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Publication:
Geothermal energy and ore-forming potential of 600 °C mid-ocean-ridge hydrothermal fluids

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dc.contributor.authorBali, Enikő
dc.contributor.authorAradi, László E.
dc.contributor.authorZierenberg, Robert
dc.contributor.authorDiamond, Larryn William
dc.contributor.authorPettke, Thomas
dc.contributor.authorSzabo, Ábel
dc.contributor.authorGudfinnsson, Guðmundur H.
dc.contributor.authorFridleifsson, Guðmundur Ó.
dc.contributor.authorSzabo, Csaba
dc.date.accessioned2024-09-02T16:17:31Z
dc.date.available2024-09-02T16:17:31Z
dc.date.issued2020-08
dc.description.abstractThe ~4500-m-deep Iceland Deep Drilling Project (IDDP) borehole IDDP-2 in Iceland penetrated the root of an active seawater-recharged hydrothermal system below the Mid-Atlantic Ridge. As direct sampling of pristine free fluid was impossible, we used fluid inclusions to constrain the in situ conditions and fluid composition at the bottom of the hydrothermal convection cell. The fluid temperature is ~600 °C, and its pressure is near-hydrostatic (~45 MPa). The fluid exists as two separate phases: an H2O-rich vapor (with an enthalpy of ~59.4 kJ/mol) and an Fe-K–rich brine containing 2000 μg/g Cu, 3.5 μg/g Ag, 1.4 μg/g U, and 0.14 μg/g Au. Occasionally, the fluid inclusions coexist with rhyolite melt inclusions. These findings indicate that the borehole intersected high-energy steam, which is valuable for energy production, and discovered a potentially ore-forming brine. We suggest that similar fluids circulate deep beneath mid-ocean ridges worldwide and form volcanogenic massive sulfide Cu-Zn-Au-Ag ore deposits.
dc.description.numberOfPages5
dc.description.sponsorshipInstitut für Geologie
dc.identifier.doi10.7892/boris.147110
dc.identifier.publisherDOI10.1130/G47791.1
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/37402
dc.language.isoen
dc.publisherGeological Society of America
dc.relation.ispartofGeology
dc.relation.issn0091-7613
dc.relation.organizationDCD5A442C18FE17DE0405C82790C4DE2
dc.subject.ddc500 - Science::550 - Earth sciences & geology
dc.titleGeothermal energy and ore-forming potential of 600 °C mid-ocean-ridge hydrothermal fluids
dc.typearticle
dspace.entity.typePublication
oaire.citation.endPage1225
oaire.citation.issue12
oaire.citation.startPage1221
oaire.citation.volume48
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oairecerif.author.affiliationInstitut für Geologie
oairecerif.author.affiliationInstitut für Geologie
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unibe.date.licenseChanged2020-11-02 09:40:03
unibe.description.ispublishedpub
unibe.eprints.legacyId147110
unibe.journal.abbrevTitleGEOLOGY
unibe.refereedTRUE
unibe.subtype.articlejournal

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