摘要
运用反光显微镜、电子显微镜及其能谱、波谱分析技术 ,对东坪式金矿矿石中的Au、Ag碲化物的共生组合、产状和化学成分进行了系统普查 ,发现除自然金外 ,还有碲金矿、碲金银矿和碲银矿等碲化物 ,它们主要与自然金、黄铜矿连生 ,并包裹于石英型金矿石中的黄铁矿、方铅矿和闪锌矿的表面、孔洞或裂隙。这些碲化物形成于硫化物 石英阶段 ( 2 2 0～ 390℃ ) ,为该阶段金矿化的主要特征 ,对形成石英脉型矿体的原生富金矿石及其Au Te元素组合起决定作用。
Tellurides of gold and silver have been observed under reflected, electronic microscopes, with respect to their occurrence and chemistry by BSE, elemental area scan and EMPA for the gold ores of quartz vein-type from the Dongping-type gold deposits in Hebei Province, China. They include calaverite, hessite, and petzite and occur along with native gold and chalcopyrite, in the inclusions and fissure-fillings of Fe, Pb and Zn sulfides and quartz. They are believed to have been deposited concentratively in the sulfide-quartz stage at 220-390 ℃ in the multiple episodes of gold mineralization based on their assemblages. According to statistics of their occurrences, these tellurides constitute a main carrier of gold, second to native gold for the ores; and they play a decisive role in the formation of high-grade gold ores with Au-Te association in quartz vein orebodies of the Dongping-type gold deposits.
出处
《矿物学报》
CAS
CSCD
北大核心
2002年第4期321-328,共8页
Acta Mineralogica Sinica
基金
国家自然科学重点基金 ( 4 96 33110 )
南京大学博士后基金
南京大学成矿作用研究国家重点实验室开放基金
关键词
载金性
碲化物
赋存状态
矿物成分
金矿物
金矿床
telluride
occurrence
chemical composition
gold carrier: Te-bearing gold ore
Dongping-type gold deposit, China
