論文

査読有り
2015年

Global lithium resources -Overview of various deposit types and ore genesis inferred from lithium isotopes?

Japanese Magazine of Mineralogical and Petrological Sciences
  • Daisuke Araoka

44
5
開始ページ
259
終了ページ
270
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2465/gkk.150206
出版者・発行元
Japanese Association of Mineralogists Petrologists and Economic Geologists

Lithium, one of the rare metals defined by Japanese government, is industrially important, and Li compounds are used for many purposes (e.g., Li-ion batteries). The major types of lithium deposits are (1) brine, (2) pegmatite, and (3) sedimentary deposits. Because of the low production costs for Li in brine deposits, they account for approximately 60- of identi- fied worldwide Li resources and for approximately 70? of worldwide Li production. Recent increases in Li production, an expected high demand for its use in eco-friendly cars, and uneven distribution of Li-producing countries underline the importance of maintaining a stable Li supply. Therefore, more brine deposits should be exploited, and the development of other types of Li deposits should be explored. Lithium carbonate is extracted from brine deposits in playas and salt crusts by exploiting the solubility diŠerences of diŠerent ionic compounds. Li-rich brine deposits probably form by orographic/topographic eŠects and by local hydrothermal activity, because Li is a ‰uid- mobile element and its elution from solids into ‰uids is temperature dependent. Lithium- pegmatite deposits probably form by intermittent intrusions of pegmatite magma in which Li has become concentrated by the addition of Li-rich diŠerentiates from felsic magma, because Li is a moderately incompatible element. Sedimentary-type Li deposits, which are composed of hectorite and jadarite, are still relatively undeveloped, but they are attracting a great deal of attention as possible new Li resources. In addition to these sources, methods to extract Li from seawater and to reclaim Li by urban mining of discarded products have also been examined. Lithium isotope analysis is a powerful tool for tracing water-rock interactions and for investigating various geochemical and geological processes. Moreover, the origin of Li and the history of Li accumulation in Li deposits can often be determined from its isotopic signature.

リンク情報
DOI
https://doi.org/10.2465/gkk.150206
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-84980350930&partnerID=MN8TOARS
URL
http://orcid.org/0000-0001-5249-4995

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