Marcks, Basia; Santos, Thiago Pereira dos; Lessa, Douglas Villela de Oliveira; Cartagena-Sierra, Alejandra; Berke, Melissa A; Starr, Aidan; Hall, Ian R; Kelly, Roger P; Robinson, Rebecca S (2022): Opal mass accumulation rates from IODP Site 361-U1475 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.945841, In: Marcks, B et al. (2022): Foraminifera bound nitrogen isotope values, biogenic silica mass accumulation, and abundance of Neogloboquadrina pachyderma at IODP Site 361-U1475, Agulhas Plateau, spanning the MPT (600 - 1200 ka) [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.946021
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Abstract:
Biogenic silica accumulation was obtained by analyzing approximately 200 mg of homogenized and freeze dried sediment for each sample. Cleaning, chemical treatment, and measurement followed protocols outlined in (Mortlock & Froelich, 1989, doi:10.1016/0198-0149(89)90092-7). Samples were measured with a UV Vis spectrophotometer at 812 nm wavelength. Full procedural replicates were performed on 163 of the 435 samples yielding an average standard deviation of 0.2 %. Samples were referenced to RICCA VerSpec SiO32- in 1 % NaOH for intercomparison. Opal mass accumulation rates were calculated by multiplying the fraction of opal by dry bulk density and sedimentation rates from Starr et al. (2021, doi:10.1038/s41586-020-03094-7).
Keyword(s):
Funding:
National Science Foundation (NSF), grant/award no. 1737218: Tracking the Subtropical Front across the Mid-Pleistocene Transition Using Sea Surface Temperature and Nutrients
Coverage:
Median Latitude: -41.427000 * Median Longitude: 25.260750 * South-bound Latitude: -41.427000 * West-bound Longitude: 25.260000 * North-bound Latitude: -41.427000 * East-bound Longitude: 25.261000
Date/Time Start: 2016-02-24T01:55:00 * Date/Time End: 2016-02-27T04:15:00
Minimum Elevation: -2682.9 m * Maximum Elevation: -2680.4 m
Event(s):
361-U1475B * Latitude: -41.427000 * Longitude: 25.261000 * Date/Time: 2016-02-24T01:55:00 * Elevation: -2680.5 m * Penetration: 243.9 m * Recovery: 250.31 m * Campaign: Exp361 (South African Climates (Agulhas LGM Density Profile)) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 26 cores, 0 m drilled, 103% recovery
361-U1475C * Latitude: -41.427000 * Longitude: 25.261000 * Date/Time: 2016-02-25T04:55:00 * Elevation: -2680.4 m * Penetration: 275 m * Recovery: 280.7 m * Campaign: Exp361 (South African Climates (Agulhas LGM Density Profile)) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores, 3 m drilled, 103% recovery
361-U1475E * Latitude: -41.427000 * Longitude: 25.261000 * Date/Time: 2016-02-27T04:15:00 * Elevation: -2682.9 m * Penetration: 277 m * Recovery: 277.2 m * Campaign: Exp361 (South African Climates (Agulhas LGM Density Profile)) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores, 6.5 m drilled, 102% recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Marcks, Basia | |||
| 2 | Sample code/label | Sample label | Marcks, Basia | |||
| 3 | Age model | Age model | ka | Marcks, Basia | Age model (Starr et al., 2021) | |
| 4 | Opal, biogenic silica | bSiO2 | % | Marcks, Basia | Calculated, see abstract | |
| 5 | Accumulation rate, biogenic silica | Acc rate bSiO2 | g/cm2/ka | Marcks, Basia | Calculated, see abstract |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1748 data points