{"data":{"id":"10.1594/pangaea.713718","type":"dois","attributes":{"doi":"10.1594/pangaea.713718","prefix":"10.1594","suffix":"pangaea.713718","identifiers":[],"alternateIdentifiers":[],"creators":[{"name":"Alt, Jeffrey C","givenName":"Jeffrey C","familyName":"Alt","affiliation":[],"nameIdentifiers":[]},{"name":"Shanks, Wayne C","givenName":"Wayne C","familyName":"Shanks","affiliation":[],"nameIdentifiers":[]}],"titles":[{"title":"Sulfur concentrations and isotopic composition of serpentinized oceanic peridotites"}],"publisher":"PANGAEA","container":{},"publicationYear":1998,"subjects":[{"subject":"Drilling/drill rig","subjectScheme":"Method"},{"subject":"Leg147","subjectScheme":"Campaign"},{"subject":"Leg149","subjectScheme":"Campaign"},{"subject":"Joides Resolution","subjectScheme":"Basis"},{"subject":"Ocean Drilling Program (ODP)","subjectScheme":"Project"}],"contributors":[],"dates":[{"date":"1998","dateType":"Issued"}],"language":"en","types":{"ris":"GEN","bibtex":"misc","citeproc":"article","schemaOrg":"Collection","resourceType":"Supplementary Publication Series of Datasets","resourceTypeGeneral":"Collection"},"relatedIdentifiers":[{"relationType":"IsSupplementTo","relatedIdentifier":"10.1029/98jb00576","relatedIdentifierType":"DOI"}],"relatedItems":[],"sizes":["2 datasets"],"formats":["application/zip"],"version":null,"rightsList":[{"rights":"Creative Commons Attribution 3.0 Unported","rightsUri":"https://creativecommons.org/licenses/by/3.0/legalcode","schemeUri":"https://spdx.org/licenses/","rightsIdentifier":"cc-by-3.0","rightsIdentifierScheme":"SPDX"}],"descriptions":[{"description":"The mineralogy, contents, and isotopic compositions of sulfur in oceanic serpentinites reflect variations in temperatures and fluid fluxes. Serpentinization of \u0026lt;1 Ma peridotites at Hess Deep occurred at high temperatures (200°-400°C) and low water/rock ratios. Oxidation of ferrous iron to magnetite maintained low ƒO2 and produced a reduced, low-sulfur assemblage including NiFe alloy. Small amounts of sulfate reduction by thermophilic microbes occurred as the system cooled, producing low-delta34S sulfide (1.5‰ to -23.7‰). In contrast, serpentinization of Iberian Margin peridotites occurred at low temperatures(~20°-200°C) and high water/rock ratios. Complete serpentinization and consumption of ferrous iron allowed evolution to higher ƒO2. Microbial reduction of seawater sulfate resulted in addition of low-delta34S sulfide (~15 to ~43‰) and formation of higher-sulfur assemblages that include valleriite and pyrite. The high SO4/total S ratio of Hess Deep serpentinites (0.89) results in an increase of total sulfur and high delta34S of total sulfur (mean ~8‰). In contrast, Iberian Margin serpentinites gained large amounts of 34S-poor sulfide (mean total S = 3800 ppm), and the high sulfide/total S ratio (0.61) results in a net decrease in delta34S of total sulfur (mean ~ -5‰). Thus serpentinization is a net sink for seawater sulfur, but the amount fixed and its isotopic composition vary significantly. Serpentinization may result in uptake of 0.4-14 * 10**12 g S/yr from the oceans, comparable to isotopic exchange in mafic rocks of seafloor hydrothermal systems and approaching global fluxes of riverine sulfate input and sedimentary sulfide output.","descriptionType":"Abstract"},{"description":"Supplement to: Alt, Jeffrey C; Shanks, Wayne C (1998): Sulfur in serpentinized oeanic peridotites: Serpentinization processes and microbial sulfate reduction. Journal of Geophysical Research: Solid Earth, 103(B5), 9917-9929","descriptionType":"Other"}],"geoLocations":[{"geoLocationBox":{"eastBoundLongitude":"-12.47399999999999","northBoundLatitude":"40.8388","southBoundLatitude":"2.2772","westBoundLongitude":"-101.446"}},{"geoLocationPlace":"North Pacific Ocean"},{"geoLocationPlace":"North Atlantic 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