含硫化物尾矿中铁、铅、铜次生矿物的形成顺序、电化学反应及理化模型(Talmovskie Sands, Salaire, Russia)

IF 0.7 Q4 GEOSCIENCES, MULTIDISCIPLINARY
A. Khusainova, S. Bortnikova, O. Gaskova, S. Volynkin, Y. Kalinin
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引用次数: 0

摘要

本文介绍了萨莱尔矿田重晶石多金属矿富集尾矿在对比物化条件下形成的次生矿物Fe、Pb、Cu的组成和形态研究结果。矿石的复杂矿物组成(黄铁矿、黄铜矿、闪锌矿、方铅矿、辉钼矿)和物质的长期化学风化作用形成了单矿物和分带次生镶边和粒间充填物,并利用现代研究方法进行了鉴定。其中以铅黄钾铁矾、角菱石、铜矾和氢氧化铁为主;焦闪石、金晶石和绒粒石较少出现。热力学建模的方法被用来解决逆向问题——恢复导致二次矿物组合变化的溶液组成。正在进行的过程的性质不仅可以通过化学相互作用来表征,而且可以通过所考虑的系统中的电化学反应来表征,其中各种矿物成分作为电偶,结合介质的物理化学参数(pH, Eh,溶液的离子组成),导致原始矿物的逐步或不完全氧化,随后选择性沉积次生化合物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Secondary minerals of Fe, Pb, Cu in sulfide-containing tailings: sequence of formation, electrochemical reactions and physico-chemical model (Talmovskie Sands, Salaire, Russia)
The results of studies of the composition and form of secondary minerals Fe, Pb, Cu, formed under contrasting physico-chemical conditions of the accumulated tailings from the enrichment of barite-polymetallic ores of the Salair ore field, are presented. The complex mineral composition of ores (pyrite, chalcopyrite, sphalerite, galena, fahlore) and long-term processes of chemical weathering of the substance contributed to the formation of monomineral and zonal secondary rims and fillings of the intergranular space, which were identified using modern research methods. Plumbojarosite, anglesite, cerussite, and iron hydroxides predominate among them; pyromorphite, ginsdalite, and covellite occur less frequently. The method of thermodynamic modeling was used to solve the inverse problem - the restoration of the composition of solutions that led to a change in the associations of secondary minerals. The nature of the ongoing processes can be characterized not only by chemical interactions, but also by electrochemical reactions in the systems under consideration, where various mineral components act as galvanic pairs, which, in combination with the physico-chemical parameters of the medium (pH, Eh, ionic composition of solutions ), leads to stepwise or incomplete oxidation of the original minerals with subsequent selective deposition of secondary compounds.
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来源期刊
Russian Journal of Earth Sciences
Russian Journal of Earth Sciences GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
1.90
自引率
15.40%
发文量
41
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