Enrichment Mechanism of REY and Geochemical Characteristics of REY-Rich Pelagic Clay from the Central Pacific
Zhu Kechao
Ren Jiangbo
Wang Haifeng
Lu Hongfeng
Abstract：REE resources from deep-sea sediments is a kind of newly discovered and latent REE resources deposited on the ocean floor.Mineral component,major element and rare earth element analysis of 90 pelagic clay samples by piston core from the cen-tral Pacific have been conducted and compared with the geochemical chemistry of pelagic sediments from the central North Pacifc and Minami-Torishima area in the western North Pacific in this study.The results show that the pelagic clay from the central Pacific is rich in phillipsite,P,and REY,and significant fish teeth debris are contained in detrital component of pelagic clay;CaO and P2 O5 ,CaO,P2 O5 and ∑REY are positively correlated,and characterized by clear Ce negative anomaly and cer-tain HREE enrichment and Y positive anomaly in REE distribution.The REY enrichment of pelagic clay from the central Pacif-ic is mainly caused by excess phosphate component which may have resulted from the fish teeth debris mixed in the pelagic clay. The REY enrichment mechanism of REY-rich pelagic sediments in the North Pacific with no hydrothermal effect shows uni-formity and universality,which can be attributed to the admixture of high-REY phosphate in the pelagic clay.
Keywords：central Pacificpelagic claysedimentREY-rich deep-sea mudphosphategeochemistry
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 1052-1060 )