Li, Chen; Clementi, Vincent; Bova, Samantha C; Rosenthal, Yair; Childress, Laurel; Wright, James D; Jian, Zhimin (2022): Age model, biogenic opal contents and sedimentary U/Th for sites J1002 and J1007, Chilean Margin [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.946044
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Abstract:
Sediment cores at sites J1002 and J1007 were collected from the Chilean Margin during D/V JOIDES Resolution Expedition 379T (JR100) in 2019. Sedimentary Green/Blue (G/B) ratio and sedimentary U/Th derived from natural gamma radiation data were collected during the expedition. We generated age models for sites J1002 and J1007 with radiocarbon dates and visual correlation of δ18O records of benthic foraminifera to the LR04 benthic stack. Measured biogenic opal contents and organic carbon contents were compared to the G/B to test the utility of G/B as a proxy for diatom productivity at Sites J1002 and J1007. Sedimentary U/Th was further used as a non-quantitative indicator of redox conditions of the sediments. Lastly, we calculated the opal mass accumulation rate (MAR) at Site J1007 over the last ~150,000 years. Laboratory measurements in this study were conducted in 2020 at Rutgers University.
Keyword(s):
Related to:
Li, Chen; Clementi, Vincent; Bova, Samantha C; Rosenthal, Yair; Childress, L B; Wright, James D; Jian, Zhimin; Expedition 379T Scientists (2022): The sediment green‐blue color ratio as a proxy for biogenic silica productivity along the Chilean Margin. Geochemistry, Geophysics, Geosystems, https://doi.org/10.1029/2022GC010350
Funding:
Ministry of Science and Technology of the People's Republic of China (MOST), grant/award no. 2018YFE0202401
National Science Foundation (NSF), grant/award no. 1756241: Digging Deeper with the JR100: Extending high resolution paleoclimate records from the Chilean Margin to the Eemian
Coverage:
Median Latitude: -40.626304 * Median Longitude: -74.532494 * South-bound Latitude: -46.071607 * West-bound Longitude: -75.687167 * North-bound Latitude: -36.542327 * East-bound Longitude: -73.666490
Date/Time Start: 2019-07-31T22:08:00 * Date/Time End: 2019-08-13T16:30:00
Event(s):
379T-J1002 * Latitude: -46.071607 * Longitude: -75.687167 * Date/Time Start: 2019-07-31T22:08:00 * Date/Time End: 2019-08-03T13:30:00 * Elevation: -1534.8 m * Campaign: Exp379T * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL)
379T-J1007 * Latitude: -36.542327 * Longitude: -73.666490 * Date/Time Start: 2019-08-12T09:10:00 * Date/Time End: 2019-08-13T16:30:00 * Elevation: -787.1 m * Campaign: Exp379T * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL)
Comment:
Further funding: NETL Methane Hydrates Fellowship Program
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
7 datasets
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Datasets listed in this bundled publication
- Li, C; Clementi, V; Bova, SC et al. (2022): Radiocarbon dates and benthic foraminifer (Uvigerina spp.) tie points for sites J1002 and J1007, Chilean Margin. https://doi.org/10.1594/PANGAEA.946053
- Li, C; Clementi, V; Bova, SC et al. (2022): Organic carbon percentage for site J1007, Chilean Margin. https://doi.org/10.1594/PANGAEA.946043
- Li, C; Clementi, V; Bova, SC et al. (2022): Measured biogenic opal percentage for sites J1002 and J1007, Chilean Margin. https://doi.org/10.1594/PANGAEA.946045
- Li, C; Clementi, V; Bova, SC et al. (2022): Reconstructed biogenic opal percentage for site J1002, Chilean Margin. https://doi.org/10.1594/PANGAEA.946048
- Li, C; Clementi, V; Bova, SC et al. (2022): Reconstructed biogenic opal percentage and accumulation for site J1007, Chilean Margin. https://doi.org/10.1594/PANGAEA.946050
- Li, C; Clementi, V; Bova, SC et al. (2022): Uranium and thorium concentrations for sites J1002, Chilean Margin. https://doi.org/10.1594/PANGAEA.946051
- Li, C; Clementi, V; Bova, SC et al. (2022): Uranium and thorium concentrations for sites J1007, Chilean Margin. https://doi.org/10.1594/PANGAEA.946052