Gaspeite, glaukosphaerite, mcguinessite and jamborite in serpentinites from Shinshiro City, Aichi Prefecture, Japan.

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  • 愛知県新城市産蛇紋岩中gaspeite, glaukosphaerite, mcguinessiteおよびjamborite

Abstract

Gaspeite, glaukosphaerite, mcguinessite, and jamborite were found in the old gallery of the Nakauri mine, Shinshiro City, Aichi Prefecture, central Japan. The last one was also found in a quarry at Kamewari Pass nearby the mine. Gaspeite is cobaltian with Co/(Ni+Co)=0.28-0.31 and greyish pink in colour despite Ni>Co in mole ratio. Glaukosphaerite has Ni/(Ni+Cu)=0.42-0.49 and CoO up to 5 wt. %. Cobaltian varieties of these species are new to them. Mg/(Mg+ Cu) in mcguinessite ranges 0.61 to 0.65, which is higher than those of the originally described material. Jamborite from Kamewari Pass has Fe/(Fe+Ni)=0.29-0.32, extending the compositional range to Fe-rich side. All of them are thin crustification on fracture walls cutting serpentinite genetically responsible for circulating meteoritic water. Metallic elements in these minerals seem to owe the origin to the underlying nickel-bearing serpentine, heazlewoodite, cobaltpentlandite, and djurleite. The substitution relation of Co2+ for Ni2+ in these carbonates ggets the similarity of their geochemical behaviours under the condition in old galleries, where such solid solutions were readily formed.

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Details 詳細情報について

  • CRID
    1390282681194172672
  • NII Article ID
    130003884761
  • DOI
    10.2465/ganko.88.517
  • ISSN
    18813275
    09149783
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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