Geochemistry and age data of the down-core sediments collected along 131.5°W transect at the central equatorial Pacific
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2024
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| _version_ | 1867167682243067904 |
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| author | Kim, Mun Gi Seo, Inah Hyeong, Kiseong |
| author_facet | Kim, Mun Gi Seo, Inah Hyeong, Kiseong |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_964173 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemistry and age data of the down-core sediments collected along 131.5°W transect at the central equatorial Pacific Kim, Mun Gi Seo, Inah Hyeong, Kiseong Eolian dust; Geochemistry; Intertropical Convergence Zone; Neodymium isotope 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. |
| title | Geochemistry and age data of the down-core sediments collected along 131.5°W transect at the central equatorial Pacific |
| topic | Eolian dust; Geochemistry; Intertropical Convergence Zone; Neodymium isotope |
| url | https://doi.org/10.1594/PANGAEA.964173 |