De Entrambasaguas, Julia; Westerhold, Thomas; Jones, Heather; Alegret, Laia: Stable isotopes of benthic foraminifera and calcareous nannofossils from ODP Site 171-1053 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.965594 (dataset in review)
Abstract:
ODP 1053: bulk δ13C and δ18O Stable isotope dataset:
This dataset contains the 13C and 18O isotope data from 70 bulk sediment samples (at 1 cm sampling resolution) from ODP Site 1053 core 8, Section 5. Samples span 74.54 to 75.20 m in composite depth.
Data was collected in 2021 and span a 1 M.y. long late Eocene Interval, Priabonian in age, that corresponds to the CNE19 nannofossil biozone of the Priabonian (ca. 36 Ma; Agnini et al., 2014; Raffi et al., 2016).
Bulk sediment samples were collected from ODP Site 1053, in the Blake Nose, NW Atlantic Ocean. This dataset has a regional resolution and was collected to further investigate the regional paleoceanography of the Blake Nose during the Late Eocene.
The analyses were conducted at MARUM Isotope Laboratory (Bremen University) using a Finnigan MAT 251 gas isotope ratio mass spectrometer with Kiel I automated carbonate preparation device. Data are registered relative to the Vienna Pee Dee Belemnite international standard, determined by adjustment to a calibrated in-house standard (Solnhofen limestone). The deviation of house standard over the measurement period was 0.04‰ for δ13C, and 0.05‰ for δ18O.
ODP 1053: Benthic foraminiferal dataset:
This dataset contains the quantitative data relative to the benthic foraminifera assemblages from a subset of 26 samples from ODP Site 1053 core 8, Section 5. Samples span 74.54 to 75.20 m in composite depth, with a sample resolution that ranges from 1 to 10 cm. Data was collected From October 2021 to February 2022 and span a 1 M.y. long late Eocene Interval, Priabonian in age, that corresponds to the CNE19 nannofossil biozone of the Priabonian (ca. 36 Ma; Agnini et al., 2014; Raffi et al., 2016).
The samples from which the benthic foraminiferal assemblages were obtained were collected from ODP Site 1053, in the Blake Nose, NW Atlantic Ocean. This dataset has a regional resolution and was collected following previous results on bulk carbon and Oxygen stable isotopes, to further investigate the regional paleoceanography in the Blake Nose during the Late Eocene.
Samples were oven-dried (<50°C for 24 hr), weighed, and soaked in (NaPO3)6 for 3 hr. Disaggregated samples were sieved under running water with a 63 μm-mesh size sieve. The >63 μm size fraction was collected, oven-dried (<50°C for 24 hr), and weighed again. For each sample, around 300 specimens were picked as representation for the assemblage.
ODP 1053: Calcareous nannofossil dataset:
This dataset contains the semiquantitative data relative to the calcareous nannofossil assemblages from a subset of 26 samples from ODP Site 1053 core 8, Section 5. Samples span 74.54 to 75.20 m in composite depth, with a sample resolution that ranges from 1 to 10 cm. Data was collected From January to April 2023 and span a 1 M.y. long late Eocene Interval, Priabonian in age, that corresponds to the CNE19 nannofossil zone of the Priabonian (ca. 36 Ma; Agnini et al., 2014; Raffi et al., 2016).
The samples from which the calcareous nannofossil assemblages were obtained were collected from ODP Site 1053, in the Blake Nose, NW Atlantic Ocean. This dataset has a regional resolution. Following previous results on bulk carbon and Oxygen stable isotopes, data was collected to further investigate the Blake Nose's regional paleoceanography during the Late Eocene.
Nannofossil smear slides were prepared and examined using an Olympus BX51 polarizing microscope at the MARUM – Center for Marine Environmental Sciences (University of Bremen). Biostratigraphic analyses were conducted at low (600x) magnification along two long transects of each slide to ensure that rare, biostratigraphically significant taxa were not overlooked. For qualitative assemblage analyses, ten fields of view (FOV) from a representative area of each slide were examined at higher (1000x) magnification. The individual abundance of each species within a sample was then estimated as follows:
C: At least one specimen present in every FOV
Fr: One specimen present in 6 to 9 of the FOV
F: One specimen present in 2 to 5 of the FOV
R: Specimen only present in one of the FOV
VR: 5 or less specimens observed within the whole sample (used for the taxa that were only observed while conducting biostratigraphic analyses).
Project(s):
Ocean Drilling Program (ODP)
Funding:
German Research Foundation (DFG), grant/award no. 320221997: New high-resolution compilation of benthic stable isotope data spanning 34 to 75 Ma - for both Atlantic and Pacific Ocean
German Research Foundation (DFG), grant/award no. 390741603: EXC 2077: The Ocean Floor – Earth's Uncharted Interface
Ministry of Economy, Industry and Competitiveness (MINECO), grant/award no. PID2019-105537RB-I00: MCIN/AEI/ 10.13039/501100011033 and ERDF A way of making Europe
Coverage:
Latitude: 29.992292 * Longitude: -76.523543
Date/Time Start: 1997-02-06T20:30:00 * Date/Time End: 1997-02-07T18:20:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
4 datasets
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Datasets listed in this bundled publication
- De Entrambasaguas, J; Westerhold, T; Jones, H et al. (in review): Calcareous nannofossil biostratigraphic terms of ODP Site 171-1053. https://doi.pangaea.de/10.1594/PANGAEA.965566
- De Entrambasaguas, J; Westerhold, T; Jones, H et al. (in review): Benthic foraminiferal numbers of ODP Hole 171-1053B. https://doi.pangaea.de/10.1594/PANGAEA.965618
- De Entrambasaguas, J; Westerhold, T; Jones, H et al. (in review): Calcareous nannofossil numbers of ODP Hole 171-1053B. https://doi.pangaea.de/10.1594/PANGAEA.965574
- De Entrambasaguas, J; Westerhold, T; Jones, H et al. (in review): Bulk δ13C and δ18O stable isotope data of ODP Site 171-1053. https://doi.pangaea.de/10.1594/PANGAEA.965366