Composition of rare earth elements in northeast pacific surface sediments, and their potential as rare earth elements resources SCOPUS KCI

Title
Composition of rare earth elements in northeast pacific surface sediments, and their potential as rare earth elements resources
Author(s)
Seo, I.; Pak, S.J.; Kiseong, H.; Kong, G.-S.; Kim, J.
KIOST Author(s)
Pak, Sang Joon(박상준)Hyeong, Kiseong(형기성)Kim, Jonguk(김종욱)
Publication Year
2014
Abstract
The surface sediments from the manganese nodule exploration area of Korea in the Clarion-Clipperton fracture zone were investigated to understand the resource potential of and emplacement mechanism for rare earth elements (REEs). The sediments are categorized into three lithological units (Unit I, II and III from top to bottom), but into two groups (Unit I/II and Unit III) based on the distribution pattern of REEs. The distribution pattern of REEs in Unit I/II is similar to that of Post-Archean Australian Shale (PAAS), but shows a negative Ce anomaly and enrichment in heavy REEs (HREEs). In Unit III, the HREE enrichment and Ceanomaly is much more remarkable than Unit I/II when normalized to PAAS, which are interpreted as resulting from the absorption of REEs from seawater by Fe oxyhydroxides that were transported along the buoyant plume from remotely-located hydrothermal vents. It is supported by the PAAS-normalized REE pattern of Unit III which is similar to those of seawater and East Pacific Rise sediments. Meanwhile, the PAAS-normalized REE pattern of Unit I/II is explained by the 4:1 mixing of terrestrial eolian sediment and Unit III from each, indicating the much smaller contribution of hydrothermal origin material to Unit I/II. The studied sediments have the potentiality of a low-grade and large tonnage REE resource. However, the mining of REE-bearing sediment needs a large size extra collecting, lifting and treatment system to dress and refine low-grade sediments if the sediment is exploited with manganese nodules. It is economically infeasible to develop low-grade REE sediments at this moment in time because the exploitation of REE-bearing sediments with manganese nodules increase the mining cost. © 2014, Korea Ocean Research and Development Institute. All rights reserved.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2954
DOI
10.4217/OPR.2014.36.4.383
Bibliographic Citation
Ocean and Polar Research, v.36, no.4, pp.383 - 394, 2014
Publisher
Korea Ocean Research and Development Institute
Subject
Archean; hydrothermal deposit; hydrothermal vent; lithology; manganese nodule; marine sediment; mineral exploration; mineral resource; rare earth element; Clarion Fracture Zone; Clipperton Fracture Zone; Pacific Ocean; Pacific Ocean (Northeast)
Keywords
Northeast Pacific; Rare earth elements; REE origin; REE resources; REE-bearing sediments
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Economic geology,Geochemistry,Resource geology,광상학,지구화학,자원지질학

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