Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Mineralogical Characterization of Buserite from the Janggun and Dongnam Mines, Korea

장군광산과 동남광산에서 산출되는 부서라이트의 광물학적 특성

  • Choi, Hun-Soo (Petroleum & Marine Resources Research Division, KIGAM) ;
  • Kim, Soo-Jin (School of Earth and Environmental Sciences, Seoul National University) ;
  • Kim, Jeong-Jin (Department of Earth and Environmental Sciences, Andong National University)
  • 최헌수 (한국자원연구원 해저자원연구부) ;
  • 김수진 (서울대학교 지구환경과학부) ;
  • 김정진 (안동대학교 지구환경과학과)
  • Published : 2005.12.01
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Abstract

X-ray diffraction (XRD), Electron microprobe analyses (EPMA) and heating experiments were used for mineralogical characterization of natural buserites collected from the Janggun and Dongnam mines. They are closely associated with $7-{\AA}$ phase (usually rancieite) in manganese oxide ores of the supergene oxidation zones of manganese carbonate deposits. Electron microprobe analyses give the average formula $(Ca_{0.78}Mg_{0.64}Mn^{2+}\;_{0.45})Mn^{4+}\;_{8.03}O_{18}\cdot13.2H_{2}O\;and\;(Zn_{0.81}Ca_{0.77}Mg_{0.26})Mn^{4+}\;_{8.00}O_{18}\cdot10.9H_{2}O$ for buserite from the Janggun and the Dongnam mine, respectively. The basal reflection of buserite from the Janggun mine shifts continuously from $9.86\;{\AA}\;at\;40^{\circ}C\;to\;7.60\;{\AA}\;at\;90^{\circ}C$, but the buserite from the Dongnam mine shows tendency of decreasing intensity in the $9.67^{\circ}C$ peak and of increasing intensity in the $7.53\;{\AA}$ peak in the range of $40\∼90^{\circ}C$, showing no gradual shifting of peaks.

장군광산과 동남광산에서 산출되는 부서라이트에 대한 광물학적 특성을 연구하기 위하여 X-선 회절분석, 전자현미분석, 열분석 실험을 실시하였다. 장군 광산과 동남 광산에서의 부서라이트는 망간탄산염광상의 표성 산화 작용에 의해 형성된 산화망간 광석 내에 란시아이트와 함께 산출된다. 전자현미분석결과 장군광산 부서라이트의 화학 조성은 ($Ca_{0.78}Mg_{0.64}Mn^{2+}_{0.45})Mn^{4+}_{8.03}O_{18}\cdot13.2H_{2}O$이며 동남광산에서 산출되는 부서라이트는 ($Zn_{0.81}Ca_{0.77}Mg_{0.26}Mn^{4+}_{8.00}O_{18}\cdot10.9H_{2}O$이다. 장군광산의 부서라이트의 저면 격자 간격은 $40^{\circ}C$에서 $9.86\;{\AA}$이며, $90^{\circ}C$에서는 $7.60\;{\AA}$로 온도가 상승함에 따라 점진적으로 감소한다. 그러나 동남광산에서 $40^{\circ}C$부터 $90^{\circ}C$까지의 온도가 변화함에 따라 점진적인 회절선의 이동은 나타나지 않고 $9.67\;{\AA}$의 회절선의 강도는 감소하고 $7.53\;{\AA}$의 회절강도는 증가하는 경향을 보여준다.

Keywords

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