Jarvis, Ian; Lignum, John S; Gröcke, Darren R; Jenkyns, Hugh C; Pearce, Martin A (2011): (Tabls S1) Bulk geochemistry for sediment samples collected from the Cenomanian-Turonian boundary section at Pont d'Issole [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.830602, Supplement to: Jarvis, I et al. (2011): Black shale deposition, atmospheric CO2 drawdown, and cooling during the Cenomanian-Turonian Oceanic Anoxic Event. Paleoceanography, 26(3), PA3201, https://doi.org/10.1029/2010PA002081
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Abstract:
Oceanic Anoxic Event 2 (OAE2), spanning the Cenomanian-Turonian boundary (CTB), represents one of the largest perturbations in the global carbon cycle in the last 100 Myr. The d13Ccarb, d13Corg, and d18O chemostratigraphy of a black shale-bearing CTB succession in the Vocontian Basin of France is described and correlated at high resolution to the European CTB reference section at Eastbourne, England, and to successions in Germany, the equatorial and midlatitude proto-North Atlantic, and the U.S. Western Interior Seaway (WIS). Delta13C (offset between d13Ccarb and d13Corg) is shown to be a good pCO2 proxy that is consistent with pCO2 records obtained using biomarker d13C data from Atlantic black shales and leaf stomata data from WIS sections. Boreal chalk d18O records show sea surface temperature (SST) changes that closely follow the Delta13C pCO2 proxy and confirm TEX86 results from deep ocean sites. Rising pCO2 and SST during the Late Cenomanian is attributed to volcanic degassing; pCO2 and SST maxima occurred at the onset of black shale deposition, followed by falling pCO2 and cooling due to carbon sequestration by marine organic productivity and preservation, and increased silicate weathering. A marked pCO2 minimum (~25% fall) occurred with a SST minimum (Plenus Cold Event) showing >4°C of cooling in ~40 kyr. Renewed increases in pCO2, SST, and d13C during latest Cenomanian black shale deposition suggest that a continuing volcanogenic CO2 flux overrode further drawdown effects. Maximum pCO2 and SST followed the end of OAE2, associated with a falling nutrient supply during the Early Turonian eustatic highstand.
Coverage:
Latitude: 44.069900 * Longitude: 6.482800
Minimum SECTION, height: 0.00 m * Maximum SECTION, height: 23.50 m
Event(s):
Comment:
SECTION, heigh [m] gives the measured stratigraphic height above base of measured section.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | SECTION, height | Section | m | Geocode | ||
| 2 | Lithologic unit/sequence | Unit | Jarvis, Ian | |||
| 3 | Description | Description | Jarvis, Ian | basal Turonian chalk-marl couplets that may be used for local correlation of Cenomanian-Turonian boundary sections in the SE Vocontian Basin | ||
| 4 | Calcium carbonate | CaCO3 | % | Jarvis, Ian | ||
| 5 | Aluminium oxide | Al2O3 | % | Jarvis, Ian | ||
| 6 | Carbon, organic, total | TOC | % | Jarvis, Ian | ||
| 7 | δ13C, carbonate | δ13C carb | ‰ PDB | Jarvis, Ian | Mass spectrometer Finnigan Delta-V | with respect to VPDB |
| 8 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Jarvis, Ian | Mass spectrometer Finnigan Delta-V | with respect to VPDB |
| 9 | Δδ13C | Δδ13C | ‰ PDB | Jarvis, Ian | Calculated | difference between d13Ccarb and d13Corg, with respect to VPDB |
| 10 | δ18O, carbonate | δ18O carb | ‰ PDB | Jarvis, Ian | Mass spectrometer Finnigan Delta-V | with respect to VPDB |
| 11 | Comment | Comment | Jarvis, Ian |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
454 data points