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

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

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

Geology | Updated：2024-10-11

- 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
- 海洋湖沼学报(英文) 2024年42卷第4期页码：1106-1118
- Affiliations：
  
  1.Key Laboratory of Submarine Geosciences & Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
  2.Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China
  3.School of Earth Science, Zhejiang University, Hangzhou 310027, China
  4.Ocean College, Zhejiang University, Zhoushan 316021, China
- Author bio：
  
  qiuzy@sio.org.cn
- Funds：
  
  the National Natural Science Foundation of China(41976075);the National Key Research and Development Program of China(2021YFF0501302);the Fundamental Research Funds for National Non-profit Institute Grant(JG2103);the China Ocean Mineral Resources R&D Association project(DY135-S2-1-03)
- DOI：
  中图分类号：
- 收稿：2023-04-26，
  
  纸质出版：2024-07-01
- Accepted：
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Discovery and characterization of a new hydrothermal field at 2°‍N on the slow-spreading Carlsberg Ridge[J]. 海洋湖沼学报(英文), 2024,42(4):1106-1118.

QIU Zhongyan,WANG Yejian,HAN Xiqiu,et al.Discovery and characterization of a new hydrothermal field at 2°‍N on the slow-spreading Carlsberg Ridge[J].Journal of Oceanology and Limnology,2024,42(04):1106-1118.
Discovery and characterization of a new hydrothermal field at 2°‍N on the slow-spreading Carlsberg Ridge[J]. 海洋湖沼学报(英文), 2024,42(4):1106-1118. DOI：

QIU Zhongyan,WANG Yejian,HAN Xiqiu,et al.Discovery and characterization of a new hydrothermal field at 2°‍N on the slow-spreading Carlsberg Ridge[J].Journal of Oceanology and Limnology,2024,42(04):1106-1118. DOI：

摘要

Abstract

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

C 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/(cm

·ka) and 0.59 to 11.49 mg/(cm

·ka)

respectively. Temporal variations in the fluxes of hydrothermal Fe indicate tha

t there have been at least three amplified hydrothermal venting events (H1

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.

关键词

Keywords

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