Andreasen, Gretchen Hampt; Delaney, Margaret Lois (2000): (Table 3) Relative depth and age, CaCO3, δ¹⁸O, δ¹³C and Sr/Ca analysis from ODP Leg 130, 154 and 138 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.767461, Supplement to: Andreasen, GH; Delaney, ML (2000): Lithologic controls on calcite recrystallization in Cenozoic deep-sea sediments. Marine Geology, 163(1-4), 109-124, https://doi.org/10.1016/S0025-3227(99)00109-7
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Abstract:
Interpretations of calcite strontium/calcium records in terms of ocean history and calcite diagenesis require distinguishing the effects on deep-sea calcite sediments of changes in ocean chemistry, of different mixes of calcite-depositing organisms as sediment contributors through time and space, and of the loss of Sr during diagenetic calcite recrystallization. In this paper Sr/Ca and d18O values of bulk calcium carbonate sediments are used to estimate the relative extent of calcite recrystallization in samples from four time points (core tops, 5.6, 9.4, and 37.1 Ma) at eight Ocean Drilling Program sites in the equatorial Atlantic (Ceara Rise) and equatorial Pacific (Ontong Java Plateau and two eastern equatorial Pacific sites). The possibility that site-to-site differences in calcite Sr/Ca at a given time point originated from temporal variations in ocean chemistry was eliminated by careful age control of samples for each time point, with sample ages differing by less than the oceanic residence times of Sr and Ca. The Sr/Ca and d18O values of 5.6- and 9.4-Ma samples from the less-carbonate-rich eastern equatorial Pacific sites and Ceara Rise Site 929 appear to be less diagenetically altered than the Sr/Ca and d18O values of contemporaneous samples from the more carbonate-rich sites. It is evident from these data that both Sr/Ca and d18O in bulk calcite have been diagenetically altered in some samples 5.6 Ma and older. These data indicate that noncarbonate sedimentary components, like clay and biogenic silica, have partially suppressed recrystallization at the lower carbonate sites. Sr/Ca data from the less altered, carbonate-poor sites indicate higher oceanic Sr/Ca relative to today at 5.6 and 9.4 Ma.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 2.960442 * Median Longitude: -123.712274 * South-bound Latitude: -3.094930 * West-bound Longitude: 156.625000 * North-bound Latitude: 7.921310 * East-bound Longitude: -43.488900
Date/Time Start: 1990-01-31T00:45:00 * Date/Time End: 1994-03-21T08:45:00
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 987.32 m
Event(s):
130-803D * Latitude: 2.433000 * Longitude: 160.541000 * Date/Time Start: 1990-01-31T00:45:00 * Date/Time End: 1990-02-07T03:30:00 * Elevation: -3412.2 m * Penetration: 656 m * Recovery: 494.96 m * Location: North Pacific Ocean * Campaign: Leg130 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 71 core; 656 m cored; 0 m drilled; 75.5 % recovery
130-804A * Latitude: 0.937000 * Longitude: 161.650000 * Date/Time Start: 1990-02-07T15:45:00 * Date/Time End: 1990-02-08T07:00:00 * Elevation: -3861.7 m * Penetration: 48.7 m * Recovery: 50.52 m * Location: North Pacific Ocean * Campaign: Leg130 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 48.7 m cored; 0 m drilled; 103.7 % recovery
130-804B * Latitude: 0.937000 * Longitude: 161.650000 * Date/Time Start: 1990-02-08T07:00:00 * Date/Time End: 1990-02-08T23:30:00 * Elevation: -3860.7 m * Penetration: 137.7 m * Recovery: 141.61 m * Location: North Pacific Ocean * Campaign: Leg130 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 137.7 m cored; 0 m drilled; 102.8 % recovery
Comment:
Sediment depth is given in mbsf. The Parameter AGE are not meant to represent the ''best'' possible age estimates, but to most accurately indicate the relative ages of samples within and between sites.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Andreasen, Gretchen Hampt | |||
| 3 | Datum level | DL | Andreasen, Gretchen Hampt | * = Indicates the sample closest to a datum relative to the other samples in the age cluster. Blank indicates no analysis for this property of this sample. | ||
| 4 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 5 | AGE | Age | ka BP | Geocode | ||
| 6 | Depth, relative | Depth rel | m | Andreasen, Gretchen Hampt | relative to datum | |
| 7 | Age, relative | Age rel | ka | Andreasen, Gretchen Hampt | relative to datum | |
| 8 | Calcium carbonate | CaCO3 | % | Andreasen, Gretchen Hampt | ||
| 9 | δ18O, carbonate | δ18O carb | ‰ PDB | Andreasen, Gretchen Hampt | Isotope ratio mass spectrometry | |
| 10 | δ13C, carbonate | δ13C carb | ‰ PDB | Andreasen, Gretchen Hampt | Isotope ratio mass spectrometry | |
| 11 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Andreasen, Gretchen Hampt |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
405 data points