Pasquier, Virgil: Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone from ODP Hole 201-1229E [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.936040 (dataset in review)
Abstract:
Sulfur cycling is ubiquitous in sedimentary environments, where it mediates organic carbon remineralization, impacting both local and global redox budgets, and leaving an imprint in pyrite sulfur isotope ratios (δ34Spyr). It is unclear to what extent stratigraphic δ34Spyr variations reflect local aspects of the depositional environment or microbial activity versus global sulfur-cycle variations. Here, we couple carbon-nitrogen-sulfur concentrations and stable isotopes to identify clear influences on δ34Spyr of local environmental changes along the Peru margin. Stratigraphically coherent glacial-interglacial δ34Spyr fluctuations (>30‰) were mediated by Oxygen Minimum Zone intensification/expansion and local enhancement of organic matter deposition. The higher resulting microbial sulfate reduction rates led to more effective drawdown and 34S-enrichment of residual porewater sulfate and sulfide produced from it, some of which is preserved in pyrite. We identify organic carbon loading as a major influence on δ34Spyr, adding to the growing body of evidence highlighting the local controls on these records.
Coverage:
Latitude: -10.976080 * Longitude: -77.958010
Date/Time Start: 2002-03-09T19:50:00 * Date/Time End: 2002-03-10T07:20:00
Minimum DEPTH, sediment/rock: 0.53 m * Maximum DEPTH, sediment/rock: 43.00 m
Event(s):
201-1229E * Latitude: -10.976080 * Longitude: -77.958010 * Date/Time Start: 2002-03-09T19:50:00 * Date/Time End: 2002-03-10T07:20:00 * Elevation: -151.3 m * Penetration: 121.5 m * Recovery: 99.64 m * Location: South Pacific Ocean * Campaign: Leg201 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 121.5 m cored; 0 m drilled; 82 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Pasquier, Virgil | Geocode – mbsf | |
| 2 | AGE | Age | ka BP | Pasquier, Virgil | Geocode | |
| 3 | Calcium carbonate | CaCO3 | % | Pasquier, Virgil | wt. % | |
| 4 | Barium/Aluminium ratio | Ba/Al | Pasquier, Virgil | |||
| 5 | δ15N | δ15N | ‰ air | Pasquier, Virgil | VAIR | |
| 6 | Nitrogen, total | TN | % | Pasquier, Virgil | wt. % | |
| 7 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Pasquier, Virgil | vs. VPDB | |
| 8 | Carbon, organic, total | TOC | % | Pasquier, Virgil | wt. % | |
| 9 | δ34S, pyrite | δ34S Py | ‰ CDT | Pasquier, Virgil | vs. VCDT | |
| 10 | Sulfur, total | TS | % | Pasquier, Virgil | wt. % | |
| 11 | Iron II, ferrous iron | Fe(II) | % | Pasquier, Virgil | Iron HCl extraction (Kostka & Luther, 1994) | wt. % |
| 12 | Iron III, ferric iron | Fe(III) | % | Pasquier, Virgil | Iron HCl extraction (Kostka & Luther, 1994) | wt. % |
| 13 | Iron, dithionite-citrate-leached | Fe-di-ct | % | Pasquier, Virgil | wt. % | |
| 14 | Iron, oxalate-leached | Fe-oxa | % | Pasquier, Virgil | wt. % | |
| 15 | Iron | Fe | % | Pasquier, Virgil | CRS; wt. % | |
| 16 | Iron, pyrite | Fe Py | % | Pasquier, Virgil | Corrected | Corr., wt. % |
| 17 | Iron, total | Fe tot | % | Pasquier, Virgil | wt. % |
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:
584 data points