Research progresses and main scientific issues of                         strategically critical minerals in black rock series

WEN, Han-jie; ZHOU, Zheng-bing; MA, Wan-ping; ZHU, Yu

doi:10.3724/j.issn.1007-2802.20240008

Cited by 1 publication

(1 citation statement)

References 180 publications

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“…In addition, black rock series-type deposits are distributed in NWW-SEEtrending rift basins and are consistent with the stratigraphic orientation. It can be inferred that the formation of a black rock series is closely related to faults, which may form small depressions with local enclosed anoxic conditions for the descending plates of different faults and which is conducive to the accumulation and evolution of organic matter [58,82]. In addition, the Se content in carbonaceous siliceous rocks and carbonaceous shale is higher than that in siliceous rocks, which may be related to the adsorption and protection effect of organic matter on the Se element [47,80,83].…”

Section: Se Geochemical Enrichment Mechanism and Heavy-mineral Sourcesmentioning

confidence: 99%

Mineralogy and Selenium Speciation Analysis of Early Cambrian Selenium-Rich Black Shale in Southern Shaanxi Province, China

Feng,

Liu,

Song

et al. 2024

Minerals

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Selenium (Se) is an essential trace element for humans and animals, and an excess of or deficiency in Se is harmful to health. Research on the selenium enrichment zone began in the late 1970s in Shuang’an, Ziyang, southern Shaanxi Province. Naore village is only one selenosis area in Shuang’an, Ziyang, China. Different scholars have conducted systematic studies on the occurrence of selenium, its organic geochemistry and biomarkers, and its content and enrichment patterns in this area. This study applied the TIMA (TESCAN integrated mineral analyzer) for the first time to conduct detailed mineralogical work. The minerals included quartz, carbonate minerals (calcite and dolomite), feldspar (plagioclase, albite, and orthoclase), biotite and muscovite, clay minerals (chlorite and kaolinite), hematite, pyrite, and accessory minerals (almandine, olivine, zircon, and apatite) in Naore village, Ziyang, Shaanxi Province. The ATi index (100 × apatite/(apatite + tourmaline)) is used to determine the source of heavy minerals and the degree of heavy minerals’ weathering. The content POS (100 × (pyroxene + olivine + spinel)/transparent heavy mineral) of olivine, pyroxene, and spinel in heavy minerals can reflect the contribution of basic and ultrabasic rocks in the source area. The ATi and POS indexes for the heavy minerals in the research area were 91.83~99.96 and 0.01~18.75, respectively, reflecting the abundance of volcanic rock material in their source. In addition, the migration, transformation, bioavailability, and toxicity of selenium in the environment are closely related to its species. The species of selenium in various selenium-rich areas (Naore, Wamiao, and Guanquan) mainly include unusable residues and organic forms, followed by humic-acid-bound selenium. The proportions of water-soluble, exchangeable, and carbonate-bound selenium are relatively small, and the proportion of Fe-Mn oxide-bound selenium is the lowest.

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Section: Se Geochemical Enrichment Mechanism and Heavy-mineral Sourcesmentioning

confidence: 99%

Mineralogy and Selenium Speciation Analysis of Early Cambrian Selenium-Rich Black Shale in Southern Shaanxi Province, China

Feng,

Liu,

Song

et al. 2024

Minerals

View full text Add to dashboard Cite

show abstract

Research progresses and main scientific issues of strategically critical minerals in black rock series

Cited by 1 publication

References 180 publications

Mineralogy and Selenium Speciation Analysis of Early Cambrian Selenium-Rich Black Shale in Southern Shaanxi Province, China

Mineralogy and Selenium Speciation Analysis of Early Cambrian Selenium-Rich Black Shale in Southern Shaanxi Province, China

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