首页|Discovery and characterization of a new hydrothermal field at 2°N on the slow-spreading Carlsberg Ridge

Discovery and characterization of a new hydrothermal field at 2°N on the slow-spreading Carlsberg Ridge

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  • 国家科技期刊平台
  • NETL
  • NSTL
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A new hydrothermal field(Tianshi)was discovered on the rift valley wall through plume anomaly surveys and geological work conducted in 2012 and 2018 between 2°35′N and 2°43′N of the slow-spreading Carlsberg Ridge(CR).Here,the results of two expeditions conducted to detect and characterize the new hydrothermal field are reported.Mineralogical and geochemical data,as well as 14C ages of a sediment core collected near the field are presented to reveal the hydrothermal history.Results show that the Tianshi field is a basalt-hosted hydrothermal system.Geochemical data of the sediments collected near the field indicate a strong hydrothermal contribution,and hydrothermal Fe and Cu fluxes range from 30 to 155 mg/(cm2·ka)and 0.59 to 11.49 mg/(cm2·ka),respectively.Temporal variations in the fluxes of hydrothermal Fe indicate that there have been at least three amplified hydrothermal venting events(H1,H2,and H3)in the Tianshi field over the last 35.2 ka,in 28.6-35.2 ka BP,22.0-27.6 ka BP,and 1.2-11.4 ka BP,respectively.Hydrothermal event H2 was driven by an increased magmatic production associated with sea level fall during the Last Glacial Maximum,while event H3 was promoted by tectonic activity associated with a rapid sea level rise.This study further verified the role of sea level change in modulating hydrothermal activity on mid-ocean ridges.

plume anomalysediment corenew hydrothermal fieldhydrothermal historyCarlsberg Ridge

Zhongyan QIU、Yejian WANG、Xiqiu HAN、Honglin LI、Xing YU、Ruyong CUI、Mou LI、Xuegang CHEN、Jiqiang LIU

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Key Laboratory of Submarine Geosciences & Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China

Qingdao Institute of Marine Geology,China Geological Survey,Qingdao 266071,China

School of Earth Science,Zhejiang University,Hangzhou 310027,China

Ocean College,Zhejiang University,Zhoushan 316021,China

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National Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaFundamental Research Funds for National Nonprofit Institute GrantChina Ocean Mineral Resources R&D Association Project

419760752021YFF0501302JG2103DY135-S2-1-03

2024

10.1007/s00343-023-3076-7

海洋湖沼学报(英文版)
中国海洋湖沼学会

海洋湖沼学报(英文版)

CSTPCD
影响因子：0.386
ISSN：2096-5508
年,卷(期)：2024.42(4)
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