중앙태평양 마이크로네시아 군도 해저산 일원에서 발견되는 탄산염암의 속성작용

This study was carried out to investigate the composition and diagenesis of the carbonate rocks from the seamounts in the Federated States of Micronesia, Central Pacific. Most of the samples were dredged from the water depth of about 1000-3000 m mainly in Chuuk Island, Hunter Bank, Caroline Ridge an...

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Published inPada (Hanʼguk Haeyang Hakhoe) Vol. 3; no. 4; pp. 214 - 227
Main Authors 우경식, 최윤지, 이경용, 강정극, 박병권, Woo, Kyung-Sik, Choi, Yoon-Ji, Lee, Kyeong-Yong, Kang, Jung-Keuk, Park, Byong-Kwong
Format Journal Article
LanguageKorean
Published 1998
Online AccessGet full text
ISSN1226-2978
2671-8820

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Abstract This study was carried out to investigate the composition and diagenesis of the carbonate rocks from the seamounts in the Federated States of Micronesia, Central Pacific. Most of the samples were dredged from the water depth of about 1000-3000 m mainly in Chuuk Island, Hunter Bank, Caroline Ridge and Yap Trench. The carbonate rocks are either pelagic sediment mainly of planktonic foraminifera or shallow-marine sediment of corals, calcareous algae, mollusks and echinoderms. The rocks are altered texturally and chemically, except for those from the Hunter Bank and Yap A. The presence of shallow-marine cements suggests that the carbonate sediment has been subsided or reworked to the present water depth after deposition in shallow-marine environments. The texture of the carbonate sediment is reminiscent of meteoric diagenesis; however, the stable carbon isotopic composition of the altered rock samples shows affinity with that of sea water and the oxygen isotopic values are slightly enriched or same as compared to those of unaltered samples. These stable isotopic data suggest that the carbonate sediment of the study area has been diagenetically altered in the present deep-marine environment. 중앙태평양 마이크로네시아 군도 해저산 일원에서 발견되는 탄산염암의 구성성분과 속성작용을 이해하기 위하여 조직적, 지화학적 연구를 수행하였다. 연구지역은 Caroline 해령, Chuuk 섬, Hunter 뱅크, Yap 해구 일대이며, 대부분의 시료들은 수심 약 1,000~3,000 m 깊이에서 준설된 것들이다. 연구지역에서 발견되는 탄산염암은 부유성 유공충으로 이루어진 원양성 퇴적물과 산호, 석회조류, 연체동물 및 극피류 등으로 이루어진 천해퇴적물의 두 종류가 있다. 이들 퇴적물은 Hunter 뱅크와 Yap A 지역을 제외하고는 모두 조직적, 화학적 속성변질을 받았다. 천해기원 교질물들이 발견되므로, 천해에서 퇴적된 후 현재의 깊이로 침강되었거나 재동된 것으로 사료된다. 조직 특성은 천수에 의한 속성변질산물과 매우 유사한 양상을 보여주나, 변질된 시료의 탄소동위원소는 해수기원 탄소의 특성을 보여주며, 산소동위원소는 변질되지 않은 시료와 같거나 부화된 값을 보여준다. 따라서 이 지역의 탄산염암은 심해의 해수에 의해 변질되었음을 알 수 있다.
AbstractList This study was carried out to investigate the composition and diagenesis of the carbonate rocks from the seamounts in the Federated States of Micronesia, Central Pacific. Most of the samples were dredged from the water depth of about 1000-3000 m mainly in Chuuk Island, Hunter Bank, Caroline Ridge and Yap Trench. The carbonate rocks are either pelagic sediment mainly of planktonic foraminifera or shallow-marine sediment of corals, calcareous algae, mollusks and echinoderms. The rocks are altered texturally and chemically, except for those from the Hunter Bank and Yap A. The presence of shallow-marine cements suggests that the carbonate sediment has been subsided or reworked to the present water depth after deposition in shallow-marine environments. The texture of the carbonate sediment is reminiscent of meteoric diagenesis; however, the stable carbon isotopic composition of the altered rock samples shows affinity with that of sea water and the oxygen isotopic values are slightly enriched or same as compared to those of unaltered samples. These stable isotopic data suggest that the carbonate sediment of the study area has been diagenetically altered in the present deep-marine environment. 중앙태평양 마이크로네시아 군도 해저산 일원에서 발견되는 탄산염암의 구성성분과 속성작용을 이해하기 위하여 조직적, 지화학적 연구를 수행하였다. 연구지역은 Caroline 해령, Chuuk 섬, Hunter 뱅크, Yap 해구 일대이며, 대부분의 시료들은 수심 약 1,000~3,000 m 깊이에서 준설된 것들이다. 연구지역에서 발견되는 탄산염암은 부유성 유공충으로 이루어진 원양성 퇴적물과 산호, 석회조류, 연체동물 및 극피류 등으로 이루어진 천해퇴적물의 두 종류가 있다. 이들 퇴적물은 Hunter 뱅크와 Yap A 지역을 제외하고는 모두 조직적, 화학적 속성변질을 받았다. 천해기원 교질물들이 발견되므로, 천해에서 퇴적된 후 현재의 깊이로 침강되었거나 재동된 것으로 사료된다. 조직 특성은 천수에 의한 속성변질산물과 매우 유사한 양상을 보여주나, 변질된 시료의 탄소동위원소는 해수기원 탄소의 특성을 보여주며, 산소동위원소는 변질되지 않은 시료와 같거나 부화된 값을 보여준다. 따라서 이 지역의 탄산염암은 심해의 해수에 의해 변질되었음을 알 수 있다.
Author Woo, Kyung-Sik
이경용
Kang, Jung-Keuk
최윤지
강정극
박병권
Park, Byong-Kwong
Lee, Kyeong-Yong
Choi, Yoon-Ji
우경식
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