Geochemistry and provenance of core sediments from the southwestern Okinawa Trough
Understanding the sedimentary processes and provenance in the Okinawa Trough is critical for reconstructing regional tectonic evolution and sediment transport dynamics in this active back-arc basin. This study focuses on the geochemical characteristics of cored sediments from the southwestern Okinaw...
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| Format: | Article |
| Language: | English |
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Sciendo
2025-08-01
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| Series: | Oceanological and Hydrobiological Studies |
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| Online Access: | https://doi.org/10.26881/oahs-2025.1.12 |
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| author | Huang Kuo-Ming Lee Yung-Tan Chang I-An Huang Ren-Yi Lin Meng-Lung Hu Yen-Tsui |
| author_facet | Huang Kuo-Ming Lee Yung-Tan Chang I-An Huang Ren-Yi Lin Meng-Lung Hu Yen-Tsui |
| author_sort | Huang Kuo-Ming |
| collection | DOAJ |
| description | Understanding the sedimentary processes and provenance in the Okinawa Trough is critical for reconstructing regional tectonic evolution and sediment transport dynamics in this active back-arc basin. This study focuses on the geochemical characteristics of cored sediments from the southwestern Okinawa Trough to investigate their depositional processes and sediment source contributions. Geochemical analysis, including major and trace element concentrations as well as rare earth element (REE) patterns, reveals that REEs are predominantly associated with clay minerals, indicating their key role in sediment transport and diagenesis. La–Th–Sc ternary plots suggest a mixed provenance, with sediment contributions from northeastern Taiwan, the East China Sea continental shelf, and volcanic material from the Okinawa Trough. A three-end-member mixing model was applied to estimate the relative contributions of these sources. Results indicate that sediments from the Lan-Yang area in northeastern Taiwan account for approximately 54.63% of the total input, followed by 24.12% from the East China Sea shelf and 21.25% from local volcanic sources. The spatial distribution of source contributions further reflects the influence of fluvial input and ocean currents on sediment dispersal. These findings offer new insights into sedimentary processes and tectonic activity in the region. |
| format | Article |
| id | doaj-art-bf1dfe952d6943b98a1bdef80df9b2e3 |
| institution | Kabale University |
| issn | 1897-3191 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Oceanological and Hydrobiological Studies |
| spelling | doaj-art-bf1dfe952d6943b98a1bdef80df9b2e32025-08-25T06:12:15ZengSciendoOceanological and Hydrobiological Studies1897-31912025-08-0154213815910.26881/oahs-2025.1.12Geochemistry and provenance of core sediments from the southwestern Okinawa TroughHuang Kuo-Ming0Lee Yung-Tan1Chang I-An2Huang Ren-Yi3Lin Meng-Lung4Hu Yen-Tsui51Department of Applied Geomatics, Chien Hsin University, Taoyuan City, Taiwan, ROC2Department of Tourism and Travel Management, Taipei University of Marine Technology, New Taipei City, Taiwan, ROC3Institute of Oceanography, National Taiwan University, Taipei, Taiwan, ROC4Department of Leisure Business Management, Hungkuo Delin University of Technology, New Taipei City, Taiwan, ROC5Department of Tourism, Aletheia University, New Taipei City, Taiwan, ROC2Department of Tourism and Travel Management, Taipei University of Marine Technology, New Taipei City, Taiwan, ROCUnderstanding the sedimentary processes and provenance in the Okinawa Trough is critical for reconstructing regional tectonic evolution and sediment transport dynamics in this active back-arc basin. This study focuses on the geochemical characteristics of cored sediments from the southwestern Okinawa Trough to investigate their depositional processes and sediment source contributions. Geochemical analysis, including major and trace element concentrations as well as rare earth element (REE) patterns, reveals that REEs are predominantly associated with clay minerals, indicating their key role in sediment transport and diagenesis. La–Th–Sc ternary plots suggest a mixed provenance, with sediment contributions from northeastern Taiwan, the East China Sea continental shelf, and volcanic material from the Okinawa Trough. A three-end-member mixing model was applied to estimate the relative contributions of these sources. Results indicate that sediments from the Lan-Yang area in northeastern Taiwan account for approximately 54.63% of the total input, followed by 24.12% from the East China Sea shelf and 21.25% from local volcanic sources. The spatial distribution of source contributions further reflects the influence of fluvial input and ocean currents on sediment dispersal. These findings offer new insights into sedimentary processes and tectonic activity in the region.https://doi.org/10.26881/oahs-2025.1.12rare earth elementsclay mineral adsorptionback-arc basin sedimentationmixing model analysisterrigenous input |
| spellingShingle | Huang Kuo-Ming Lee Yung-Tan Chang I-An Huang Ren-Yi Lin Meng-Lung Hu Yen-Tsui Geochemistry and provenance of core sediments from the southwestern Okinawa Trough Oceanological and Hydrobiological Studies rare earth elements clay mineral adsorption back-arc basin sedimentation mixing model analysis terrigenous input |
| title | Geochemistry and provenance of core sediments from the southwestern Okinawa Trough |
| title_full | Geochemistry and provenance of core sediments from the southwestern Okinawa Trough |
| title_fullStr | Geochemistry and provenance of core sediments from the southwestern Okinawa Trough |
| title_full_unstemmed | Geochemistry and provenance of core sediments from the southwestern Okinawa Trough |
| title_short | Geochemistry and provenance of core sediments from the southwestern Okinawa Trough |
| title_sort | geochemistry and provenance of core sediments from the southwestern okinawa trough |
| topic | rare earth elements clay mineral adsorption back-arc basin sedimentation mixing model analysis terrigenous input |
| url | https://doi.org/10.26881/oahs-2025.1.12 |
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