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笔者在鉴定我所四室地质背景组采自新疆西准噶尔达拉布特超基性岩体含单辉橄榄岩中的人工重砂样(83D—635)时,首次发现了银金矿。银金矿呈金黄色,不规则状,粒径0.1毫米,金属光泽,具延展性,不溶于盐酸,在浓硝酸溶液中于36小时后表面发黑,只局部保留金黄色光泽。后经我所七室郭炳北试金分析,Ag/Au=0.625,属银金矿无疑。与它伴生的有自然铜、黄铜矿、黄铁矿、锆石、磁铁矿、铬铁矿、铬尖晶石等近十几种副矿物。金具有比重大,亲铁、亲基性和亲硫性,所以来自地幔的物质含金量较高,金在岩浆岩中化学元素的平均含量,随着岩石基性程度的增高而增加。银和金的原子半径都为1.449,晶
The authors identified the silver-gold deposit for the first time when it was identified that the four-chamber geological background group of our institute was collected from a man-made heavy sand sample (83D-635) in a karst kyanite from the Dalbotic ultramafic rocks in the West Junggar, Xinjiang. Silver gold is golden yellow, irregular, particle size 0.1 mm, metallic luster, ductile, insoluble in hydrochloric acid, concentrated nitric acid solution in 36 hours after the surface black, only partially retain the golden yellowish luster. After the seven chamber Guo Bingbei test analysis, Ag / Au = 0.625, is a silver-gold mine no doubt. With its accompanying natural copper, chalcopyrite, pyrite, zircon, magnetite, chromite, chrome spinel nearly a dozen kinds of deputy mineral. Gold has a large proportion, pro-iron, pro-host and pro-sulfur, so the material from the mantle is high in gold content. The average content of gold in the magmatic rocks increases with the increase of the basicity of the rock. The atomic radius of silver and gold are 1.449, crystal