The Journal of the Petrological Society of Korea (암석학회지)

The Petrological Society of Korea (한국암석학회)
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An Efficient Method for Zircon Separation Using the Gold Pan

선광팬을 이용한 효과적인 저어콘 분리법

  • Cheong, Wonseok (School of Earth and Environmental Sciences, Seoul National University) ;
  • Cho, Moonsup (School of Earth and Environmental Sciences, Seoul National University) ;
  • Kim, Yoonsup (Department of Earth and Environmental Science, Chungbuk National University)
  • 정원석 (서울대학교 자연과학대학 지구환경과학부) ;
  • 조문섭 (서울대학교 자연과학대학 지구환경과학부) ;
  • 김윤섭 (충북대학교 자연과학대학 지구환경과학과)
  • Received : 2012.12.15
  • Accepted : 2013.01.23
  • Published : 2013.03.31
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Abstract

We report an easy and efficient method for separating zircon grains using a gold pan and disposable sieve together with the tap water. Samples powdered to less than $230{\mu}m$ in grain size are placed on the water-filled pan tilted at about $10^{\circ}$. The outflowing water flooded with low-density particles is screened by a ${\sim}70{\mu}m$ sieve. The most efficient rate of water outflow is estimated to be 0.1 L/sec, when the distance between the tap and the surface of water-filled pan is kept at 20-25 cm. After 20-30 minutes of water outflow, heavy mineral fractions are ready for zircon collection using a hand magnet (and heavy liquid when necessary) or simply hand-picking. This procedure is most likely applicable for the separation of other heavy minerals including monazite.

우리는 선광팬, 일회용 체, 수돗물을 이용해 효과적이고 간편하게 저어콘을 분리하는 방법을 보고한다. 먼저 $230{\mu}m$ 이하로 분말화 한 시료를 약 $10^{\circ}$ 정도 기울인 선광팬에 넣고 물을 흘려보낸다. 밀도가 낮은 입자들과 더불어 선광팬으로부터 넘쳐흐른 물을 망간격이 ${\sim}70{\mu}m$인 체로 걸러낸다. 물의 공급량이 초당 0.1 리터이고 수도꼭지의 높이가 수면으로부터 20-25 cm일 때 가장 효율적으로 저어콘이 분리되었다. 수돗물을 공급한지 20-30분 정도 지나면 다음 작업인 자력 분리(필요시 중액 분리) 또는 저어콘 수선별을 진행할 수 있을 만큼 중광물들이 팬에 모인다. 이 방법은 중액을 사용하는 고전적 방법에 비해 안전하며, 저어콘 뿐만 아니라 모나자이트와 같은 다른 중광물의 분리에도 사용될 수 있다.

Keywords

References

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