(Table 1) Strontium isotopes and estimated ages for ichthyoliths of sediment core KODOS_02_01_02
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2005
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| _version_ | 1867168158283988992 |
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| author | Hyeong, Kiseong Park, Sung-Hyun Yoo, Chan Min Kim, Ki-Hyune |
| author_facet | Hyeong, Kiseong Park, Sung-Hyun Yoo, Chan Min Kim, Ki-Hyune |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Eolian components of a 328-cm-long piston core collected from the northeast equatorial Pacific at 16°12'N and 125°59'W were investigated for mineral and geochemical compositions in order to constrain the sources of dust and determine the latitudinal position of the Intertropical Convergence Zone (ITCZ) recorded in the core. The eolian components below 250 cm are characterized by smectite- and phillipsite-rich mineral composition, depleted rare earth elements (REEs), and high Eu/Sm ratios, indicative of volcanic-rich composition. These characteristics are found in equatorial and south Pacific surface sediments, of which eolian particles are supplied from Central and South America. In contrast, eolian components above 250 cm are characterized by quartz- and illite-rich mineralogy, and more shale-like REE and trace element compositions, which are common in surface sediments of the central Pacific north of the ITCZ, where eolian particles are sourced from the Asia and North America. The observed changes are attributed to the shifting of its eolian sources from the Central and South America to the China and North America across the hemispheric dust barrier of the ITCZ. This result suggests that smectite-illite transition, a phenomenon that smectite amount increases over illite at a depth, can be used as a tracking tool for the paleolocation of the ITCZ in the northeast and central Pacific. Backtrack path construction of Pacific plate indicates paleolocation of the ITCZ north of 12°N (±2°) prior to late Miocene. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_837687 |
| institution | PANGAEA |
| language | en |
| publishDate | 2005 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Strontium isotopes and estimated ages for ichthyoliths of sediment core KODOS_02_01_02 Hyeong, Kiseong Park, Sung-Hyun Yoo, Chan Min Kim, Ki-Hyune Age, dated; Age, dated, error to older; Age, dated, error to younger; Age, strontium isotope, LOWESS fit McArthur et al. (2001); Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Equatorial Pacific; KODOS_02_01_02; PC; Piston corer; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error Eolian components of a 328-cm-long piston core collected from the northeast equatorial Pacific at 16°12'N and 125°59'W were investigated for mineral and geochemical compositions in order to constrain the sources of dust and determine the latitudinal position of the Intertropical Convergence Zone (ITCZ) recorded in the core. The eolian components below 250 cm are characterized by smectite- and phillipsite-rich mineral composition, depleted rare earth elements (REEs), and high Eu/Sm ratios, indicative of volcanic-rich composition. These characteristics are found in equatorial and south Pacific surface sediments, of which eolian particles are supplied from Central and South America. In contrast, eolian components above 250 cm are characterized by quartz- and illite-rich mineralogy, and more shale-like REE and trace element compositions, which are common in surface sediments of the central Pacific north of the ITCZ, where eolian particles are sourced from the Asia and North America. The observed changes are attributed to the shifting of its eolian sources from the Central and South America to the China and North America across the hemispheric dust barrier of the ITCZ. This result suggests that smectite-illite transition, a phenomenon that smectite amount increases over illite at a depth, can be used as a tracking tool for the paleolocation of the ITCZ in the northeast and central Pacific. Backtrack path construction of Pacific plate indicates paleolocation of the ITCZ north of 12°N (±2°) prior to late Miocene. |
| title | (Table 1) Strontium isotopes and estimated ages for ichthyoliths of sediment core KODOS_02_01_02 |
| topic | Age, dated; Age, dated, error to older; Age, dated, error to younger; Age, strontium isotope, LOWESS fit McArthur et al. (2001); Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Equatorial Pacific; KODOS_02_01_02; PC; Piston corer; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error |
| url | https://doi.org/10.1594/PANGAEA.837687 |