IOCAS-IR  > 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, Shuai1; Yin, Xuebo1; Wang, Xiaoyuan1,2; Huang, Xin3; Ma, Yao1; Guo, Kun1; Zeng, Zhigang1,2
2018-04-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume95Pages:118-130
Corresponding AuthorChen, Shuai(chenshuai@qdio.ac.cn)
AbstractFerromanganese 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.
KeywordGagua Ridge Ferromanganese oxides Geochemical composition Hydrogenetic growth
DOI10.1016/j.oregeorev.2018.02.026
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000432760500008
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/159387
Collection海洋地质与环境重点实验室
Corresponding AuthorChen, Shuai
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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.
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