| 太平洋中部富REY深海沉积物的地球化学特征及化学分类 |
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| 关键词:central Pacific REY-rich pelagic sediment apatite classification of pelagic sediment |
| 基金项目:中国地质调查局大洋调查与研究项目(编号: GZH201100303-05) |
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| 摘要: |
| Geochemical Characteristics and Chemical Classification of REY-rich Pelagic Sediments from the Central Pacific Ocean |
| REE resource preserved in deep sea sediments is a kind of latent REE resource. Major element and rare earth element analysis of 1 275 pelagic sediment samples from 30 piston cores in the central Pacific was conducted in this study. The pelagic sediments from the central Pacific can be divided into three genetic types, that is, calcareous oozes sediments, siliceous oozes sediments and pelagic clay sediments by the content of CaO and Al2O3 based on the slice observation, which have similar REE distributions characterized by clear Ce negative anomaly and some HREE enrichment as well as Y positive anomaly, and the pelagic clay sediments generally have higher ΣREY. The diagram of the content of main elements (including CaO/P2O5) versus REY of the pelagic sediments can be used to distinguish the mixing state of different genetic component effectively. The pelagic clay sediments with high P and phillipsite content from the central Pacific are the most favorable REY-rich pelagic sediments. The REY enrichment of pelagic sediments from the central Pacific is mainly caused by excessive apatite components with fish teeth bone debris shape mixed in the pelagic sediments, and the admixture of the calcareous biologic and siliceous components have the dilute effect on the content of REY of the pelagic sediments. |
| ZHU Ke-chao,REN Jiang-bo,WANG Hai-feng.2016.Geochemical Characteristics and Chemical Classification of REY-rich Pelagic Sediments from the Central Pacific Ocean[J].Acta Geoscientica Sinica,37(3):287-293. |
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