Sipp-Alpers, Isaac; Lynch-Stieglitz, Jean; Vollmer, Tyler; Marchitto, Thomas M (2025): Isotopic and trace metal records of benthic foraminifera from Florida Straits sediment cores KNR166-2-JPC80 and KNR166-2-GGC73 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.985385
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Published: 2025-09-29 • DOI registered: 2025-10-28
Abstract:
Two collocal cores were recovered at approx. 542 meters depth in the Bahamas side of the Florida Straits. Benthic foraminifera species Planulina ariminensis and Hoeglundina elegans, as well as Globobulimina spp., were picked from the greater-than 250-micron size fraction. Mass spectrometry methods were used to analyze P. ariminensis and Globobulimina spp. tests for carbon and oxygen isotopic ratios while H. elegans tests were analyzed for the cadmium/calcium, magnesium/calcium, and lithium/calcium ratios. The records extend from the Late Holocene to the Penultimate Glacial Maximum (Marine Isotope Stage [MIS] 6), with high sedimentation rates during peak interglacial periods (MIS 1 and 5e).
Keyword(s):
Supplement to:
Sipp-Alpers, Isaac; Lynch-Stieglitz, Jean; Vollmer, Tyler; Marchitto, Thomas M (in review): Nutrient import into the intermediate-depth Atlantic was high late in the Last Interglacial Period. Paleoceanography and Paleoclimatology
References:
Hoogakker, Babette A A; Davis, Catherine V; Wang, Yi; Kusch, Stephanie; Nilsson-Kerr, Katrina; Hardisty, Dalton S; Jacobel, Allison W; Reyes Macaya, Dharma; Glock, Nicolaas; Ni, Sha; Sepúlveda, Julio; Ren, Abby; Auderset, Alexandra; Hess, Anya; Meissner, Katrin J; Cardich, Jorge; Anderson, Robert; Barras, Christine; Basak, Chandranath; Bradbury, Harold J; Brinkmann, Inda; Castillo, A; Cook, M; Costa, Kassandra M; Choquel, Constance; Diz, Paula; Donnenfield, Jonas T; Elling, Felix J; Erdem, Zeynep; Filipsson, Helena L; Garrido, Sebastián; Gottschalk, Julia; Govindankutty Menon, Anjaly; Groeneveld, Jeroen; Hallmann, Christian; Hendy, Ingrid L; Hennekam, Rick; Lu, Wanyi; Lynch-Stieglitz, Jean; Matos, Lelia; Martínez-García, Alfredo; Molina, Giulia Silveira; Muñoz, Praxedes; Moretti, Simone; Morford, J L; Nuber, Sophie; Radionovskaya, Svetlana; Raven, Morgan Reed; Somes, Christopher J; Studer, Anja S; Tachikawa, Kazuyo; Tapia, Raúl; Tetard, Martin; Vollmer, Tyler; Wang, Xingchen; Wu, Shuzhuang; Zhang, Yan; Zheng, Xin-Yuan; Zhou, Yuxin (2025): Reviews and syntheses: Review of proxies for low-oxygen paleoceanographic reconstructions. Biogeosciences, 22(4), 863-957, https://doi.org/10.5194/bg-22-863-2025
Marchitto, Thomas M; Bryan, Sean P; Doss, Whitney; McCulloch, Malcolm T; Montagna, P (2018): A simple biomineralization model to explain Li, Mg, and Sr incorporation into aragonitic foraminifera and corals. Earth and Planetary Science Letters, 481, 20-29, https://doi.org/10.1016/j.epsl.2017.10.022
Funding:
Coverage:
Median Latitude: 23.741000 * Median Longitude: -79.422608 * South-bound Latitude: 23.736500 * West-bound Longitude: -79.429700 * North-bound Latitude: 23.745500 * East-bound Longitude: -79.415517
Date/Time Start: 2002-01-16T00:00:00 * Date/Time End: 2002-01-17T05:00:00
Minimum DEPTH, sediment/rock: 0.0025 m * Maximum DEPTH, sediment/rock: 10.9775 m
Event(s):
KNR166-2-73 (KNR166-2-73GGC) * Latitude: 23.745500 * Longitude: -79.429700 * Date/Time: 2002-01-16T00:00:00 * Elevation: -542.0 m * Recovery: 3.96 m * Location: Florida Strait * Campaign: KNR166-2 (KN166-2) * Basis: Knorr * Method/Device: Gravity corer (GC)
KNR166-2-80 (KNR166-2-JPC80) * Latitude: 23.736500 * Longitude: -79.415517 * Date/Time: 2002-01-17T05:00:00 * Elevation: -543.0 m * Recovery: 3.96 m * Location: Florida Strait * Campaign: KNR166-2 (KN166-2) * Basis: Knorr * Method/Device: Piston corer (PC)
Comment:
Elemental ratios were measured by reductively and oxidatively cleaning the samples following Boyle and Rosenthal (1996), and then using a Thermo Finnigan Element2 Magnetic Sector Inductively Coupled Plasma-Mass Spectrometer (ICP-MS) at the Institute of Alpine and Arctic Research, University of Colorado, Boulder (INSTAAR) according to the methods of Marchitto (2006).
