外帯花崗岩変質帯に生じた黄褐色draviteに伴われるF-draviteおよびF-uvite相

國枝 拓司; 皆川 鉄雄; 梅村 直宏; 稲葉 幸郎

doi:10.14824/jakoka.2013.0_72

2013 Annual Meeting of Japan Association of Mineralogical Sciences

Session ID : R1-P09

DOI https://doi.org/10.14824/jakoka.2013.0_72

Conference information

Host: Japan Association of Mineralogical Sciences

R1: Characterization and description of minerals

Fluor-dravite and Fluor-uvite phase accompanied by yellow-brown dravite from alteration zones of granitic rocks, Outer-zone

*Hiroshi Kunieda, Tetsuo Minakawa, Naohiro Umemura, Sachio Inaba

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Keywords: dravite, Fluor-dravite, Fluor-uvite, uvite, tourmaline-supergroup mineral

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Abstract

Fluor-dravite, F bearing boron silicate mineral, was found from the Zennki mountain area, Nara Prefecture. The empirical formula of fluor-dravite is (Na_0.51Ca_0.39)_∑0.90(Mg_2.81Fe²⁺_0.14Ti_0.05)_∑3.00(Al_5.53Mg_0.26)_∑5.80(BO₃)₃Si_5.74O₁₈(OH)₃(F_0.76OH_0.24). And fluor - uvite (Ca_0.57Na_0.36)_∑0.93(Mg_3.16Fe²⁺_0.17Ti_0.05)_∑3.00(Al_5.53Mg_0.26)_∑5.80(BO₃)₃Si_5.74O₁₈(OH)₃(F_0.76OH_0.24). Range of F content is 0.96 to 1.63 wt%.

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