Radiocarbon age and chronology of sediment core SK-312/12, along with Magnesium/Calcium and δ¹⁸O measurements on Trilobatus sacculifer (w/s), and paleotemperature and paleosalinity records
Fuente:
PANGAEA
Gespeichert in:
| Hauptverfasser: | , , , , , , , |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867167683235020800 |
|---|---|
| author | Jena, Sanjit Kumar Bhushan, Ravi Jena, Partha Sarathi Bharti, Nisha Sudheer, A K Sanyal, Prasanta Shivam, Ajay Dhabi, Ankur |
| author_facet | Jena, Sanjit Kumar Bhushan, Ravi Jena, Partha Sarathi Bharti, Nisha Sudheer, A K Sanyal, Prasanta Shivam, Ajay Dhabi, Ankur |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Sediment core SK-312/12 was collected from the Equatorial Indian Ocean at 3750m b.s.l.. Radiocarbon age-depth profile was continuous up to 70 cm of the core length. The core was sampled at each 1 cm interval. Nearly alternate sections were processed to separate foraminiferal carbonates from the bulk sediment. Radiocarbon ages were obtained from radiocarbon dating of mixed-layer species Globigerinoides ruber and Trilobatus sacculifer taken in sub-equal amounts from 250-425µm size fraction. The radiocarbon ages were calibrated with respect to the MARINE20 Calibration curve (Heaton et al., 2020) with a modern reservoir age (ΔR) of -54 + 65 yr (Dutta et al., 2001; Southon et al., 2002) under the R package "Bacon" (Blaauw & Christeny, 2011), and the Bayesian chronology was obtained. Stable oxygen isotopic analysis was carried out using 50-100µg of Trilobatus sacculifer (w/s) (250-355µm) shells from individual sample sections. Mg/Ca analysis of Trilobatus sacculifer (w/s) (250-355µm) was carried out following the cleaning protocol developed by Barker et al. 2003, the method for foraminiferal Mg/Ca analysis. Paleotemperature was reconstructed using the equation: Mg/Ca (mmol/mol) = 0.24 * exp(0.097T), given by Hollstein et al., 2017. The seawater oxygen isotopic record was obtained using the equation: T (⁰C) = 17 – 4.52 (δ18Ocarb - δ18Osw) + 0.03 (δ18Ocarb - δ18Osw)2, given by Erez & Luz, 1983. Paleosalinity was reconstructed using the equation: δ18Osw (VSMOW) = -8.89 + 0.27 * Ssw, given by Srivastava et al., 2007. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_974306 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Radiocarbon age and chronology of sediment core SK-312/12, along with Magnesium/Calcium and δ¹⁸O measurements on Trilobatus sacculifer (w/s), and paleotemperature and paleosalinity records Jena, Sanjit Kumar Bhushan, Ravi Jena, Partha Sarathi Bharti, Nisha Sudheer, A K Sanyal, Prasanta Shivam, Ajay Dhabi, Ankur GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes Sediment core SK-312/12 was collected from the Equatorial Indian Ocean at 3750m b.s.l.. Radiocarbon age-depth profile was continuous up to 70 cm of the core length. The core was sampled at each 1 cm interval. Nearly alternate sections were processed to separate foraminiferal carbonates from the bulk sediment. Radiocarbon ages were obtained from radiocarbon dating of mixed-layer species Globigerinoides ruber and Trilobatus sacculifer taken in sub-equal amounts from 250-425µm size fraction. The radiocarbon ages were calibrated with respect to the MARINE20 Calibration curve (Heaton et al., 2020) with a modern reservoir age (ΔR) of -54 + 65 yr (Dutta et al., 2001; Southon et al., 2002) under the R package "Bacon" (Blaauw & Christeny, 2011), and the Bayesian chronology was obtained. Stable oxygen isotopic analysis was carried out using 50-100µg of Trilobatus sacculifer (w/s) (250-355µm) shells from individual sample sections. Mg/Ca analysis of Trilobatus sacculifer (w/s) (250-355µm) was carried out following the cleaning protocol developed by Barker et al. 2003, the method for foraminiferal Mg/Ca analysis. Paleotemperature was reconstructed using the equation: Mg/Ca (mmol/mol) = 0.24 * exp(0.097T), given by Hollstein et al., 2017. The seawater oxygen isotopic record was obtained using the equation: T (⁰C) = 17 – 4.52 (δ18Ocarb - δ18Osw) + 0.03 (δ18Ocarb - δ18Osw)2, given by Erez & Luz, 1983. Paleosalinity was reconstructed using the equation: δ18Osw (VSMOW) = -8.89 + 0.27 * Ssw, given by Srivastava et al., 2007. |
| title | Radiocarbon age and chronology of sediment core SK-312/12, along with Magnesium/Calcium and δ¹⁸O measurements on Trilobatus sacculifer (w/s), and paleotemperature and paleosalinity records |
| topic | GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes |
| url | https://doi.org/10.1594/PANGAEA.974306 |