Adsorption of Rare Earth Metal Cations by Base Metal Sulfides in the Broken Spur and TAG Hydrothermal Fields, Atlantic Ocean

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Lithology and Mineral Resources Pub Date : 2023-04-18 DOI:10.1134/S0024490223010066
G. V. Novikov, N. V. Lobus, N. A. Shulga, O. Yu. Bogdanova
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Abstract

The article presents the results of sorption of rare earth metal (REM) cations on samples of deep-sea base metal sulfides in the Broken Spur and TAG hydrothermal fields (Mid-Atlantic Ridge). The studied samples contain the following major minerals: marcasite, pyrrhotite, pyrite, and sphalerite in the Broken Spur field; chalcopyrite, pyrite, and marcasite in the TAG field. It has been established that these Fe–Cu–Zn sulfide minerals are natural absorbents. The exchange capacity of sulfide minerals for REM cations is 0.006‒0.061 mg-equiv/g. The exchange complex of sulfide minerals comprises the cations of alkaline, alkali-earth metals, and main cations of metals in the crystal lattice – Fe, Zn, Cu (in very limited quantities). The mechanism of the REM cation absorption is ion-exchange equivalent to the exchange cations of sulfide minerals. It was found that REM cations occur in the sulfide minerals almost completely in the sorbed form (more than 90% of the total amount). Apparently, the chemically bound form is possible only for Lu and Dy cations. The mineral composition of sulfide deposits is preserved in the exchange reaction products, and new phases do not appear.

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贱金属硫化物在大西洋断刺和TAG热液中对稀土金属阳离子的吸附
本文介绍了中大西洋洋脊破碎冲和TAG热液区深海贱金属硫化物样品对稀土金属(REM)阳离子的吸附结果。研究样品中主要矿物有:破碎直冲矿区的黄铁矿、磁黄铁矿、黄铁矿和闪锌矿;黄铜矿,黄铁矿和黄铁矿在TAG领域。这些铁、铜、锌硫化物矿物是天然的吸附剂。硫化物矿物对REM阳离子的交换容量为0.006 ~ 0.061 mg-当量/g。硫化矿物的交换配合物包括碱性、碱土金属的阳离子,以及晶格中金属的主要阳离子——铁、锌、铜(数量非常有限)。REM阳离子吸收的机理是与硫化物矿物交换阳离子等效的离子交换。研究发现,快速动眼期阳离子几乎全部以吸附形式存在于硫化矿物中(占总量的90%以上)。显然,化学结合的形式只可能存在于Lu和Dy阳离子。硫化物矿床的矿物组成保存在交换反应产物中,不出现新的相。
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来源期刊
Lithology and Mineral Resources
Lithology and Mineral Resources 地学-地球化学与地球物理
CiteScore
1.30
自引率
37.50%
发文量
29
审稿时长
>12 weeks
期刊介绍: Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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