Thomas, Deborah J; Tilghman, David S (2014): (Table 2) Neodymium isotopic analysis from different ODP Holes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.839734
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Abstract:
Oceanic Anoxic Event (OAE) 2 coincided with the Cenomanian-Turonian boundary ~93.9 Ma, and was one of the two most prominent and globally significant of the major mid-Cretaceous OAEs. A confluence of global warming, major large igneous province volcanism, and intensified hydrologic cycling preconditioned the earth system for widespread preservation of organic matter during OAE2; however the ultimate necessary ingredient was enhanced nutrient availability in oceanic surface waters. Here we present new Cenomanian-Turonian interval seawater Neodymium isotope data from the proto-Indian Ocean that demonstrates increased water column stratification during the pre- and post-OAE2 interval, punctuated by a transient decrease in this stratification immediately prior to the onset of OAE2 recorded at Ocean Drilling Program Site 763. The direct oceanographic responses to climate change on both longer- and short-term time scales observed in this region are distinct from those recorded in the northern, tropical and southern Atlantic basins. The transient de-stratification of the water column in the eastern proto-Indian Ocean likely did not contribute to the accumulation of organic-rich sediments in the region, indicating that weathering and/or hydrothermal inputs promoted enhanced surface water nutrient levels and hence primary productivity.
Related to:
Thomas, Deborah J; Tilghman, David S (2014): Geographically different oceanographic responses to global warming during the Cenomanian–Turonian interval and Oceanic Anoxic Event 2. Palaeogeography, Palaeoclimatology, Palaeoecology, 411, 136-143, https://doi.org/10.1016/j.palaeo.2014.06.014
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -26.126750 * Median Longitude: 105.684276 * South-bound Latitude: -53.551750 * West-bound Longitude: 75.974880 * North-bound Latitude: -15.976000 * East-bound Longitude: 117.575200
Date/Time Start: 1988-08-06T07:30:00 * Date/Time End: 1999-01-31T06:15:00
Minimum DEPTH, sediment/rock: 129.56 m * Maximum DEPTH, sediment/rock: 689.75 m
Event(s):
122-763B * Latitude: -20.587000 * Longitude: 112.208700 * Date/Time Start: 1988-08-06T07:30:00 * Date/Time End: 1988-08-11T21:00:00 * Elevation: -1379.0 m * Penetration: 653.5 m * Recovery: 376.36 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 54 cores; 653.5 m cored; 0 m drilled; 57.6 % recovery
122-763C * Latitude: -20.587000 * Longitude: 112.208500 * Date/Time Start: 1988-08-11T21:00:00 * Date/Time End: 1988-08-17T12:00:00 * Elevation: -1379.0 m * Penetration: 1036.6 m * Recovery: 332.83 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 1036.6 m cored; 0 m drilled; 32.1 % recovery
123-765C * Latitude: -15.976000 * Longitude: 117.575200 * Date/Time Start: 1988-09-11T04:25:00 * Date/Time End: 1988-09-22T10:30:00 * Elevation: -5728.0 m * Penetration: 963.9 m * Recovery: 373.35 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg123 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 65 cores; 613.7 m cored; 0 m drilled; 60.8 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Sample code/label | Sample label | Thomas, Deborah J | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 6 | AGE | Age | ka BP | Geocode | ||
| 7 | Neodymium-143/Neodymium-144 ratio | 143Nd/144Nd | Thomas, Deborah J | |||
| 8 | Neodymium-143/Neodymium-144 ratio, error | 143Nd/144Nd e | ± | Thomas, Deborah J | ||
| 9 | ε-Neodymium (T) | ε-Nd(T) | Thomas, Deborah J | 2 sigma | ||
| 10 | Comment | Comment | Thomas, Deborah J |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
280 data points