In situ rare earth element analysis of a lower Cambrian phosphate nodule by LA-ICP-MS

doi:10.1017/S0016756820000850

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	In situ rare earth element analysis of a lower Cambrian phosphate nodule by LA-ICP-MS
	Ye, Yun-Tao 2; Wang, Hua-Jian 2; Wang, Xiao-Mei 2; Zhai, Li-Na 3; Wu, Chao-Dong 1,4; Zhang, Shui-Chang 2
刊名	GEOLOGICAL MAGAZINE
	2021-04-01
卷号	158 期号:4 页码:749-758
关键词	Carbonate fluorapatite cerium anomaly MREE enrichment stratified ocean Niutitang Formation
ISSN号	0016-7568
DOI	10.1017/S0016756820000850
通讯作者	Wang, Hua-Jian(wanghuajian@petrochina.com.cn)
英文摘要	Rare earth elements (REE) in marine minerals have been widely used as proxies for the redox status of depositional and/or diagenetic environments. Phosphate nodules, which are thought to grow within decimetres below the sediment-water interface and to be able to scavenge REE from the ambient pore water, are potential archives of subtle changes in REE compositions. Whether their REE signals represent specific redox conditions or they can be used to track the overlying water chemistry is worth exploring. Through in situ laser ablation - inductively coupled plasma - mass spectrometry (LA-ICP-MS), we investigate the REE compositions of a drill-core-preserved phosphate nodule from the lower Cambrian Niutitang Formation in the Daotuo area, northeastern Guizhou Province, South China. REE distributions of the nodule show concentric layers with systematic decreases in Ce anomalies (Ce/Ce) from the core to the rim. The lowest Ce/Ce appears in the outer rim where REE concentrations are relatively high. These results are interpreted to reflect REE exchange with pore water at a very early stage or bathymetric variation during apatite precipitation. The origin of the shale-normalized middle REE (MREE) enrichment in our sample is less constrained. Possible driving factors include preferential MREE substitution for Ca in the apatite lattice, degradation of organic matter and deposition beneath a ferruginous zone. Although speculative, the last possibility is consistent with the chemically stratified model for early Cambrian oceans, in which dynamic fluctuations of the chemocline provided an ideal depositional context for phosphogenesis.
资助项目	National Key Research and Development Program of China[2017YFC0603101] ; National Science and Technology Major Project of the Ministry of Science and Technology of China[2016ZX05004001] ; National Natural Science Foundation of China[41530317] ; National Natural Science Foundation of China[41872125] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010101] ; Scientific Research and Technological Development Project of CNPC[2016A-0200]
WOS研究方向	Geology
语种	英语
出版者	CAMBRIDGE UNIV PRESS
WOS记录号	WOS:000631520600010
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/170141]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Wang, Hua-Jian
作者单位	1.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Minist Educ, Beijing 100871, Peoples R China 2.China Natl Petr Corp, Key Lab Petr Geochem, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.Peking Univ, Inst Oil & Gas, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Ye, Yun-Tao,Wang, Hua-Jian,Wang, Xiao-Mei,et al. In situ rare earth element analysis of a lower Cambrian phosphate nodule by LA-ICP-MS[J]. GEOLOGICAL MAGAZINE,2021,158(4):749-758.
APA	Ye, Yun-Tao,Wang, Hua-Jian,Wang, Xiao-Mei,Zhai, Li-Na,Wu, Chao-Dong,&Zhang, Shui-Chang.(2021).In situ rare earth element analysis of a lower Cambrian phosphate nodule by LA-ICP-MS.GEOLOGICAL MAGAZINE,158(4),749-758.
MLA	Ye, Yun-Tao,et al."In situ rare earth element analysis of a lower Cambrian phosphate nodule by LA-ICP-MS".GEOLOGICAL MAGAZINE 158.4(2021):749-758.