摘要
新疆多拉纳萨依金矿位于西伯利亚和哈萨克斯坦板块缝合带西侧,是一个受韧性剪切带控制,以黄铁矿为主要金属矿物的金矿床。在详细野外调研和室内鉴定的基础上,将矿床中的黄铁矿分为4期,其中第三期黄铁矿以细小破碎晶体为主,为重要的金矿化期。对不同期次的黄铁矿分别进行了电子探针和硫同位素测试分析,并且针对重要金矿化期的黄铁矿的成分标型和硫同位素系统研究,发现该期金矿化黄铁矿化学式为FeS1.98,属硫亏型;Co/Ni的平均比值为1.488,推断该期黄铁矿为热液成因;δ34S‰值介于-3.8‰～-2.0‰,集中于幔源硫附近,说明与金密切伴生的黄铁矿中的硫主要来自深部。
Duo lanasayi gold deposit in Xin jiang is located in the west of suture between Siberian and Kazakhstan plate, controlled by ductile shear zone. Pyrite is the main metal minerals of this gold deposit. Based on detail field investigation and indoor appraisal, this paper divided pyrites of the deposit into four periods, and the third one is mainly fine grains and broken crystals, which is an important period of gold mineralization. Different peri- ods of pyrites were carried out electron microprobe and sulfur isotopic analysis, and study systematically typomor- phic composition and sulfur composition of pyrite of important period of gold mineralization. This paper gets the chemical formula for the period of pyrite： FeS1.98 ,and it is poor in sulfur. The average ratio of Co/Ni is 1. 488, inferred that the genesis of this period of pyrites is hydrothermal. δ^34S（‰）values range from -3.8 ‰--2.0‰, concentrated in the vicnity of the mantle-derived sulfur. It is indicated that sulfur of pyrite which is closely accom- panyed with gold is mainly from the deep crust.
出处
《东华理工大学学报（自然科学版）》
CAS
2012年第2期111-118,共8页
Journal of East China University of Technology(Natural Science)
基金
国家重点基础研究发展规划项目(2009CB421002)
111计划项目(B07011)
中国地质调查局综合研究项目(1212010610104)
关键词
金矿
黄铁矿
成分组成
硫同位素
新疆
gold deposit
pyrite
typomorphic composition
sulfur composition
Xinjiang
