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Geochemistry of REY-Enriched Phosphorites in Zhijin Region, Guizhou Province, SW China: Insight into the Origin of REY
Shan He; Yong Xia; Jiafei Xiao; Daniel Gregory; Zhuojun Xie; Qinping Tan; Haiying Yang; Haiyan Guo; Shengwei Wu; Xingxiang Gong
2022
Source PublicationMinerals
Volume12
Abstract

The rare earth elements and yttrium (REY)-enriched phosphorites in the Zhijin region, southwest China, have attracted much attention, yet its origin has not been sufficiently addressed. The geology, mineralogy and geochemistry of samples from four sections of the early Cambrian age from the Zhijin region were studied to attain the redox condition and origin of REY. Data from in situ analysis show that REY are mainly contained in francolite, and the two types of francolite (bioclastic and granular) have no distinct difference in REY content (ΣREY). A Ce anomaly indicates an oxic condition in primary seawater. An Eu anomaly and ratios of redox sensitive elements (RSEs) indicate a fluctuating redox condition during phosphorite deposition. Shale-normalized REY patterns of whole rock and francolite show a hat-shaped pattern, indicating the effect of diagenetic processes. The Y/Ho ratio of the selected sections ranges from 38.13 to 61.93, and together with the Y anomaly, LaN/NdN ratio, LaN/SmN ratio, and LaN/YbN ratio, this indicates a seawater origin. This is supported by the Ce/Ce* of the phosphorite that ranges from 0.32 to 0.52 and the Eu/Eu* that ranges from 0.88 to 1.82, which is similar to the characteristics of seawater and deep-sea mud. We also propose a minor contribution of terrigenous debris and influence of diagenesis and hydrothermal processes.

 

KeywordRare Earth Elements And Yttrium Phosphorites Francolite Gezhongwu Formation Origin
DOI10.3390/min12040408
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Indexed BySCI
Language英语
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/13704
Collection矿床地球化学国家重点实验室
期刊图书信息中心
Affiliation1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.University of Chinese Academy of Sciences, Beijing 101408, China
3.Department of Earth Sciences, University of Toronto, Earth Sciences Centre, 22 Ursula Franklin Street, Toronto, ON M5S 3B1, Canada
4.School of Earth Sciences, Yunnan University, Kunming 650500, China
5.School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
6.Reserve Bureau of Land and Mineral Resources of Guizhou Province, Guiyang 550081, China
Recommended Citation
GB/T 7714
Shan He,Yong Xia,Jiafei Xiao,et al. Geochemistry of REY-Enriched Phosphorites in Zhijin Region, Guizhou Province, SW China: Insight into the Origin of REY[J]. Minerals,2022,12.
APA Shan He.,Yong Xia.,Jiafei Xiao.,Daniel Gregory.,Zhuojun Xie.,...&Xingxiang Gong.(2022).Geochemistry of REY-Enriched Phosphorites in Zhijin Region, Guizhou Province, SW China: Insight into the Origin of REY.Minerals,12.
MLA Shan He,et al."Geochemistry of REY-Enriched Phosphorites in Zhijin Region, Guizhou Province, SW China: Insight into the Origin of REY".Minerals 12(2022).
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