Pasquier, Virgil; Fike, David A; Halevy, Itay: Strong local, not global, controls on marine pyrite sulfur isotopes [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.937620 (dataset in review)
Abstract:
Understanding variation in the sulfur isotopic composition of sedimentary pyrite (δ34Spyr) is motivated by the key role of sulfur biogeochemistry in regulating Earth's surface oxidation state. Until recently, the impact of local depositional conditions on δ34Spyr has remained underappreciated, and stratigraphic variations in δ34Spyr were interpreted mostly to reflect global changes in biogeochemical cycling. We present two coeval δ34Spyr records from shelf and basin settings in a single sedimentary system. Despite their proximity and contemporaneous deposition, these two records preserve radically different geochemical signals. Swings of ~65‰ in shelf δ34Spyr track short-term variations in local sedimentation and are completely absent from the abyssal record. In contrast, a long-term ~30‰ decrease in abyssal δ34Spyr reflects regional changes in ocean circulation and/or sustained pyrite formation. These results highlight strong local controls on δ34Spyr, calling for reevaluation of the current practice of using δ34Spyr stratigraphic variations to infer global changes in Earth's surface environment.
Coverage:
Median Latitude: -43.361500 * Median Longitude: -179.738500 * South-bound Latitude: -44.937000 * West-bound Longitude: 172.022000 * North-bound Latitude: -41.786000 * East-bound Longitude: -171.499000
Date/Time Start: 1998-09-12T00:00:00 * Date/Time End: 1998-09-24T00:00:00
Minimum Elevation: -3290.0 m * Maximum Elevation: -3290.0 m
Event(s):
181-1123 * Latitude: -41.786000 * Longitude: -171.499000 * Date/Time Start: 1998-09-12T00:00:00 * Date/Time End: 1998-09-24T00:00:00 * Elevation: -3290.0 m * Penetration: 1279.9 m * Recovery: 899.5 m * Location: South Pacific Ocean * Campaign: Leg181 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 102 cores; 957 m cored; 322.9 m drilled; 94% recovery
317-U1352 * Latitude: -44.937000 * Longitude: 172.022000 * Campaign: Exp317 (Canterbury Basin) * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Pasquier, Virgil | |||
| 2 | Size fraction 0.500-0.100 mm | 500-100 µm | % | Pasquier, Virgil | Cumulative depth in borehole in meters below sea floor (mbsf) | |
| 3 | Age | Age | Ma | Pasquier, Virgil | ||
| 4 | AGE | Age | ka BP | Pasquier, Virgil | Geocode | |
| 5 | Calcium carbonate | CaCO3 | % | Pasquier, Virgil | wt% | |
| 6 | δ15N | δ15N | ‰ air | Pasquier, Virgil | VAIR | |
| 7 | Nitrogen, total | TN | % | Pasquier, Virgil | wt% | |
| 8 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Pasquier, Virgil | vs. VPDB | |
| 9 | Carbon, organic, total | TOC | % | Pasquier, Virgil | wt% | |
| 10 | δ34S, pyrite | δ34S Py | ‰ CDT | Pasquier, Virgil | VCDT | |
| 11 | Iron disulfide | FeS2 | % | Pasquier, Virgil | wt% | |
| 12 | Δ Pyrite | Δ Py | ‰ CDT | Pasquier, Virgil | VCDT |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1732 data points