文献类型：期刊文献

英文题名：Geochemical characteristics of sediments in the southern Mid-Atlantic Ridge indicate hydrothermal activity: Evidence from rare earth elements

作者：Wang, Wenzhuo[1,3];Huang, Xin[1,2,3,4];Chen, Shuai[2,4];Li, Longwei[1,3];Wang, Yuhao[1,3];Kang, Yurou[1,3];Nie, Yuhui[1,3]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[2]Qingdao Marine Sci & Technol Ctr, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China;[3]Guangdong Ocean Univ, Key Lab Climate Resources & Environm Continental S, Dept Educ Guangdong Prov, Zhanjiang 524088, Peoples R China;[4]Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China

年份：2024

卷号：168

外文期刊名：MARINE AND PETROLEUM GEOLOGY

收录：SCI-EXPANDED(收录号：WOS:001292189900001)、、EI(收录号：20243216845559)、Scopus(收录号：2-s2.0-85200648285)、WOS

基金：This work was supported by the National Natural Science Foundation of China (grant Nos. 42006065) , the Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences (grantr No. MGE2021KG04, MGE2022KG9, MGE2022KG10) , the Special Fund for the Nanhai Young Scholar Program of Guangdong Ocean University (grant No. 573118019) , the Innovative Team Project of Guangdong Universities (grant No. 2019KCXTF021) , the Marine Science Research Team Project of Guangdong Ocean University (grant No. 002026002004) , and the Program for Scientific Research Start-up Funds of Guangdong Ocean University (grant No. E15169) . The authors thank the crews of the COMRA cruise (DY115-22 and DY115-26) for their help with sampling operations, as well as Xuebo Yin for his help with sam-pling analysis.

语种：英文

外文关键词：Southern Mid-Atlantic Ridge; Sediments; Hydrothermal activity; Rare earth element (REE)

外文摘要：Geochemical analysis was carried out on ten sediment samples collected from the Southern Mid-Atlantic Ridge at 12 degrees-15 degrees S degrees-15 degrees S between 2010 and 2012 using inductively coupled plasma-mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometer (ICP-OES). The content of representative metals such as Fe, Mn, Co, and Zn was found to be higher in samples near hydrothermal vents than in pelagic sediments (e.g., 22VTVG14). The ratios of Co/Zn and Zn/Fe in stations near hydrothermal vents were 0.21-0.51 and 2.20x10-- 3- 3.00x10-- 3 , respectively, indicating a hydrothermal source. The ratio of light rare earth elements (LREE) to heavy rare earth elements (HREE) was between 3.71 and 6.03, indicating enrichment of LREE and depletion of HREE. The REE chondrite-normalized patterns of the samples (except for sample 22V-TVG13) showed a negative Ce anomaly (delta Ce = 0.40-0.64) and slightly negative Eu anomaly (delta Eu = 0.68-0.89), suggesting that the REEs may have originated from a mixture of low-temperature dispersed hydrothermal fluids and seawater. The total REE content was higher in samples near hydrothermal vents (42.19-48.28 mu g center dot g-1)- 1 ) than in samples far from hydrothermal vents (17.33 mu g center dot g-- 1 ), indicating that hydrothermal activity affected the distribution of REE in the sediments. The Y/Ho ratios (except for 22V-TVG14) were between 27.87 and 45.97, which also indicated that REE may be derived from hydrothermal fluids. Similar geochemical behavior of sample 22V-TVG13 and samples near hydrothermal vents suggest the presence of an undiscovered hydrothermal field near the sampling station.