(Table 2) Neodymium isotopic analysis from different ODP Holes
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2014
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| _version_ | 1867171831028383744 |
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| author | Thomas, Deborah J Tilghman, David S |
| author_facet | Thomas, Deborah J Tilghman, David S |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_839734 |
| institution | PANGAEA |
| language | en |
| publishDate | 2014 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 2) Neodymium isotopic analysis from different ODP Holes Thomas, Deborah J Tilghman, David S 122-763B; 122-763C; 123-765C; 123-766A; 183-1138A; AGE; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Indian Ocean; Joides Resolution; Latitude of event; Leg122; Leg123; Leg183; Longitude of event; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Ocean Drilling Program; ODP; Sample code/label; South Indian Ridge, South Indian Ocean; ε-Neodymium (T) 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. |
| title | (Table 2) Neodymium isotopic analysis from different ODP Holes |
| topic | 122-763B; 122-763C; 123-765C; 123-766A; 183-1138A; AGE; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Indian Ocean; Joides Resolution; Latitude of event; Leg122; Leg123; Leg183; Longitude of event; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Ocean Drilling Program; ODP; Sample code/label; South Indian Ridge, South Indian Ocean; ε-Neodymium (T) |
| url | https://doi.org/10.1594/PANGAEA.839734 |