Nohara, Masato; Ishizuka, Toshio; Gieskes, Joris M (1984): (Table 1) Organic carbon isotopic composition in Cretaceous sediments at DSDP Hole 75-530A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.810236, Supplement to: Nohara, M et al. (1984): Organic carbon isotopic composition in Cretaceous sediments, Angola Basin, southeastern Atlantic, Deep Sea Drilling Project Site 530. In: Hay, WW; Sibuet, J-C; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 75, 1051-1054, https://doi.org/10.2973/dsdp.proc.75.136.1984
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Abstract:
Cretaceous sediments from DSDP Site 530 have been analyzed for organic carbon isotopic composition. The d13C values in the sediments decrease from -22.7 per mil to -27.5 per mil in the following order: light-olive green mudstone/claystone, dark brown-red mudstone/siltstone/claystone, and black shale. This large range is primarily the result of variation in the relative amounts of terrestrial organic carbon superimposed on that derived from marine organisms.
The black shales have an average d13C value of -25.9 per mil (range is from -23.7 per mil to -27.5 per mil). These values indicate that they originated primarily in terrigenous organic materials.
The average d13C value present throughout the Cretaceous suggests that a large amount of terrestrial organic matter was supplied into this paleoenvironment, except during the Campanian, when an average d13C of -23.9 per mil is found near the marine end of the range.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -19.187700 * Longitude: 9.385800
Date/Time Start: 1980-07-29T00:00:00 * Date/Time End: 1980-07-29T00:00:00
Minimum Elevation: -4629.0 m * Maximum Elevation: -4629.0 m
Event(s):
75-530A * Latitude: -19.187700 * Longitude: 9.385800 * Date/Time: 1980-07-29T00:00:00 * Elevation: -4629.0 m * Penetration: 1121 m * Recovery: 617.5 m * Location: South Atlantic/RIDGE * Campaign: Leg75 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 107 cores; 986.5 m cored; 9.5 m drilled; 62.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Nohara, Masato | DSDP/ODP/IODP sample designation | ||
| 2 | Carbon, organic, total | TOC | % | Nohara, Masato | see reference(s) | |
| 3 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Nohara, Masato | Mass spectrometer Varian MAT 250 | |
| 4 | Stage | Stage | Nohara, Masato | Revisions of stratigraphic ages are given in Steinmetz et al., 1984 (doi:10.2973/dsdp.proc.75.105.1984) | ||
| 5 | Lithology/composition/facies | Lithology | Nohara, Masato |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
176 data points