Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Iron isotopes constrain sub-seafloor hydrothermal processes at the Trans-Atlantic Geotraverse (TAG) active sulfide mound
Swedish Museum of Natural History, Department of Geology.ORCID iD: 0000-0003-2377-8272
Show others and affiliations
2022 (English)In: Communications Earth & Environment, E-ISSN 2662-4435, Vol. 3, no 1, article id 193Article in journal (Refereed) Published
Abstract [en]

Sub-seafloor hydrothermal processes along volcanically active plate boundaries are integral to the formation of seafloor massive sulfide deposits and to oceanic iron cycling, yet the nature of their relationship is poorly understood. Here we apply iron isotope analysis to sulfide minerals from the Trans-Atlantic Geotraverse (TAG) mound and underlying stockwork, 26°N Mid-Atlantic Ridge, to trace hydrothermal processes inside an actively-forming sulfide deposit in a sediment-free mid-ocean ridge setting. We show that data for recently formed chalcopyrite imply hydrothermal fluid–mound interactions cause small negative shifts (<−0.1‰) to the δ56Fe signature of dissolved iron released from TAG into the North Atlantic Ocean. Texturally distinct types of pyrite, in turn, preserve a δ56Fe range from −1.27 to +0.56‰ that reflects contrasting precipitation mechanisms (hydrothermal fluid–seawater mixing vs. conductive cooling) and variable degrees of progressive hydrothermal maturation during the >20 kyr evolution of the TAG complex. The identified processes may explain iron isotope variations found in fossil onshore sulfide deposits.

Place, publisher, year, edition, pages
2022. Vol. 3, no 1, article id 193
National Category
Geochemistry Environmental Sciences Geology Oceanography, Hydrology and Water Resources
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-5122DOI: 10.1038/s43247-022-00518-2OAI: oai:DiVA.org:nrm-5122DiVA, id: diva2:1720903
Funder
Swedish Research Council, 2020-03789Available from: 2022-12-20 Created: 2022-12-20 Last updated: 2022-12-20Bibliographically approved

Open Access in DiVA

fulltext(2741 kB)74 downloads
File information
File name FULLTEXT01.pdfFile size 2741 kBChecksum SHA-512
7401298c08c4bde990139ffc58f4ffca2cdff878c914661f5148d5ac4d3117e205ba59ac8c572d018bd88049c2ed50ec1130e80450d891f0a3436135b90fbc91
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Sahlström, FredrikTroll, Valentin R.Kooijman, EllenZheng, Xin-Yuan
By organisation
Department of Geology
In the same journal
Communications Earth & Environment
GeochemistryEnvironmental SciencesGeologyOceanography, Hydrology and Water Resources

Search outside of DiVA

GoogleGoogle Scholar
Total: 74 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 66 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf