Shackleton, Nicholas J; Hall, Michael A (1984): (Appendix) Oxygen and carbon isotopes in bulk sediments at DSDP Leg 74 Holes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.810420, Supplement to: Shackleton, NJ; Hall, MA (1984): Carbon isotope data from Leg 74 sediments. In: Moore, TC Jr; Rabinowitz, PD; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 74, 613-619, https://doi.org/10.2973/dsdp.proc.74.116.1984
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Published: 1984 (exact date unknown) • DOI registered: 2013-05-17
Abstract:
Carbon and oxygen isotope measurements were made in bulk sediments from the five sites drilled on Leg 74, covering much of the Cenozoic.
These stable carbon isotope analyses document a lightening across the Cretaceous/Tertiary boundary (already documented by other workers), with a minimum about 0.2 Ma after the boundary; a trend to very heavy values in the late Paleocene; a lightening near the Paleocene/Eocene boundary to a second minimum early in the early Eocene; more positive values in the remainder of the Eocene with a minor peak immediately below the Eocene/Oligocene boundary, at which there is a lightening trend; a moderately positive peak in the middle Miocene, and a lightening toward the present, where the isotopically lightest values in the Cenozoic are to be found. The carbon isotope variations observed are largely a function of changes in the 13C content of oceanic dissolved inorganic carbon that resulted from alterations in the global carbon budget. Slight differences among sediments of the same age at different sites probably result from diagenetic changes, but do not obscure the major pattern, which has considerable potential value for stratigraphic correlation.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -28.727640 * Median Longitude: 2.565180 * South-bound Latitude: -29.070700 * West-bound Longitude: 1.763300 * North-bound Latitude: -28.041500 * East-bound Longitude: 2.985300
Date/Time Start: 1980-06-10T00:00:00 * Date/Time End: 1980-07-18T00:00:00
Minimum DEPTH, sediment/rock: 0.10 m * Maximum DEPTH, sediment/rock: 475.86 m
Event(s):
74-525 * Latitude: -29.070700 * Longitude: 2.985300 * Date/Time: 1980-06-10T00:00:00 * Elevation: -2467.0 m * Penetration: 3.6 m * Recovery: 3.6 m * Location: South Atlantic/CREST * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 cores; 3.6 m cored; 0 m drilled; 99.7 % 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
74-527 * Latitude: -28.041500 * Longitude: 1.763300 * Date/Time: 1980-06-28T00:00:00 * Elevation: -4428.0 m * Penetration: 384.5 m * Recovery: 243.4 m * Location: South Atlantic Ocean * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 380 m cored; 4.5 m drilled; 64.1 % recovery
Comment:
Sediment depth is given in mbsf. Ages are estimated as described in Shackleton et al. 1984 (doi:10.2973/dsdp.proc.74.117.1984).
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 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | AGE | Age | ka BP | Geocode | ||
| 7 | δ18O, carbonate | δ18O carb | ‰ PDB | Shackleton, Nicholas J | see reference(s) | |
| 8 | δ13C, carbonate | δ13C carb | ‰ PDB | Shackleton, Nicholas J | see reference(s) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1140 data points