Textural and geochemical characteristics of Fe-Mn crusts from four seamounts near the Marshall Islands, western Pacific SCIE SCOPUS KCI

Cited 6 time in WEB OF SCIENCE Cited 9 time in Scopus
Title
Textural and geochemical characteristics of Fe-Mn crusts from four seamounts near the Marshall Islands, western Pacific
Author(s)
Kim, J.; Hyeong, K.; Yoo, C.M.; Moon, J.-W.; Kim, K.-H.; Ko, Y.-T.; Lee, I.
KIOST Author(s)
Kim, Jonguk(김종욱)Hyeong, Kiseong(형기성)Yoo, Chan Min(유찬민)Moon, Jai Woon(문재운)Ko, Youngtak(고영탁)
Publication Year
2005-12
Abstract
Textural and geochemical properties of ferromanganese crust (Fe-Mn crust) samples from four adjacent seamounts near the Marshall Islands were investigated to delineate the paleoceanographic condition on their growth history. The Fe-Mn crust samples of this study show four distinct layers (layers 1 to 4 from top to bottom). The uppermost layer 1 is massive and black, and is enriched in hydrogenetic elements such as Mn, Co, Ni, and Mo. The next layer 2 is porous and filled with sediment. Detrital (Al, Rb, and Ti) and biogenic (Cu, Zn, and Ba) elements are enriched in layer 2. The layers 3 and 4 are phosphatized layers which are impregnated with carbonate fluorapatite (CFA), and therefore their primary mineralogy and geochemistry were not preserved. The property of layer 2 suggested that this layer had grown under the condition of high biogenic and detrital flux. Such a condition may be met in the Inter-tropical Convergence Zone (ITCZ) where the northeast and southeast trade winds meet Considering the present location and paleotracking of seamounts, layer 2 appears to have formed when these seamounts were beneath the ITCZ. On the other hand, layer 1 may have started to grow after the seamounts moved out of the ITCZ with the northwestward movement of the Pacific plate. Our study indicates that the Fe-Mn crusts can be used to trace the paleolocation of ITCZ when precise age determination and information on the plate movement are provided.
ISSN
1226-4806
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5000
DOI
10.1007/BF02910321
Bibliographic Citation
Geosciences Journal, v.9, no.4, pp.331 - 338, 2005
Publisher
한국지질과학협의회
Keywords
Ferromanganese crust; Inter-Tropical Convergence Zone; Paleoceanography; Phosphatization; Western Pacific
Type
Article
Language
English
Document Type
Article
Publisher
한국지질과학협의회
Related Researcher
Research Interests

Deep seabed exploration,Geochemistry,심해저자원탐사,지화학

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