Formation of Oceanic Cobalt-rich Crust: Progress and Perspectives

被引：0
|
作者：
Yang Y. [1 ,2 ]
Chen H. [1 ,2 ,3 ]
机构：
[1] CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangdong, Guangzhou
[2] University of Chinese Academy of Sciences, Beijing
[3] Guangdong Provincial Key Laboratory of Mineral Physics and Minerals, Guangdong, Guangzhou
来源：
Geotectonica et Metallogenia | 2023年 / 47卷 / 01期
关键词：
cobalt-rich crust; ferromanganese oxides; future study directions; ore-forming genesis; research progress;
D O I：
10.16539/j.ddgzyckx.2021.05.022
中图分类号：
学科分类号：
摘要：
Cobalt-rich crust is an important seafloor mineral resource with unique economic value and scientific significance. Cobalt-rich crust is significantly enriched in Mn, Co, Ni, Cu, PGE (platinum group elements) and REY (rare earth elements + Y), and has special implications on the paleo-marine environmental records since the Cenozoic. Mn oxide (MnO2·xH2O) and Fe oxyhydroxide (FeOOH) are the dominant minerals that compose cobalt-rich crust, with most of them are nanoscale minerals. Vernadite and birnessite have a layer structure and a negative layer charge, which is compensated by cation sorption. The previous studies have extensively focused on the location of trace elements in minerals in the cobalt-rich crust, with the help of sequential leaching experiments, statistical analysis of element correlation, adsorption experiments and extended X-ray absorption fine structure (EXAFS) spectrum. Three main types of complexes in Mn oxide have been identified, i.e., edge-sharing (E), double-corner sharing (DC) and triple-corner sharing (TC). Studies have shown that the process of hydrogenetic cobalt-rich crust precipitation is basically inorganic colloidal-chemical and surface-chemical. Finally, we proposed some suggestions for the future research directions in this field. © 2023 Science Press. All rights reserved.
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页码：80 / 97
页数：17
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