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Alt, Jeffrey C; Chaussidon, Marc (1989): Sulfur isotopic composition of sulfides in ODP Hole 111-504B (Table 1). PANGAEA, https://doi.org/10.1594/PANGAEA.748378, Supplement to: Alt, JC; Chaussidon, M (1989): Ion microprobe analyses of the sulfur isotopic composition of sulfides in hydrothermally altered rocks, DSDP/ODP Hole 504B. In: Becker, K; Sakai, H; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 111, 41-45, https://doi.org/10.2973/odp.proc.sr.111.151.1989

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Abstract:
An ion microprobe was used to perform in-situ measurements of the sulfur isotopic compositions of sulfide minerals in seven samples of hydrothermally altered rocks from DSDP/ODP Hole 504B. The sulfides exhibit a wide range in d34S values, from -4.1 per mil to + 8.3 per mil. Heterogeneities exist among different sulfide grains in a given sample as well as within individual grains. A transect across a centimeter-size pyrite crystal reveals d34S values that span the range of the entire data set, indicating a complex growth history for this crystal. The positive d34S values are similar to those reported for seafloor sulfide deposits and are interpreted to reflect a combination of sulfur leached from basalts and 34S-rich sulfide derived from seawater sulfate. Incorporation of seawater-derived sulfur is greatest in a stockworklike sulfide mineralization in the core, where subsurface mixing occurred between hydrothermal fluids and seawater. Variations in d34S are attributed to (1) incorporation of variable amounts of seawater-derived sulfide, (2) kinetic effects during precipitation, (3) reservoir effects during precipitation, (4) and variations in pH and f(O2) .
Project(s):
Coverage:
Latitude: 1.226900 * Longitude: -83.730300
Date/Time Start: 1986-10-05T11:45:00 * Date/Time End: 1986-10-16T18:15:00
Minimum DEPTH, sediment/rock: 635.9 m * Maximum DEPTH, sediment/rock: 1186.6 m
Event(s):
111-504B * Latitude: 1.226900 * Longitude: -83.730300 * Date/Time Start: 1986-10-05T11:45:00 * Date/Time End: 1986-10-16T18:15:00 * Elevation: -3474.0 m * Penetration: 1562.1 m * Recovery: 27.36 m * Location: North Pacific Ocean * Campaign: Leg111 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores; 209 m cored; 0 m drilled; 13.1 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelAlt, Jeffrey CDSDP/ODP/IODP sample designation
2DEPTH, sediment/rockDepth sedmGeocode
3Mineral nameMineralAlt, Jeffrey C
4δ34Sδ34S‰ CDTAlt, Jeffrey CIon microprobe
5δ34Sδ34S‰ CDTAlt, Jeffrey CIon microprobeanalysis after repositioning
6δ34S, pyriteδ34S Py‰ CDTAlt, Jeffrey C
7δ34S, pyriteδ34S Py‰ CDTAlt, Jeffrey CChalcopyrite
8NickelNi%Alt, Jeffrey C
9NickelNi%Alt, Jeffrey Cmax.
10CobaltCo%Alt, Jeffrey C
11CobaltCo%Alt, Jeffrey Cmax.
Size:
174 data points

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