Borcarite from Fuka, Okayama Prefecture, Japan.

• KUSACHI Isao

  Department of Earth Sciences, Faculty of Education, Okayama University

• TAKECHI Yasushi

  Department of Earth Sciences, Faculty of Education, Okayama University

• HENMI Chiyoko

  Department of Earth Sciences, Faculty of Science, Okayama University

• KOBAYASHI Shoichi

  Division of Earth Sciences, Kurashiki University of Science and the Arts

Abstract

Borcarite was found in a vein cavity which developed along the boundary between crystalline limestone and gehlenite-spurrite skarns at Fuka, Okayama Prefecture, Japan. Borcarite occurs as scattered prismatic intergrowths and euhedral crystals up to 5 mm long and 3 mm wide on the cavity wall, in association with olshanskyite, bultfonteinite and calcite. Wet chemical analyses and EPMA of the mineral yield an empirical formula Ca_3.944(Mg_0.815 Fe_0.089)_Σ0.904B_3.981O_5.705(OH)_6.097(CO₃)_2.066 on me basis of O = 18. The DTA and TG curves, IR spectrum and X-ray diffraction properties agree well with previous data.<BR>It is likely that borcarite was formed as a secondary mineral from brucite in a reaction with late-hydrothermal solution.

Journal

• Mineralogical Journal

  Mineralogical Journal 19 (3), 115-122, 1997

  Japan Association of Mineralogical Sciences

Keywords

• General Earth and Planetary Sciences
• General Environmental Science

Details

• CRID: 1390001206545356416
• NII Article ID: 130004485185
• NII Article ID: 30027161542
• NII Book ID: AA00739590
• DOI: 10.2465/minerj.19.115
• ISSN: 18814174
• ISSN: 05442540
• ISSN: http://id.crossref.org/issn/05442540
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed