Geochemical characteristics and metal element enrichment in crusts from seamounts of the Western Pacific

doi:10.1007/s11707-015-0504-9

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	Geochemical characteristics and metal element enrichment in crusts from seamounts of the Western Pacific
	Zhang, Xiaoyu 1; Zhu, Kechao 2; Du, Yong 1; Zhang, Fuyuan 3,4; Zhang, Weiyan 3,4; Ren, Xiangwen 5; Jiang, Binbin 1; Huang, Dasong 1
刊名	FRONTIERS OF EARTH SCIENCE
	2016-03
卷号	10 期号:1 页码:171-182
关键词	cobalt-rich crust seamounts Western Pacific geochemical characteristics
ISSN号	2095-0195
DOI	10.1007/s11707-015-0504-9
英文摘要	Elemental geochemistry is an essential part of understanding mineralization mechanisms. In this paper, a data set of 544 cobalt crust samples from seamounts of the Western Pacific are used to study the enrichment characteristics of metal elements. REE normalization is utilized to reveal the origin of the crusts; effects of water depth on Co enrichment and impacts of phosphatization on mineral quality are discussed to obtain the evolution of these marine mineral deposits, which gives support to further resource assessment. Conclusions are reached as follows: 1) Elemental abundances, inter-element relationships, and shale-normalized REE patterns for phosphatepoor crusts from different locations reflect hydrogenetic origin of the crusts. EFs (enrichment coefficients) of REE exhibit exponential increase from surface sediments to phosphorite to polymetallic nodules to crusts, suggesting that the improved degree of hydrogeneous origin induces the enrichment of REE. 2) The crusts in the Western Pacific, formed through hotspot produced guyots trails, have relatively lower REE than those in the Mid-Pacific. The latter could be attributed to the peculiar submarine topography of seamounts formed by intraplate volcanism. 3) The non-phosphatized younger crust layers have 40% higher Co than the phosphatized older layers. This indicates the modification of the elemental composition in these crusts by phosphatization. A general depletion of hydroxide-dominated elements such as Co, Ni, and Mn and enrichment of P, Ca, Ba, and Sr is evident in phosphatized crusts, whereas non-phosphatized younger generation crusts are rich in terrigenous aluminosilicate detrital matter. 4) Co increases above the carbonate compensation depth (CCD) from less than 0.53% to over 0.65% in seamount regions with water depth of less than 2,500 m, suggesting the significance of the dissolution of carbonate in the sea water column to the growth and composition of crusts.
资助项目	Interdisciplinary Guiding Fund of Marine Science of Zhejiang University[2012HY006A]
WOS研究方向	Geology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000373641900015
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3491]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.Zhejiang Univ, Dept Earth Sci, Hangzhou 310012, Zhejiang, Peoples R China; 2.Guangzhou Marine Geol Survey, Minist Land & Resources, Guangzhou 510760, Guangdong, Peoples R China; 3.State Ocean Adm, Key Lab Submarine Geosci, Hangzhou 310012, Zhejiang, Peoples R China; 4.State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China; 5.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaoyu,Zhu, Kechao,Du, Yong,et al. Geochemical characteristics and metal element enrichment in crusts from seamounts of the Western Pacific[J]. FRONTIERS OF EARTH SCIENCE,2016,10(1):171-182.
APA	Zhang, Xiaoyu.,Zhu, Kechao.,Du, Yong.,Zhang, Fuyuan.,Zhang, Weiyan.,...&Huang, Dasong.(2016).Geochemical characteristics and metal element enrichment in crusts from seamounts of the Western Pacific.FRONTIERS OF EARTH SCIENCE,10(1),171-182.
MLA	Zhang, Xiaoyu,et al."Geochemical characteristics and metal element enrichment in crusts from seamounts of the Western Pacific".FRONTIERS OF EARTH SCIENCE 10.1(2016):171-182.