Abstract

The analysis of features of the geological structure of the Adycha gold placer region shows that flat structures of the early collision stage control the setting of the ore fields. The ores are similar to host rocks in the main components, lithofile trace elements, and REEs. The features of the trace-element pattern and indicative ratios agree with the suggested metamorphic origin of the main volume of fluids, their weakly reduced and almost neutral conditions, and sorption rock–fluid interaction. A group of elements, the distribution of which is significantly distinct from those of the host rocks, is determined. The geochemical type of the ore region is caused by Mo, Au, Bi, and Sb, the contents of which are higher in all studied ore objects. Chromium, As, Pb, and Te are present in all ore fields, but not in all objects. The Co–Ni–W–Zn–Cd–Ag, Co–Ni–W–In–Mn–Cu–Sr, and Sn–In–Mn–Cu–Zn–Cd–Sr–Ag associations supplement the geochemical type of the Delyuvial’ny, Lazo, and Sentachan ore fields, respectively. Our studies along with thermobarogeochemical data refine the metamorphic–magmatic model of the formation of the gold–quartz deposits of the Kular–Nera belt and outline approaches for the practical application of these features.

中文翻译：

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Adycha矿区（俄罗斯东雅库特）的造山金矿化：金-石英矿石的地质环境和地球化学特征

摘要

对阿迪恰金砂矿床地质结构特征的分析表明，早期碰撞阶段的扁平结构控制了矿场的设置。矿石的主要成分，岩石锉痕量元素和稀土元素与主岩相似。痕量元素模式的特征和指示比率与流体主要体积的变质成因，其弱还原和几乎中性的条件以及吸附岩-流体相互作用相吻合。确定了一组元素，这些元素的分布与基岩的分布明显不同。矿石区域的地球化学类型是由Mo，Au，Bi和Sb引起的，其含量在所有研究的矿石中都较高。铬，砷，铅和碲存在于所有矿场中，但并非存在于所有物体中。Co–Ni–W–Zn–Cd–Ag，Co–Ni–W–In–Mn–Cu–Sr和Sn–In–Mn–Cu–Zn–Cd–Sr–Ag协会分别补充了Delyuvial'ny，Lazo和Sentachan矿场的地球化学类型。我们的研究连同热化学地球化学数据一起完善了Kular-Nera带金-石英矿床形成的变质岩浆模型，并概述了这些特征的实际应用方法。