Hydrothermal signatures in sediments along the South Mid-Atlantic Ridge from 18°S to 22°S: implications for potential hydrothermal fields

Peng YANG; Chuanshun LI; Jihua LIU; Baoju YANG; Jun YE; Bing LI; Yuan DANG; Dewen DU

doi:10.1007/s00343-024-4116-7

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Hydrothermal signatures in sediments along the South Mid-Atlantic Ridge from 18°S to 22°S: implications for potential hydrothermal fields

Geology | Updated：2025-05-27

- Hydrothermal signatures in sediments along the South Mid-Atlantic Ridge from 18°S to 22°S: implications for potential hydrothermal fields
- Journal of Oceanology and Limnology Vol. 43, Issue 3, Pages: 746-763(2025)
- Affiliations：
  
  1.Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  2.Shandong Key Laboratory of Deep Sea Mineral Resources Development, Qingdao 266061, China
  3.School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China
- Author bio：
  
  lichuanshun@fio.org.cn
  liujihua@fio.org.cn
- Funds：
- DOI：10.1007/s00343-024-4116-7
  CLC：
- Received：29 April 2024，
  
  Online First：15 July 2024，
  
  Published：01 May 2025
- Accepted：
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YANG Peng,LI Chuanshun,LIU Jihua,et al.Hydrothermal signatures in sediments along the South Mid-Atlantic Ridge from 18°S to 22°S: implications for potential hydrothermal fields[J].Journal of Oceanology and Limnology,2025,43(03):746-763.
DOI：

YANG Peng,LI Chuanshun,LIU Jihua,et al.Hydrothermal signatures in sediments along the South Mid-Atlantic Ridge from 18°S to 22°S: implications for potential hydrothermal fields[J].Journal of Oceanology and Limnology,2025,43(03):746-763. DOI： 10.1007/s00343-024-4116-7.

摘要

Abstract

The hydrothermal signatures of mid-ocean ridge sediments are crucial geochemical data providing insights into investigating hydrothermal anomalies and locating seafloor massive sulfide deposits. This paper outlines the geochemical features of 24 surface sediments and one sediment core (26V-GC01

294 cm) along the South Mid-Atlantic Ridge (SMAR) from 18°S to 22°S

an area where hydrothermal active fields have yet to be discovered. The surface sediments mainly consist of biogenic carbonates

aluminosilicates

and hydrothermal Fe-Mn (oxy) oxides. The core sediments primarily comprise organic matter

detrital materials

hydrothermal components

and substances scavenged from seawater. The rare Earth element (REE) patterns suggest the presence of hydrothermal contributions within the surface and core sediments. The enrichment factors for Fe

and Zn in surface sediments suggest these metals are concentrated at the 19°S

21°S

and 21.5°S segments

further indicating their potential as hydrothermal active fields. Downcore variations of Fe

and Co suggest at least six episodes of hydrothermal activity. The impact of hydrothermal processes on the sediments from SMAR 18°S to 22°S indicates that the study area has the potential to host a significant number of hydrothermal active fields.

关键词

Keywords

references

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