Ravizza, Gregory E; Peucker-Ehrenbrink, Bernhard (2003): (Table S1) Marine Os isotope record across the Cretaceous-Tertiary boundary [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.785724, Supplement to: Ravizza, GE; Peucker-Ehrenbrink, B (2003): Chemostratigraphic Evidence of Deccan Volcanism from the Marine Osmium Isotope Record. Science, 302(5629), 1392-1395, https://doi.org/10.1126/science.1089209
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Abstract:
Continental flood basalt (CFB) volcanism is hypothesized to have played a causative role in global climate change and mass extinctions. Uncertainties associated with radiometric dating preclude a clear chronological assessment of the environmental consequences of CFB volcanism. Our results document a 25% decline in the marine 187Os/188Os record that predates the Cretaceous-Tertiary boundary (KTB) and coincides with late Maastrichtian warming. We argue that this decline provides a chemostratigraphic marker of Deccan volcanism and thus constitutes compelling evidence that the main environmental consequence of Deccan volcanism was a transient global warming event of 3° to 5°C that is fully resolved from the KTB mass extinction.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -9.387544 * Median Longitude: 71.003444 * South-bound Latitude: -31.533700 * West-bound Longitude: 2.985300 * North-bound Latitude: 32.441767 * East-bound Longitude: 157.723233
Date/Time Start: 1972-08-03T00:00:00 * Date/Time End: 1982-05-23T00:00:00
Minimum DEPTH, sediment/rock: 369.00 m * Maximum DEPTH, sediment/rock: 479.90 m
Event(s):
25-245 * Latitude: -31.533700 * Longitude: 52.301800 * Date/Time: 1972-08-03T00:00:00 * Elevation: -4857.0 m * Penetration: 396.5 m * Recovery: 82 m * Location: Indian Ocean//BASIN * Campaign: Leg25 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 144.5 m cored; 6 m drilled; 56.7 % recovery
74-525A * Latitude: -29.070700 * Longitude: 2.985300 * Date/Time: 1980-06-10T00:00:00 * Elevation: -2467.0 m * Penetration: 678.1 m * Recovery: 406.6 m * Location: South Atlantic/CREST * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 62 cores; 549.7 m cored; 6 m drilled; 74 % recovery
86-577_Site * Latitude: 32.441767 * Longitude: 157.723233 * Date/Time: 1982-05-23T00:00:00 * Elevation: -2675.0 m * Penetration: 3.561 m * Recovery: 2.316 m * Location: North Pacific * Campaign: Leg86 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 27 cores; 251.7 m cored; 0 m drilled; 92% recovery
Comment:
Sediment depth is given in mbsf. For Atlantic and Pacific sites age models are based on linear interpolation between magnetic reversal boundaries and the KTB. For the Indian Ocean the age model is based solely on biostratigraphy and is less well constrained.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Ravizza, Gregory E | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Depth, relative | Depth rel | m | Ravizza, Gregory E | relative to K/T boundary | |
| 5 | AGE | Age | ka BP | Geocode | ||
| 6 | Osmium-187/Osmium-188 ratio | 187Os/188Os | Ravizza, Gregory E | Negative-thermal ionization mass spectrometry (N-TIMS) | ||
| 7 | Osmium-187/Osmium-188, error | 187Os/188Os e | ± | Ravizza, Gregory E | Negative-thermal ionization mass spectrometry (N-TIMS) | 2 sigma |
| 8 | Osmium | Os | ng/kg | Ravizza, Gregory E | Negative-thermal ionization mass spectrometry (N-TIMS) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
109 data points