Baltuck, Miriam (1987): (Table 1) Carbon and oxygen isotope composition of carbonate sediments at DSDP Hole 93-603B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.788993, Supplement to: Baltuck, M (1987): Geochemistry, carbon and oxygen stable isotope composition, and diagenetic textural features of lower Cretaceous pelagic cyclic sediments from the western North Atlantic, Deep Sea Drilling Project Hole 603B. In: van Hinte, JE; Wise, SW Jr; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 93, 989-995, https://doi.org/10.2973/dsdp.proc.93.138.1987
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Abstract:
Compositional, textural, and oxygen and carbon stable isotopic analysis of Lower Cretaceous pelagic cyclic sediment is necessary in order to understand the mechanisms causing isotopic fluctuation. Pelagic cycles consist of dark, laminated marl, containing 75-80% CaCO3 and typically about 0.5% organic carbon, alternating with lighter, bioturbated limestone (about 90% CaCO3 and 0.1% organic carbon). The dark marl consistently contains heavier d18O and d13C than the light limestone. Scannning electron microscope observations indicate significant dissolution and diagenetic precipitation of carbonate in the limestone but only minor precipitation of carbonate in the dark marl. This suggests that lighter oxygen in the limestone has its origin in diagenetic precipitation at elevated burial temperatures. The shift toward heavier carbon in the marl end member may have more basis in changing paleoceanographic conditions.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 35.495200 * Longitude: -70.028500
Date/Time Start: 1983-05-05T00:00:00 * Date/Time End: 1983-05-05T00:00:00
Minimum Elevation: -4633.0 m * Maximum Elevation: -4633.0 m
Event(s):
93-603B * Latitude: 35.495200 * Longitude: -70.028500 * Date/Time: 1983-05-05T00:00:00 * Elevation: -4633.0 m * Penetration: 1576.2 m * Recovery: 485.6 m * Campaign: Leg93 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 74 cores; 674.6 m cored; 0 m drilled; 72 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Baltuck, Miriam | DSDP/ODP/IODP sample designation | ||
| 2 | Lithology/composition/facies | Lithology | Baltuck, Miriam | Visual description | ||
| 3 | δ18O, carbonate | δ18O carb | ‰ PDB | Baltuck, Miriam | see reference(s) | |
| 4 | δ13C, carbonate | δ13C carb | ‰ PDB | Baltuck, Miriam | see reference(s) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
84 data points
Data
| 1 Sample label | 2 Lithology | 3 δ18O carb [‰ PDB] | 4 δ13C carb [‰ PDB] |
|---|---|---|---|
| 93-603B-49-4,19-20 | Laminated light limestone | -2.88 | 0.23 |
| 93-603B-49-4,20-21 | Laminated light limestone | -2.89 | 0.28 |
| 93-603B-49-4,75-76 | Darker marl | -2.90 | 0.40 |
| 93-603B-51-2,58-59 | Laminated light limestone | -2.63 | -1.57 |
| 93-603B-57-2,135-136 | Slightly bioturbated medium marl | -3.83 | 0.24 |
| 93-603B-62-5,29-30 | Slightly bioturbated marl | -4.27 | -0.04 |
| 93-603B-66-2,49-50 | White bioturbated limestone | -4.29 | 0.93 |
| 93-603B-71-6,80-81 | Light laminated slightly bioturbated limestone | -4.22 | 1.14 |
| 93-603B-74-2,95-96 | White bioturbated limestone | -5.11 | 1.71 |
| 93-603B-74-2,118-119 | Very dark marl | -2.44 | 1.45 |
| 93-603B-74-2,120-121 | Dark marl | -1.66 | 2.43 |
| 93-603B-74-2,134-135 | Dark laminated marl | -2.65 | 1.99 |
| 93-603B-74-2,150-151 | White limestone | -4.42 | 1.58 |
| 93-603B-77-1,79-80 | White limestone | -3.69 | 1.03 |
| 93-603B-77-1,95-96 | Laminated marl | -2.84 | 1.34 |
| 93-603B-77-1,105-106 | White limestone | -4.06 | 1.07 |
| 93-603B-77-1,116-117 | Medium dark laminated marl | -2.08 | 1.67 |
| 93-603B-771,129-130 | White limestone | -3.93 | 1.15 |
| 93-603B-82-3,86-87 | Dark laminated marl | -2.17 | 1.60 |
| 93-603B-82-3,100-101 | White limestone | -4.28 | 1.19 |
| 93-603B-82-3,122-123 | Dark bioturbated marl | -2.98 | 1.72 |