduced environment.The metallogenic materials are mainly from the deep magmas and the rest from upper crust.Gold is mainly transferred in the form of gold-sulphur complex compounds.The drop in the ore-forming liquid pressure and pH value,along with the increase of its Eh are the important factors resulting in the precipitation of gold.

关 键 词：砂宝斯金矿床 成矿溶液 流体包裹体 稳定同位素 物理化学环境 

分 类 号：P618.51[天文地球—矿床学]