The geochemistry and formation of ferromanganese oxides on the eastern flank of the Gagua Ridge

doi:10.1016/j.oregeorev.2018.02.026

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

	The geochemistry and formation of ferromanganese oxides on the eastern flank of the Gagua Ridge
	Chen, Shuai 1; Yin, Xuebo 1; Wang, Xiaoyuan 1,2; Huang, Xin 3; Ma, Yao1 ; Guo, Kun 1; Zeng, Zhigang 1,2
刊名	ORE GEOLOGY REVIEWS
	2018-04-01
卷号	95 页码:118-130
关键词	Gagua Ridge Ferromanganese oxides Geochemical composition Hydrogenetic growth
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2018.02.026
通讯作者	Chen, Shuai(chenshuai@qdio.ac.cn)
英文摘要	Ferromanganese oxides on the eastern flank of the Gagua Ridge were collected from a water depth of 4071 m by TV-grab in 2016 and analyzed for their mineralogical and chemical compositions. These oxide fragments were broken from a large poly-core crust and can be divided into three parts: a dense inner nodule, a radial middle crust and a loose outer crust. The close proximity of the nodule and crust is similar to that observed in the amalgamated deposits from the Shatsky Rise, NW Pacific. All samples are mainly composed of Fe-rich vernadite, amorphous FeOOH and associated quartz, plagioclase, pyroxene and Mg-titanomagnetite. The mineralogy, Mn/ Fe ratios, rare earth element patterns, and slow growth rates (with a mean value of 6.2 mm/Myr) of the samples reflect their predominantly hydrogenetic origin. Co, Ni, Cu, REY and other critical metals are most enriched in the Mn-rich inner nodule samples, which also have the highest Fe contents. In contrast, the Si and Al contents in the samples of the middle and outer crusts are very high, up to 19 wt% and 6.29 wt%, respectively. Correlation analysis indicates that Li, Sc, Cr, Rb, and Cs tend to concentrate in detrital silica-aluminosilicate phases. The Gagua Ridge samples generally have lower metal contents than the hydrogenetic crusts and nodules from other open ocean regions, which can be attributed to their dilution by detritus and the poor development of a mid-water oxygen minimum zone. However, the incorporation of detritus has little effect on the generation of Fe-Mn oxides in the Gagua Ridge. Based on their mineralogy, textures and chemical variations, the accretion of the hydrogenetic Fe-Mn oxides was initiated in the late Miocene, and the formation of the amalgamated Fe-Mn deposits comprised three stages.
资助项目	National Natural Science Foundation of China[41306053] ; National Natural Science Foundation of China[41476044] ; National Natural Science Foundation of China[41325021] ; National Natural Science Foundation of China[41706052] ; National Key Basic Research Program of China[2013CB429700] ; Open Fund of the Key Laboratory of Marine Geology and Environment ; Chinese Academy of Sciences[MGE2015KG01] ; Chinese Academy of Sciences[MGE2011KG09] ; Special Fund for the Taishan Scholar Program of Shandong Province[ts201511061] ; AoShan Talents Program ; Qingdao National Laboratory for Marine Science and Technology[2015ASTP-0S17]
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000432760500008
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/159386]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Chen, Shuai
作者单位	1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Peoples R China 3.Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China
推荐引用方式 GB/T 7714	Chen, Shuai,Yin, Xuebo,Wang, Xiaoyuan,et al. The geochemistry and formation of ferromanganese oxides on the eastern flank of the Gagua Ridge[J]. ORE GEOLOGY REVIEWS,2018,95:118-130.
APA	Chen, Shuai.,Yin, Xuebo.,Wang, Xiaoyuan.,Huang, Xin.,Ma, Yao.,...&Zeng, Zhigang.(2018).The geochemistry and formation of ferromanganese oxides on the eastern flank of the Gagua Ridge.ORE GEOLOGY REVIEWS,95,118-130.
MLA	Chen, Shuai,et al."The geochemistry and formation of ferromanganese oxides on the eastern flank of the Gagua Ridge".ORE GEOLOGY REVIEWS 95(2018):118-130.