deLong, Kimberly; Blackburn, Terrence; Caissie, Beth; Addison, Jason A; Stroynowski, Zuzanna N; Reimi Sipala, Maria; Marcantonio, Franco; Ravelo, Ana Christina (2025): Silicon isotopes from IODP Site 323-U1340 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.974823
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Published: 2025-02-13 • DOI registered: 2025-03-14
Abstract:
The Bølling-Allerød deglacial event is marked by high diatom productivity and opal deposition throughout the subarctic Pacific. To investigate the cause of this event, we quantified several productivity-related sedimentary parameters that reflect the near-surface biogeochemistry from the Integrated Ocean Drilling Program (IODP) Site 323-U1340 in the Bering Sea. Silicon isotopes (δ29Si and δ30Si) from single-genus Coscinodiscus diatom frustules. Diatom silicon isotope values were generated in the Keck Laboratory at the University of California, Santa Cruz using the following methods. Freeze-dried samples were washed on a 63μm sieve to remove clays and dried in a 55°C oven. Samples were then cleaned with the M2 method, without the Calgon step, in non-glass containers and again oven-dried. To isolate a single diatom genus, samples were dry-sieved and ice rafted debris, radiolarians, spicules, and other genera were removed from the 63-125 μm portion by picking under a microscope and visually confirmed to be >99% Coscinodiscus specimens. Coscinodiscus species present were >95% Coscinodiscus marginatus with occasional Coscinodiscus oculus-iridis and Coscinodiscus radiatus. To dissolve samples, ≤0.002 g was transferred to 100 μL of 10 M NaOH in screw-top Teflon vials and reacted in Parr vessels at 200°C for three days. Samples were transferred to BioRad 50W X8 cation exchange columns previously cleaned with HCl and Milli-Q water (after Georg et al., 2006; doi:10.1016/j.chemgeo.2006.06.006), and eluted in Milli-Q water. Intensities of 28Si, 29Si and 30Si were measured using standard-sample bracketing on a Neptune MC ICP-MS at high resolution equipped with an Apex Omega desolvating nebulizer. All values are reported vs. NBS 28.
Keyword(s):
Supplement to:
deLong, Kimberly; Blackburn, Terrence; Caissie, Beth; Addison, Jason A; Stroynowski, Zuzanna N; Sipala, M R; Marcantonio, Franco; Ravelo, Ana Christina (2025): Bølling-Allerød Productivity in the Subarctic Pacific Driven by Seasonal Upwelling. Geophysical Research Letters, 52(8), e2024GL109614, https://doi.org/10.1029/2024GL109614
Coverage:
Median Latitude: 53.398896 * Median Longitude: -179.521415 * South-bound Latitude: 53.396673 * West-bound Longitude: -179.521623 * North-bound Latitude: 53.400013 * East-bound Longitude: -179.521000
Date/Time Start: 2009-07-22T00:00:00 * Date/Time End: 2009-07-22T00:00:00
Minimum Elevation: -1294.7 m * Maximum Elevation: -1293.4 m
Event(s):
323-U1340 * Latitude: 53.400000 * Longitude: -179.521000 * Date/Time: 2009-07-22T00:00:00 * Elevation: -1294.0 m * Location: Bering Sea * Campaign: Exp323 (Bering Sea Paleoceanography) * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE)
323-U1340A * Latitude: 53.400013 * Longitude: -179.521622 * Elevation: -1294.7 m * Recovery: 535.91 m * Campaign: Exp323 (Bering Sea Paleoceanography) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 71 cores; 604.5 m cored; 89 % recovered
323-U1340D * Latitude: 53.396673 * Longitude: -179.521623 * Elevation: -1293.4 m * Recovery: 27.23 m * Campaign: Exp323 (Bering Sea Paleoceanography) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 3 cores; 26.3 m cored; 104 % recovered
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | deLong, Kimberly | |||
| 2 | Sample code/label | Sample label | deLong, Kimberly | DSDP/ODP/IODP sample designation | ||
| 3 | Half | Half | deLong, Kimberly | |||
| 4 | Depth, composite | Depth comp | mcd | deLong, Kimberly | IODP Depth Scale Terminology | |
| 5 | AGE | Age | ka BP | deLong, Kimberly | Age, 14C calibrated, CALIB (Stuiver & Reimer, 1993) | Geocode |
| 6 | δ29Si | δ29Si | ‰ NBS | deLong, Kimberly | Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Neptune Plus; coupled with Apex Omega desolvating nebulizer | |
| 7 | δ29Si, standard deviation | δ29Si std dev | ± | deLong, Kimberly | Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Neptune Plus; coupled with Apex Omega desolvating nebulizer | |
| 8 | δ30Si | δ30Si | ‰ NBS | deLong, Kimberly | Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Neptune Plus; coupled with Apex Omega desolvating nebulizer | |
| 9 | δ30Si, standard deviation | δ30Si std dev | ± | deLong, Kimberly | Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Neptune Plus; coupled with Apex Omega desolvating nebulizer | |
| 10 | Replicates | Repl | # | deLong, Kimberly |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
336 data points