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dc.contributor.authorSahlström, Fredrik
dc.contributor.authorTroll, Valentin R
dc.contributor.authorStrmic Palinkas, Sabina
dc.contributor.authorKooijman, Ellen
dc.contributor.authorZheng, Xinyuan
dc.date.accessioned2022-09-08T09:25:37Z
dc.date.available2022-09-08T09:25:37Z
dc.date.issued2022-08-29
dc.description.abstractSub-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 δ<sup>56</sup>Fe signature of dissolved iron released from TAG into the North Atlantic Ocean. Texturally distinct types of pyrite, in turn, preserve a δ<sup>56</sup>Fe 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.en_US
dc.identifier.citationSahlström F, Troll VR, Strmic Palinkas S, Kooijman E, Zheng. Iron isotopes constrain sub-seafloor hydrothermal processes at the Trans-Atlantic Geotraverse (TAG) active sulfide mound. Communications Earth & Environment. 2022;3(1)en_US
dc.identifier.cristinIDFRIDAID 2048126
dc.identifier.doihttps://doi.org/10.1038/s43247-022-00518-2
dc.identifier.issn2662-4435
dc.identifier.urihttps://hdl.handle.net/10037/26716
dc.language.isoengen_US
dc.publisherNatureen_US
dc.relation.journalCommunications Earth & Environment
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleIron isotopes constrain sub-seafloor hydrothermal processes at the Trans-Atlantic Geotraverse (TAG) active sulfide mounden_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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