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New Data on the Conditions of the Formation of Gold Mineralization in the Drazhnoe Deposit, the Republic of Sakha (Yakutia): Evidence from the Study of Fluid Inclusions
Moscow University Geology Bulletin ( IF 0.3 ) Pub Date : 2021-06-22 , DOI: 10.3103/s0145875221020113
D. V. Sivkov , V. Yu. Prokof’ev , V. Yu. Chikatueva

Abstract

New results of thermobarogeochemical studies show that quartz veins in the Drazhnoe deposit were formed under mesozonal conditions at a depth of 3–9 km from heterogeneous carbon dioxide–aqueous fluids with a low concentration of brines and high contents of CO2, which is typical of ore-forming fluids in orogenic vein gold deposits. Based on the phase composition, three types of fluid inclusions are distinguished: (1) carbon dioxide–aqueous; (2) gaseous, filled with dense carbon dioxide; and (3) a two-phase gas–liquid of aqueous–brine solutions. Na, Mg, and Fe chlorides predominated in the ore-forming fluids. It is assumed that the fluids migrated along the regional Adycha–Taryn shear zone and were uplifted to the Earth’s surface at a supra-lithostatic pressure, which was followed by precipitation of ore elements and the formation of quartz veins during tectonic movements along shear zones.



中文翻译:

萨哈共和国(雅库特)德拉日诺矿床金矿化条件的新数据:流体包裹体研究的证据

摘要

热压地球化学研究的新结果表明,Drazhnoe 矿床中的石英脉是在中带条件下形成的,位于 3-9 公里深度的非均质二氧化碳 - 含低浓度盐水和高 CO 2含量的水相流体,这是典型的造山脉金矿床成矿流体。根据相组成,流体包裹体可分为三种类型:(1)二氧化碳-水相;(2)气态,充满浓密的二氧化碳;(3) 两相气-液的水溶液-盐水。Na、Mg 和 Fe 的氯化物在成矿流体中占主导地位。假设流体沿着区域 Adycha-Taryn 剪切带运移,并在超岩石静压下抬升到地球表面,随后在沿剪切带的构造运动期间发生矿石元素沉淀和石英脉的形成。

更新日期:2021-06-22
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