以下文章来源于Geoscience Frontiers
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高分辨率3D X射线
计算机断层扫描仪
含金毒砂
哈萨克斯坦东部Suzdal
俄罗斯Olympiada和Bazovskoe
造山型金矿床
本文研究了Suzdal（哈萨克斯坦东部）、Olympiada（俄罗斯Yenisei山脉）的黄铁矿-毒砂组合的小型针状毒砂和Bazovskoe（俄罗斯Yakutia）的大型菱柱状毒砂中金的分布。亚洲东北部主要产于黑色页岩中的造山型金矿床分为两个产矿阶段，对应于两种形态的毒砂。在早期阶段，细粒针-棱柱状毒砂中含有不可见的金；在晚期阶段，形成了与自由可见金相结合的板状毒砂。使用扫描电子显微镜、电子探针分析、原子吸收和激光剥蚀电感耦合等离子体质谱联用高分辨率3D X射线计算机断层扫描（HRXCT）对含金毒砂样品进行了分析。在研究过程中，HRXCT不会破坏所研究的矿物。该技术可以估计矿物或母岩中金包裹体的数量，并得出有关矿石金含量的合理结论，详细研究金属包裹体的分布模式（与某些矿物、裂缝、晶体生长面等有关）并确定黄金的形态。它可用于了解矿物组合的起源，并制定黄金提取的最佳技术方案。Combined study of Au-bearing arsenopyrite of orogenic gold deposits (NE Asia): High resolution 3D X-ray computed tomography, LA-ICP-MS, and EMPA dataEvgeny Naumov, Yuri Kalinin, Galina Palyanova, Lyudmila Kryuchkova, Viacheslav Voitenko, Vera Abramova, Franco Pirajnohttps://doi.org/10.1016/j.gsf.2024.101953The distribution of gold in small acicular arsenopyrite of a pyrite-arsenopyrite association from Suzdal (Eastern Kazakhstan), Olympiada (Yenisei Ridge, Russia) and large pseudorhombic arsenopyrite crystals from Bazovskoe (Yakutia, Russia) orogenic-type deposits were investigated. On orogenic gold deposits in NE Asia, occurring mainly in black shales, two productive stages of ore deposition are distinguished, which correspond to two morphological varieties of arsenopyrite. At the early stage, fine-grained acicular-prismatic arsenopyrite with invisible gold was deposited; at the late stage, tabular arsenopyrite in association with free visible gold was formed. The samples of gold-bearing arsenopyrite were analyzed using Scanning Electron Microscopy, Electron Microprobe Analyses, Atomic Absorption and Laser Ablation Inductively Coupled Plasma Mass Spectrometry in combination with High Resolution 3D X-ray Computed Tomography (HRXCT). HRXCT does not destroy the studied mineral during the investigation. That technique permits to do an estimation of the amount of gold inclusions in minerals or host rocks and draw reasonable conclusions about the gold content of the ores, to study in detail the distribution patterns of metal inclusions (associated with certain minerals, cracks, crystal growth faces, etc.) and to determine the form of the gold. It can be used to understanding of the genesis of productive mineral associations, and to developing optimal technological schemes for gold extraction.主办/《地学前缘（英文）》编辑部
