Citation:

odp.proc.sr.112.192.1990

Name: Sulfur geochemistry at ODP Site 112-680 and 112-686
Published: 1990
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

We have measured the concentrations of (1) pore-water sulfide and (2) solid-phase pyrite, iron monosulfide (=acid volatile sulfide), elemental sulfur, and extractable and nonextractable organic ("kerogen") sulfur in sediments from Ocean Drilling Program (ODP) Sites 680 and 686. Pore-water sulfide defines classic "bell-shaped" profiles. Maximum concentrations of 6 to 12 mM occur where sulfate is exhausted, or is most depleted, at depths between 15 and 50 mbsf. Sulfide resulting from bacterial sulfate reduction reacts in three ways: (1) some is reoxidized to elemental sulfur in surface sediments; (2) some reacts with detrital iron minerals to form iron monosulfide and pyrite, primarily in the top meter or two of the sediment; and (3) some reacts with, and is incorporated into, kerogen. Incorporation of reduced sulfur into kerogen occurs over the top 15 m of the sediment at both Sites 680 and 686, after the main phase of pyrite formation. Up to 45% of the total sedimentary sulfur is organically bound, and concentrations of 12 wt% sulfur are reached in the kerogen. These values are like those measured in lithologically similar, but more deeply buried, sediments from the Monterey Formation.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: -12.272580 * Median Longitude: -77.484665 * South-bound Latitude: -13.480160 * West-bound Longitude: -78.077833 * North-bound Latitude: -11.065000 * East-bound Longitude: -76.891500

Date/Time Start: 1986-11-05T00:00:00 * Date/Time End: 1986-12-04T00:30:00

Event(s):

112-680 * Latitude: -11.065000 * Longitude: -78.077833 * Date/Time Start: 1986-11-05T00:00:00 * Date/Time End: 1986-11-06T00:00:00 * Elevation: -272.3 m * Penetration: 323.6 m * Recovery: 214.7 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 36 cores; 323.6 m cored; 0 m drilled; 66.3% recovery

112-680B * Latitude: -11.065000 * Longitude: -78.077830 * Date/Time Start: 1986-11-05T20:30:00 * Date/Time End: 1986-11-06T14:30:00 * Elevation: -273.0 m * Penetration: 195.5 m * Recovery: 98.45 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 195.5 m cored; 0 m drilled; 50.4 % recovery

112-686B * Latitude: -13.480160 * Longitude: -76.891500 * Date/Time Start: 1986-12-03T11:30:00 * Date/Time End: 1986-12-04T00:30:00 * Elevation: -458.0 m * Penetration: 303 m * Recovery: 225.53 m * Location: South Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 32 cores; 303 m cored; 0 m drilled; 74.4 % recovery

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

4 datasets

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Datasets listed in this publication series

Mossmann, J-R; Aplin, AC; Curtis, CD et al. (1990): (Table 1) Interstitial-water sulfide of ODP Site 112-680 and Hole 112-686B. https://doi.org/10.1594/PANGAEA.753651
Mossmann, J-R; Aplin, AC; Curtis, CD et al. (1990): (Table 2) Geochemistry of bulk sediments of ODP Holes 112-680B and 112-686B. https://doi.org/10.1594/PANGAEA.753652
Mossmann, J-R; Aplin, AC; Curtis, CD et al. (1990): (Table 4) Organic carbon concentrations of ODP Holes 112-680B and 112-686B. https://doi.org/10.1594/PANGAEA.753656
Mossmann, J-R; Aplin, AC; Curtis, CD et al. (1990): (Table 3) Partition of solid-phase sulfur species of ODP Holes 112-680B and 112-686B. https://doi.org/10.1594/PANGAEA.753655