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  • 2020-2024  (12)
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  • 11
    Publication Date: 2024-04-26
    Description: The Ocean Drilling Program (ODP) Site 752 (ODP Expedition 121), located on Broken Ridge in the Indian Ocean, provides a high-quality, continuous sediment archive. Bulk chemical records of Site 752 were measured using X-ray fluorescence core scanning using an Itrax XRF scanner using a Molybdenum X-ray source at the Kochi Core Center, Kochi, Japan. The elemental composition of the sediment was reported as counts. We use XRF data to reconstruct an eccentricity-tuned age-depth model. Grain size measurements of 123 samples throughout the last 23 million years from the same core were conducted in the Particle-Size Laboratory at MARUM, University of Bremen with a Beckman Coulter Laser Diffraction Particle Size Analyzer LS 13320. The particle-size distribution result of a sample consists of 116 size classes (from 0.04 to 2000 μm). The high-resolution XRF data set (N = 3118) and the result of grain size analysis can be used to construct paleoceanographic changes in the Indian Ocean since 23 Ma. These results provide new insights into the role of astronomical forcing in shaping the Indian Ocean's dynamics and highlight the potential of ODP Site 752 as a valuable resource for future paleoceanographic research.
    Keywords: Broken Ridge; grain size analysis; Neogene; Ocean Drilling Program; ODP; ODP Site 752; XRF
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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  • 12
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    PANGAEA
    In:  Supplement to: Auer, Gerald; De Vleeschouwer, David; Christensen, Beth A (2020): Toward a Robust Plio‐Pleistocene Chronostratigraphy for ODP Site 762. Geophysical Research Letters, 47(3), e2019GL085198, https://doi.org/10.1029/2019GL085198
    Publication Date: 2024-04-26
    Description: The advent of rapid-acquired proxy records provides paleoceanographers and paleoclimatologists with a wealth of high-resolution data. These data are a boon for the community, as they enable millennial- or even sub-millennial scale interpretation of past climate and ocean change. Multi-site and multi-proxy research permits regional and global correlations with high precision. Yet, accuracy is sometimes lost sight of, resulting in inaccurate age constraints. To highlight the importance of chronostratigraphic accuracy we examine a recent publication by J.-B. Stuut and co-authors (2019) that presents a chronostratigraphic framework potentially at odds with regional chronostratigraphy by up to 300 kyr in the Pliocene and 600 kyr in the Pleistocene. Using all available chronostratigraphic data, we provide an alternate integrated stratigraphic framework that results in a higher degree of uniformity among regional climate archives and confirms the timing of a major climatic transition in Australia between ~3.55 to 3.3 Ma.
    Keywords: 122-762B; AGE; age models; biostratigraphy; Cyclostratigraphy; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Integrated Ocean Drilling Program / International Ocean Discovery Program; Integrated stratigraphy; International Ocean Discovery Program (IODP); inter-site correlation; IODP; Joides Resolution; Leg122; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: text/tab-separated-values, 0 data points
    Location Call Number Limitation Availability
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