Abstract— The paper presents newly acquired data on the mineral and chemical composition of the crystal surface layers of arsenopyrite and pyrite from the Natalkinskoe gold deposit, northeastern Russia. Data on arsenopyrite and pyrite grains from metasomatites and from quartz veins and veinlets were obtained using a scanning electron microscope equipped with an energy dispersive X-ray spectrometer (SEM-EDX). The surface layers of the sulfide crystals from the metasomatites contain no admixtures, except only As (up to 2.48 wt %) in the pyrite. The surface layers of arsenopyrite crystals from the vein and veinlets contains the following admixtures (wt %): Pt (up to 2.11), U (up to 2.03), Hg (up to 1.11), Au (up to 0.96), and more rarely Ru (up to 1.44), Ir (up to 0.67), Os (up to 0.64), Ag (up to 0.71), and Cu (up to 0.56). The surface layers of the pyrite crystals contain (wt %): As (up to 2.24), Pt (up to 2.88), and Cu (up to 0.69). The detected elevated concentrations of the admixtures are thought to be explained primarily by the presence of nonautonomous phases.

中文翻译：

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俄罗斯东北部 Natalkinskoe 矿床毒砂和黄铁矿表面的扫描电镜研究

摘要——本文介绍了俄罗斯东北部 Natalkinskoe 金矿床毒砂和黄铁矿晶体表层的矿物和化学成分的新获得数据。使用配备能量色散 X 射线光谱仪 (SEM-EDX) 的扫描电子显微镜获得了来自交代岩和石英脉和细脉的毒砂和黄铁矿颗粒的数据。交代岩中硫化物晶体的表层不含任何外加剂，黄铁矿中仅含有 As（高达 2.48 重量%）。来自脉和细脉的毒砂晶体的表层包含以下混合物（重量百分比）：Pt（高达 2.11）、U（高达 2.03）、Hg（高达 1.11）、Au（高达 0.96）等很少有 Ru（高达 1.44）、Ir（高达 0.67）、Os（高达 0.64）、Ag（高达 0.71）和 Cu（高达 0.56）。黄铁矿晶体的表层含有（wt%）：As（高达 2.24）、Pt（高达 2.88）和 Cu（高达 0.69）。检测到的混合物浓度升高被认为主要是由非自主相的存在来解释的。