Seo, Inah; Kim, Mun Gi; Yoo, Chan Min; Hyeong, Kiseong (2021): Geochemical composition of inorganic silicate fraction of surface sediment samples collected along a 131.5°W transect in the central Pacific [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.934692
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Abstract:
This dataset includes neodymium isotope ratios and La, Yb, Sc, and Th concentrations of inorganic silicate fractions of surface sediments from the central Pacific, with relevant sampling information. The aim of the study is to identify latitudinal changes in hemispheric dust provenance. 16 sediment cores were collected along a 131.5°W transect from the equator to 16°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 those obtained within the top 10 cm of the cores (usually within the top 3 cm) were used to extract the inorganic silicate fraction. The inorganic silicate fractions of bulk sediments were isolated 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.
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 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.807836
Seo, Inah; Kim, Mun Gi; Yoo, Chan Min; Hyeong, Kiseong (2021): Geochemically Defined Mean Position of the Intertropical Convergence Zone in the Central Pacific. Geophysical Research Letters, 48(19), e2021GL094432, https://doi.org/10.1029/2021GL094432
Taylor, Stuart Ross; McLennan, Scott M (1985): The Continental Crust: Its Composition and Evolution. Blackwell Scientific Publications, Oxford, 312 pp
Funding:
Coverage:
Median Latitude: 7.562043 * Median Longitude: -131.503069 * South-bound Latitude: 0.001420 * West-bound Longitude: -131.545980 * North-bound Latitude: 15.998100 * East-bound Longitude: -131.477130
Date/Time Start: 2003-07-11T19:34:00 * Date/Time End: 2005-08-08T09:25:00
Minimum DEPTH, water: 4085 m * Maximum DEPTH, water: 5076 m
Event(s):
KODOS03-03_MC03-03-N8 (MC03-03-N8) * Latitude: 8.005170 * Longitude: -131.498820 * Date/Time: 2003-07-23T00:44:00 * Elevation: -5046.0 m * Location: North Pacific Ocean * Campaign: KODOS03-03 * Basis: Onnuri * Method/Device: MultiCorer (MUC)
KODOS03-03_MC03-03-N12 (MC03-03-N12) * Latitude: 11.999780 * Longitude: -131.499330 * Date/Time: 2003-07-11T19:34:00 * Elevation: -5027.0 m * Location: North Pacific Ocean * Campaign: KODOS03-03 * Basis: Onnuri * Method/Device: MultiCorer (MUC)
KODOS03-03_MC03-03-N13 (MC03-03-N13) * Latitude: 13.000920 * Longitude: -131.497020 * Date/Time: 2003-07-12T16:25:00 * Elevation: -4962.0 m * Location: North Pacific Ocean * Campaign: KODOS03-03 * Basis: Onnuri * Method/Device: MultiCorer (MUC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Seo, Inah | |||
| 2 | Core | Core | Seo, Inah | name | ||
| 3 | LATITUDE | Latitude | Seo, Inah | Geocode | ||
| 4 | LONGITUDE | Longitude | Seo, Inah | Geocode | ||
| 5 | DEPTH, water | Depth water | m | Seo, Inah | Geocode | |
| 6 | Cruise/expedition | Expedition | Seo, Inah | |||
| 7 | DATE/TIME | Date/Time | Seo, Inah | Geocode – of collection | ||
| 8 | Depth comment | Depth comm | Seo, Inah | Sample depth (cm) | ||
| 9 | Neodymium-143/Neodymium-144 ratio | 143Nd/144Nd | Seo, Inah | Multi-collector thermal ionization mass spectrometer (TIMS) | ||
| 10 | Neodymium-143/Neodymium-144 ratio, standard deviation | 143Nd/144Nd std dev | ± | Seo, Inah | Multi-collector thermal ionization mass spectrometer (TIMS) | ±2σ |
| 11 | ε-Neodymium | ε-Nd | Seo, Inah | Inductively coupled plasma-quadrupole-mass spectrometry (ICP-Q-MS) | ||
| 12 | Lanthanum | La | mg/kg | Seo, Inah | Inductively coupled plasma-quadrupole-mass spectrometry (ICP-Q-MS) | |
| 13 | Ytterbium | Yb | mg/kg | Seo, Inah | Inductively coupled plasma-quadrupole-mass spectrometry (ICP-Q-MS) | |
| 14 | Scandium | Sc | mg/kg | Seo, Inah | Inductively coupled plasma-quadrupole-mass spectrometry (ICP-Q-MS) | |
| 15 | Thorium | Th | mg/kg | Seo, Inah | Inductively coupled plasma-quadrupole-mass spectrometry (ICP-Q-MS) | |
| 16 | Lanthanum/Ytterbium ratio | La/Yb | Seo, Inah | Calculated, PAAS-normalized | after Taylor & McLennan (1985) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
176 data points