Griffith, Elizabeth M; Paytan, Adina; Caldeira, Kenneth; Bullen, Thomas D; Thomas, Ellen (2008): (Table S1) Calcium isotope ratios of Pacific Ocean sediments [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.771861, Supplement to: Griffith, EM et al. (2008): A dynamic marine calcium cycle during the past 28 million years. Science, 322(5908), 1671-7674, https://doi.org/10.1126/science.1163614
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Abstract:
Multiple lines of evidence have shown that the isotopic composition and concentration of calcium in seawater have changed over the past 28 million years. A high-resolution, continuous seawater calcium isotope ratio curve from marine (pelagic) barite reveals distinct features in the evolution of the seawater calcium isotopic ratio suggesting changes in seawater calcium concentrations. The most pronounced increase in the d44/40Ca value of seawater (of 0.3 per mil) occurred over roughly 4 million years following a period of low values around 13 million years ago. The major change in marine calcium corresponds to a climatic transition and global change in the carbon cycle and suggests a reorganization of the global biogeochemical system.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 4.780268 * Median Longitude: -132.150002 * South-bound Latitude: 0.498500 * West-bound Longitude: -142.015650 * North-bound Latitude: 8.889450 * East-bound Longitude: -113.842000
Date/Time Start: 1982-03-22T00:00:00 * Date/Time End: 2001-11-23T00:00:00
Minimum DEPTH, sediment/rock: 3.85 m * Maximum DEPTH, sediment/rock: 417.70 m
Event(s):
85-572_Site * Latitude: 1.434800 * Longitude: -113.842000 * Date/Time: 1982-03-22T00:00:00 * Elevation: -3893.0 m * Penetration: 10.033 m * Recovery: 6.021 m * Location: North Pacific Ocean * Campaign: Leg85 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 76 cores; 674.1 m cored; 9.2 m drilled; 89.3% recovery
85-573B * Latitude: 0.498500 * Longitude: -133.309500 * Date/Time: 1982-04-02T00:00:00 * Elevation: -4301.0 m * Penetration: 529 m * Recovery: 279.7 m * Location: North Pacific/TROUGH * Campaign: Leg85 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 390 m cored; 0 m drilled; 71.7 % recovery
85-574_Site * Latitude: 4.208700 * Longitude: -133.330200 * Date/Time: 1982-04-11T00:00:00 * Elevation: -4561.0 m * Penetration: 11.197 m * Recovery: 5.949 m * Location: North Pacific/TROUGH * Campaign: Leg85 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 92 cores; 734.2 m cored; 0 m drilled; 81% recovery
Comment:
Sediment depth is given in mbsf. Age determinations used orbitally tuned ages according to Lourens et al., 2004.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Griffith, Elizabeth M | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | AGE | Age | ka BP | Geocode | ||
| 5 | δ44/40 Ca | δ44/40 Ca | ‰ SRM 915a | Griffith, Elizabeth M | Thermal Ionization Mass Spectrometry (TIMS) | barite |
| 6 | δ44/40 Ca | δ44/40 Ca | ‰ SRM 915a | Griffith, Elizabeth M | Calculated | seawater, d44Ca (seawater) = d44Ca (barite) + 2.01 per mil |
| 7 | δ44/40 Ca, standard deviation | δ44/40 Ca std dev | ± | Griffith, Elizabeth M | Thermal Ionization Mass Spectrometry (TIMS) | 2 sigma mean = 2 sigma/n**0.5 calculated from repeated TIMS measurements of an individual sample |
| 8 | Number | No | Griffith, Elizabeth M | number of TIMS analses on a single sample | ||
| 9 | Comment | Comment | Griffith, Elizabeth M |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
249 data points