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OAS accession Detail for 0294380
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| accessions_id: | 0294380 | archive |
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| Title: | Seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT), 2010 and 2011 on cruises KN199-04 and KN204-01, analyzed at LDEO (NCEI Accession 0294380) |
| Abstract: | This dataset contains chemical data collected on R/V Knorr during cruises KN199-04 and KN204-01 in the North Atlantic Ocean from 2010-10-16 to 2011-12-10. These data include Nd, Nd143_144, and depth. The instruments used to collect these data include CTD Sea-Bird, GeoFish Towed near-Surface Sampler, Mass Spectrometer, and Niskin bottle. These data were collected by Leopoldo D. Pena Gonzalez and Steven L. Goldstein of Lamont-Doherty Earth Observatory, Katharina Pahnke-May of University of Hawaii, Torben Stichel of University of Hawaii at Manoa, and Howard Scher of University of South Carolina as part of the "U.S. GEOTRACES North Atlantic Transect (U.S. GEOTRACES NAT)" project and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-05-13. The following is the text of the dataset description provided by BCO-DMO: seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT) Dataset Description: These data are from the Lamont-Doherty Earth Observatory (LDEO) of Columbia University. Please contact the PI for further information. See also associated data from the University of South Carolina ( USC ) and the University of Hawaii at Manoa () |
| Date received: | 20220513 |
| Start date: | 20101016 |
| End date: | 20111210 |
| Seanames: | North Atlantic Ocean |
| West boundary: | -69.55 |
| East boundary: | -15.996 |
| North boundary: | 39.35 |
| South boundary: | 17.35 |
| Observation types: | chemical |
| Instrument types: | CTD, Flow-through pump, mass spectrometer, Niskin bottle |
| Datatypes: | METALS |
| Submitter: | |
| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
| Collecting institutions: | Columbia University; Lamont-Doherty Earth Observatory, The University of Hawai'i System, University of Hawai'i at Mānoa, University of South Carolina |
| Contributing projects: | GEOTRACES |
| Platforms: | Knorr (316N) |
| Number of observations: | |
| Supplementary information: | Acquisition Description: Methodology: A detailed description can be found in Stichel et al. (2015). See the links below for summaries of the described methodology from the paper. KN199-04 Methodology (pdf) KN204-01 Methodology (pdf) Fig. 1: Sample locations for the Intermediate Data Product. References: (References listed in the data are codes [1], [2], or [3], corresponding with the following publications/manuscripts) [1] Stichel, T., Hartman, A.E., Duggan, B., Goldstein, S.L., Scher, H., Pahnke, K., 2015. Separating biogeochemical cycling of neodymium from water mass mixing in the Eastern North Atlantic. Earth Planet. Sci. Lett. 412, 245–260. https://doi.org/10.1016/j.epsl.2014.12.008 [2] Hartman, A., Goldstein, S., Pena Gonzalez, L. D., Duggan, B., Pahnke, K., Scher, H., Stichel, T., in prep. Seawater neodymium composition in the open ocean North Atlantic: water mass signatures and transport. [3] Duggan, B., Hartman, A.E., Stichel, T., Goldstein, S.L., Pahnke, K., Bizimis, M., Scher, H., in prep. Neodymium Concentrations and Isotopic Signature of the Deep Western Boundary Current Across Line W Table 1: Summary of the procedures applied in the involved laboratories of University of Hawaii at Mano (UH), Lamont-Doherty Earth Observatory (LDEO) and University of South Carolina (USC). Step UH LDEO USC Pre-concentration Spiked with 146 Nd prior to co-precipitation with FeOOH (~20mg Fe per sample) Spiked with 150 Nd prior to co-precipitation with FeOOH (~20mg Fe per sample) Nd and REE extraction with C18 cartridges, not spiked Chromatographic separation 2-step separation: 1. 1.4ml AG50W-X8 (200-400µm) as primary column. 2. 0.7ml AG50W-X8 (200-400µm) with Alpha-HIBA to purify Nd. 3. ~100µl TRU-Spec column for removal of any remaining Alpha-HIBA in samples. 2-step separation: 1. 100µl RE-Spec (100-150µm) as primary column. 2. 0.7ml AG50W-X8 (200-400µm) with Alpha-HIBA to purify Nd. 1-step separation: 2ml LN-Spec (50-100µm) for Nd purification. No primary column needed because major ions were removed during pre-concentration Mass spectrometry VG-Sector TIMS, NdO+, spiked for simultaneous isotope dilution and composition analysis VG-Sector54 TIMS, NdO+, spiked for simultaneous isotope dilution and composition analysis Thermo Neptune Plus MC-ICPMS Other Concentrations were determined on a previously separated 500ml aliquot by isotope dilution |
| Availability date: | |
| Metadata version: | 1 |
| Keydate: | 2024-06-27 20:14:13+00 |
| Editdate: | 2024-06-27 20:15:09+00 |