交代組織と交代作用のメカニズム  [in Japanese] Replacement Texture and Mechanism of Metasomatism  [in Japanese]

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Author(s)

Abstract

Rim replacement texture is commonly observed in hydrothermal ore deposits. Examples are replacements of native bismuth by bismuthinite, ferberite by scheelite, galena by sphalerite and cassiterite by stannoidite and stannite. There are three main rate-determining mechanisms of replacement. They are surface reaction, diffusion in boundary layer and diffusion in altered layer. Theoretical considerations on these mechanisms indicate that the variations in the amount of altered product with time for each mechanism are different. Experimental study on the reaction of electrum and NaHS and Na<SUB>2</SUB>S solutions at 150°C by Nakata et al. (1994)(Resource Geol., 44, 395-407) demonstrated that surface reaction is rate determining mechanism for the formation of Ag<SUB>2</SUB>S which is the product of the reaction between electrum and NaHS solution. Such replacement experiments are necessary to clarify the mechanism of replacement and metasomatism.

Journal

  • Journal of the Mineralogical Society of Japan

    Journal of the Mineralogical Society of Japan 24(2), 117-123, 1995-04-01

    Japan Association of Mineralogical Sciences

References:  32

Codes

  • NII Article ID (NAID)
    10008767229
  • NII NACSIS-CAT ID (NCID)
    AN00084868
  • Text Lang
    JPN
  • Article Type
    REV
  • ISSN
    04541146
  • NDL Article ID
    4226716
  • NDL Source Classification
    ZM46(科学技術--地球科学--岩石・鉱物・鉱床)
  • NDL Call No.
    Z15-117
  • Data Source
    CJP  NDL  J-STAGE 
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