한국광물학회지 (Journal of the Mineralogical Society of Korea)

  • 제28권1호
  • /
  • Pages.51-60
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  • 2015
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  • 1225-309X(pISSN)
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  • 2288-7172(eISSN)
한국광물학회 (The Mineralogical Society of Korea)
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파키스탄 북부 Gilgit-Baltistan 지역에서 산출된 아쿠아머린의 특성 연구

Gemological Characteristics of Aquamarine from the Gilgit-Baltistan of Northern Areas, Pakistan

  • 김성재 (한양대학교 공학대학원 보석학과) ;
  • 신동욱 (한양대학교 공학대학원 보석학과) ;
  • 손수학 (한양대학교 공학대학원 보석학과) ;
  • 장윤득 (경북대학교 자연과학대학 지질학과)
  • Kim, Sung Jae (Dept. of Gemology, The Graduate School of Engineering, Hanyang University) ;
  • Shin, Dong Wook (Dept. of Gemology, The Graduate School of Engineering, Hanyang University) ;
  • Shon, Shoo Hack (Dept. of Gemology, The Graduate School of Engineering, Hanyang University) ;
  • Jang, Yun Deuk (Department of Geology, Kyungpook National University)
  • 투고 : 2015.03.02
  • 심사 : 2015.03.27
  • 발행 : 2015.03.31
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초록

파키스탄 북부 Gilgit-Baltistan에서 산출된 천연 아쿠아머린의 다른 산지와 구별되는 내포물과 분광학적 특성을 표준 보석 감정 장비와 XRF, ICP-AES, XRD, FT-IR, Raman 등을 이용해 분석한 결과 보석 광물학적 특성에 있어서는 페그마타이트 환경에서 생성되는 Mn과 결합한 탄탈라이트 결정내포물이 특징적으로 관찰되었고 분광학적 방법에 있어서는 채널 속 $H_2O$ 타입이 파키스탄과 함께 아쿠아머린 산지로 유명한 베트남, 브라질, 중국, 마다가스카르 지역의 $H_2O$ 타입-II에 비해서 타입-I에 더 근접했으며 알칼리 이온과 관련이 있는 타입-II도 다소 관찰되었다. 또한 $Na_2O$ 함량을 성분 분석한 결과 0.137 wt%로써 이 결과는 Schmetzer와 Kiefert (1990)의 에머럴드 연구에서 제안한 FT-IR 특정 피크들의 상대적 강도에 의한 알칼리 이온의 함량에 따른 분류표를 기준했을 때 $Na_2O$ 함량이 0.06-0.4 wt%이었으므로 이 $Na_2O$ 함량은 그 분류표에 없는 함량으로 그룹 II와 그룹 III 사이에 해당되므로 채널 속 Na는 주로 $H_2O-Na-H_2O$의 배열 형태를 가진 것으로 예측된다.

We applied gemological analytical approaches on Aquamarine from the Gilgit-Baltistan of Northern Areas, Pakistan. The standard gemological testing indicates that they are consistent with general characteristics of natural aquamarines. We have identified the inclusions of Tantalite-Mn by Raman analysis. It indicates that they occurs in association with the veins of Be-rich coarse pegmatite. And the results of chemical analyses, infrared absorption spectroscopy and Raman spectroscopy indicate that $H_2O$ molecules in channel mostly exist in Type-I and a little Type-II with low alkali ion. The comparison of relative peak intensity of FT-IR analysis can be used for prediction of $Na_2O$ content within not only emerald but also aquamarine.

키워드

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