dc.contributor.author
Schwarzenbach, Esther M.
dc.contributor.author
Caddick, Mark J.
dc.contributor.author
Petroff, Matthew
dc.contributor.author
Gill, Benjamin C.
dc.contributor.author
Cooperdock, Emily H. G.
dc.contributor.author
Barnes, Jaime D.
dc.date.accessioned
2018-10-31T12:57:29Z
dc.date.available
2018-10-31T12:57:29Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/23143
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-936
dc.description.abstract
Subduction zones impose an important control on the geochemical cycling between the surficial and internal reservoirs of the Earth. Sulphur and carbon are transferred into Earth’s mantle by subduction of pelagic sediments and altered oceanic lithosphere. Release of oxidizing sulphate- and carbonate-bearing fluids modifies the redox state of the mantle and the chemical budget of subduction zones. Yet, the mechanisms of sulphur and carbon cycling within subduction zones are still unclear, in part because data are typically derived from arc volcanoes where fluid compositions are modified during transport through the mantle wedge. We determined the bulk rock elemental, and sulphur and carbon isotope compositions of exhumed ultramafic and metabasic rocks from Syros, Greece. Comparison of isotopic data with major and trace element compositions indicates seawater alteration and chemical exchange with sediment-derived fluids within the subduction zone channel. We show that small bodies of detached slab material are subject to metasomatic processes during exhumation, in contrast to large sequences of obducted ophiolitic sections that retain their seafloor alteration signatures. In particular, fluids circulating along the plate interface can cause sulphur mobilization during several stages of exhumation within high-pressure rocks. This takes place more pervasively in serpentinites compared to mafic rocks.
en
dc.format.extent
11 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
subduction zone
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Sulphur and carbon cycling in the subduction zone mélange
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
15517
dcterms.bibliographicCitation.doi
10.1038/s41598-018-33610-9
dcterms.bibliographicCitation.journaltitle
Scientific Reports
dcterms.bibliographicCitation.volume
8
dcterms.bibliographicCitation.url
https://doi.org/10.1038/s41598-018-33610-9
refubium.affiliation
Geowissenschaften
refubium.funding
Deutsche Forschungsgemeinschaft (DFG)
refubium.note.author
Die Publikation wurde aus Open Access Publikationsgeldern der Freien Universität Berlin und der DFG gefördert.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
2045-2322