Textural and geochemical characteristics of Fe-Mn crusts from four seamounts near the Marshall Islands, western Pacific
Cited 6 time in
WEB OF SCIENCE
Cited 9 time in
- Textural and geochemical characteristics of Fe-Mn crusts from four seamounts near the Marshall Islands, western Pacific
- 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)
- 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.
- Geosciences Journal, v.9, no.4, pp.331 - 338, 2005
- Ferromanganese crust; Inter-Tropical Convergence Zone; Paleoceanography; Phosphatization; Western Pacific
- Related Researcher
Deep seabed exploration,Geochemistry,심해저자원탐사,지화학
- Files in This Item:
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.