Kim, Mun Gi; Seo, Inah; Hyeong, Kiseong (2024): Geochemistry and age data of the down-core sediments collected along 131.5°W transect at the central equatorial Pacific [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.964173
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Abstract:
This dataset includes geochemical composition of inorganic silicate fractions separated from down-core sediments from the central Pacific, with relevant sampling information and radiocarbon and stable oxygen isotope data underlying the age model. The aim of the study is to track position of the Intertropical Convergence Zone during the Last Glacial Maximum and Heinrich Stadial 1 based on the latitudinal changes in hemispheric dust provenance. 7 sediment cores were collected along a 131.5°W transect from the equator to 6°N at ~1º intervals using a multiple corer and a piston corer on the R/V Onnuri during KODOS03-03 cruise (2003.07.03-2003.08.01; Chief Scientist: Woong-Seo Kim) and KODOS05-01 cruise (2005.07.17-2005.08.15; Chief Scientist: Woong-Seo Kim). Subsamples were taken at 1 cm intervals from the split cores, and planktic foraminifera was picked from one to five subsamples per each core for radiocarbon dating. Radiocarbon ages were obtained by AMS, and were calibrated to calender years before present. For one sediment core (MC5111), oxygen isotope ratios (δ18O) of planktic foraminifer, P. obliquiloculata (355–425 μm, ~10 specimens) were measured to supplement radiocarbon ages using IRMS. The inorganic silicate fractions were isolated from bulk sediments by sequential dissolution with 25% acetic acid, hot sodium citrate-sodium dithionite solution buffered with sodium bicarbonate, and hot sodium hydroxide solution. The elemental composition of the inorganic silicate fraction was determined using a quadrupole ICP-MS following conventional acid digestion. 143Nd/144Nd ratios were determined via multi-collector thermal ionization mass spectrometer using standard cation exchange techniques.
Supplement to:
Kim, Mun Gi; Seo, Inah; Hyeong, Kiseong (submitted): Response of the Central Pacific Intertropical Convergence Zone to Northern Hemisphere Cooling during the Last Glacial Maximum and Heinrich Stadial 1. Geophysical Research Letters
Related to:
Hovan, Steven A (1995): Late Cenozoic atmospheric circulation intensity and climatic history recorded by eolian deposition in the eastern Equatorial Pacific Ocean, Leg 138. In: Pisias, NG; Mayer, LA; Janecek, TR; Palmer-Julson, A; van Andel, TH (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 138, 615-625, https://doi.org/10.2973/odp.proc.sr.138.132.1995
Hovan, Steven A (1995): Late Cenozoic eolian dust accumulation in the eastern equatorial Pacific Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.807836
Taylor, Stuart Ross; McLennan, Scott M (1985): The Continental Crust: Its Composition and Evolution. Blackwell Scientific Publications, Oxford, 312 pp
Funding:
Coverage:
Median Latitude: 4.269212 * Median Longitude: -131.495598 * South-bound Latitude: 0.001420 * West-bound Longitude: -131.545980 * North-bound Latitude: 6.006580 * East-bound Longitude: -131.477130
Date/Time Start: 2005-08-03T19:27:00 * Date/Time End: 2005-08-08T09:25:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
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3 datasets
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Datasets listed in this bundled publication
- Kim, MG; Seo, I; Hyeong, K (2024): Radiocarbon age data of sediment cores collected along a 131.5°W transect. https://doi.org/10.1594/PANGAEA.964188
- Kim, MG; Seo, I; Hyeong, K (2024): Geochemical composition of inorganic silicate fractions separated from sediment cores collected along a 131.5°W transect. https://doi.org/10.1594/PANGAEA.964189
- Kim, MG; Seo, I; Hyeong, K (2024): δ18O of Pulleniatina obliquiloculata from sediment core MC5111. https://doi.org/10.1594/PANGAEA.964190