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OAS accession Detail for 0234331
| << previous | |revision: 9 |
| accessions_id: | 0234331 | archive |
|---|---|
| Title: | Benthic foraminiferal assemblages, stable isotopes, and short-lived radioisotope measurements from sediment cores collected during the multiple cruises in the northwestern margin of Cuba and Gulf of Mexico from 2010-06-13 to 2017-07-19 (NCEI Accession 0234331) |
| Abstract: | This dataset contains a compilation of seafloor surface benthic foraminifera assemblages, baseline stable carbon and oxygen isotope measurements from benthic foraminifera, and short-lived radioisotope measurements from sediment cores collected on multiple cruises and field sampling throughout the Gulf of Mexico and the northwestern margin of Cuba from 2010-06-13 to 2017-07-19. Stable isotope measurements were performed on Cibicidoides spp. The dataset includes the sediment core information such as location, date, and depth; benthic foraminiferal stable carbon and oxygen isotopes; and the total density and diversity calculations using Fisher’s Alpha and Shannon indices from the surface-most sub-sample from each core (typically 0-2 mm). For short-lived radioisotope measurements, samples were analyzed by gamma spectrometry with High-Purity Germanium (HPGe) gamma-ray detectors (Canberra Coaxial Planar configuration) for total 210Pb (46.5 keV), 214Pb (295 keV and 351 keV), and 214Bi (609 keV) activities. The mean activity of the 214Pb (295 keV), 214Pb (351 keV), and 214Bi (609 keV) was used as a proxy for 226Ra activity and therefore the supported 210Pb that is produced in situ. The reported excess 210Pb (210Pbxs) is the difference of the total 210Pb and the supported 210Pb. |
| Date received: | 20210520 |
| Start date: | 20100613 |
| End date: | 20170719 |
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| West boundary: | -97.566 |
| East boundary: | -82.339283 |
| North boundary: | 29.701667 |
| South boundary: | 18.631433 |
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| Submitter: | Sigdel, Bipana |
| Submitting institution: | GRIIDC |
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| Supplementary information: | 1. GRIIDC dataset R6.x805.000:0006 contains Gulf-wide seafloor surface benthic foraminifera stable isotopes data and the parameters included are: Site/station name, latitude and longitude (decimal degrees), collection date (mm/dd/yyyy), water depth (m), core name or ID, top depth of interval within the core (mm), core interval, benthic foraminiferal stable carbon delta-13C (per mil), stable oxygen delta-18O (per mil), delta-C13 standard deviation (per mil), delta-O18 standard deviation (per mil). 2. GRIIDC dataset R6.x805.000:0007 contains short-lived radioisotope (excess Pb210) measurements from sediment cores and the parameters included are: Station ID, latitude and longitude (decimal degrees), Excess Pb210 (disintegrations per minute, dpm), date of core collection (mm/dd/yyyy). 3. GRIIDC dataset R6.x805.000:0056 contains benthic foraminiferal assemblages from sediment cores and the parameters included are: Station ID, latitude and longitude (decimal degrees), Date of core collection (mm/dd/yyyy), Fisher's Alpha Index (unitless), Shannon diversity index (unitless), density (individuals/cm^3), species name, mean sample depth in core (mm), number of species per sample, ID'ed mass (g), coarse fraction mass (g), 2 mm sample volume (cm^3), total individuals in sample (#), total sieved mass (>500um, g). Total Assemblages are stained and unstained individuals and stained Assemblages were stained with Rose bengal. |
| Availability date: | |
| Metadata version: | 9 |
| Keydate: | 2021-05-26 15:30:25+00 |
| Editdate: | 2025-01-26 16:42:41+00 |