摘要
三道湾子碲金矿床位于黑龙江省北部大兴安岭中段成矿带的东部,为一典型的碲化物型金矿床。笔者采用显微镜观察和电子探针分析技术,确认该矿床的矿石中存在碲金银矿、针碲金银矿、碲金矿、碲银矿和碲铅矿等碲化物。矿石中也存在大量自然金颗粒,产在石英、碲金银矿的裂隙中,或与碲化物共生产出。电子探针分析结果显示,该矿床内自然金的w（Au）=85.64%~93.41%,w（Ag）=6.17%~13.48%,为含银自然金,成色为864~938。碲在中、低温条件下易置换硫而使Te以类质同象的形式分散在硫化物的晶格中,但在高碲逸度（fTe2）的条件下,Te易与Au、Ag结合形成大量碲化物。
The Sandaowanzi tellurium-gold deposit is a typical telluride-gold deposit in northern Heilongjiang Province.The ore deposit located in the central section of the Da Hinggan Mountains.Microscope observation and electron microprobe analyses of mineral assemblages of this deposit reveal that 6 different kinds of tellurides such as petzite,sylvanite,calaverite,hessite and altaite are existent in ores of this ore deposit.Lots of native gold occurring in veins of quartz and petzite or coexistent with tellurides were also found in this ore deposit.EPMA test shows that Au possesses 85.64%～93.41% and Ag possesses 6.17%～13.48% in native gold,which can be classified as Ag-bearing native gold with gold fineness of 864～938.Tellurium could easily replace sulfur in middle-low temperature,making tellurium dispersed in lattice of sulfides in the isomorphous form,whereas under high tellurium fugacity conditions,tellurium could easily coexist with Au and Ag to form a number of tellurides.
出处
《矿床地质》
CAS
CSCD
北大核心
2011年第5期855-866,共12页
Mineral Deposits
基金
国家自然科学基金(40973035)
教育部长江学者和创新团队发展计划(IRT0755)
高等学校学科创新引智计划(B07011)
中国地质调查局"我国三稀金属资源战略调查"项目(编号1212011120354)的部分研究成果
关键词
地质学
碲金矿床
碲化物
自然金
三道湾子
黑龙江
geology
tellurium-gold deposit
tellurides
native gold
Sandaowanzi
Heilongjiang