Stable oxygen and carbon isotopic ratio data (δ18O and δ13C, respectively) for all samples of P. ariminensis and 51 out of 70 total samples of Globobulimina spp. were acquired using a Thermo MAT 253 with Kiel carbonate preparation device at the Georgia Institute of Technology (GT). 19 replicate samples of Globobulimina were analyzed at the University of Arizona with the same methods.
The temperature reconstruction uses the Mg/Li-based calibration proposed by Marchitto et al. (2018)
The oxygen content reconstruction uses the benthic foraminiferal epifaunal-infaunal δ13C gradient proxy, specifically the recently updated calibration described in Hoogakker et al. (2025).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Sipp-Alpers, Isaac | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Sipp-Alpers, Isaac | Geocode | |
| 3 | AGE | Age | ka BP | Sipp-Alpers, Isaac | Geocode | |
| 4 | Planulina ariminensis, δ18O | P. ariminensis δ18O | ‰ PDB | Sipp-Alpers, Isaac | Isotope Ratio mass spectrometer, Thermo Fisher Scientific, ThermoScientific, MAT 253 | vs. VPDB, size fraction >250 µm |
| 5 | Planulina ariminensis, δ13C | P. ariminensis δ13C | ‰ PDB | Sipp-Alpers, Isaac | Isotope Ratio mass spectrometer, Thermo Fisher Scientific, ThermoScientific, MAT 253 | vs. VPDB, size fraction >250 µm |
| 6 | Globobulimina spp., δ18O | Globobulimina spp. δ18O | ‰ PDB | Sipp-Alpers, Isaac | Isotope Ratio mass spectrometer, Thermo Fisher Scientific, ThermoScientific, MAT 253 | vs. VPDB, size fraction >250 µm |
| 7 | Globobulimina spp., δ13C | Globobulimina spp. δ13C | ‰ PDB | Sipp-Alpers, Isaac | Isotope Ratio mass spectrometer, Thermo Fisher Scientific, ThermoScientific, MAT 253 | vs. VPDB, size fraction >250 µm |
| 8 | Oxygen | O2 | µmol/kg | Sipp-Alpers, Isaac | Calculated according to Hoogakker et al., 2025 | |
| 9 | Hoeglundina elegans, Cadmium/Calcium ratio | H. elegans Cd/Ca | µmol/mol | Sipp-Alpers, Isaac | ICP-MS, Thermo Finnigan, Element 2 | |
| 10 | Cadmium/Calcium ratio | Cd/Ca | µmol/mol | Sipp-Alpers, Isaac | ICP-MS, Thermo Finnigan, Element 2 | water |
| 11 | Hoeglundina elegans, Magnesium/Lithium ratio | H. elegans Mg/Li | mmol/mol | Sipp-Alpers, Isaac | ICP-MS, Thermo Finnigan, Element 2 | |
| 12 | Bottom water temperature | BWT | °C | Sipp-Alpers, Isaac | Calculated according to Marchitto et al. (2018). |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1644 data points