한국해양학회지:바다 (The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY)

  • 제26권2호
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  • Pages.135-144
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  • 2021
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  • 1226-2978(pISSN)
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  • 2671-8820(eISSN)
한국해양학회 (The Korean Society of Oceanography)
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입도 분포 특성을 이용한 동해 남한국대지 시추 퇴적물 중 화산재와 황사의 구분

Discrimination of Volcanic Ash and Asian Dust (Hwangsa) in Core Sediments from the South Korea Plateau (East Sea) Using Characteristics of Grain-size Distributions

  • 이홍원 (충남대학교 자연과학대학 해양환경과학과) ;
  • 장준호 (충남대학교 자연과학대학 해양환경과학과) ;
  • 박장준 (충남대학교 자연과학대학 해양환경과학과)
  • LEE, HONG-WON (Department of Marine Environmental Science, Chungnam National University) ;
  • JANG, JUN-HO (Department of Marine Environmental Science, Chungnam National University) ;
  • BAHK, JANG-JUN (Department of Marine Environmental Science, Chungnam National University)
  • 투고 : 2021.03.10
  • 심사 : 2021.04.19
  • 발행 : 2021.05.31
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초록

동해 남한국대지 IODP Site U1430 시추 퇴적물 쇄설성 성분의 입도 자료에 대한 구성 성분 분해 결과 황사 입자와 화산재 입자를 대표하는 4개 구성 입도 집단이 구별되었다. 이 중 화산재 입자를 대표하는 2개 구성 입도 집단은 다양한 형태의 세립 및 조립 유리질 샤드들로 이루어져 있으며, 전체 입도 분포에서 0-82% 범위의 비율을 차지하고 있다. 분석된 입도 자료 중 화산재 유입 영향을 받은 자료를 제거하고 황사 입경 변화의 경향을 추출하기 위한 기준으로 화산재 구성 입도 집단 비율 33%가 적정한 것으로 판단된다.

End-member (EM) analysis of grain-size distribution data for detrital fractions of IODP Site U1430 core sediments from the South Korea Plateau (East Sea) identified 4 EMs grain-size populations (EM) which represent either Asian dusts (Hwangsa) or volcanic ashes. The two EMs representing volcanic ashes consist of fine and coarse glass shards with various morphologies and constitute 0-82% of the total grain-size distributions. The 33% mixing percentage of volcanic ash EMs seems appropriate for a cut-off value for discrimination of grain-size data influenced by volcanic ash input from those dominated by Hwangsa.

키워드

과제정보

이 연구는 국제해저지각시추사업(International Ocean Discovery Program)의 시료와 자료를 활용하였습니다. 이 연구는 충남대학교 학술연구비에 의해 지원되었습니다.

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