Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux Implications
Episodic sedimentary processes with significant changes in sedimentation rate have occurred on the East Hainan Coast, the inner shelf of the South China Sea, since the Last Glacial Maximum. In particular, the early-Holocene (~11.5–8.7 ka) rapid sedimentation at a mean rate of ~4.90 m/ka is crucial t...
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2025-03-01
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| author | Mianjin Chen Xiao Sun Yang Li Yulong Xue Wenzhe Lyu Xuemu Wang Yan Li |
| author_facet | Mianjin Chen Xiao Sun Yang Li Yulong Xue Wenzhe Lyu Xuemu Wang Yan Li |
| author_sort | Mianjin Chen |
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| description | Episodic sedimentary processes with significant changes in sedimentation rate have occurred on the East Hainan Coast, the inner shelf of the South China Sea, since the Last Glacial Maximum. In particular, the early-Holocene (~11.5–8.7 ka) rapid sedimentation at a mean rate of ~4.90 m/ka is crucial to understand the processes of terrigenous input to the ocean, carbon cycling and climate control in coastal-neritic sedimentary evolution. However, the chronological framework and the detailed environmental evolution remain uncertain. In this study, core sediments collected from the East Hainan Coast (code: NH01) were used to revisit the characteristics of luminescence signals by comparing the dating results using the blue-light stimulated luminescence (blue-OSL) ages and previously published post-infrared blue-light stimulated luminescence (pIR-blue OSL) ages. The results showed that both the ages agreed with each other for the fine-grained quartz fraction. The refined chronology of the early-Holocene deposits on the East Hainan Coast with higher resolution suggested that the sedimentation rate was ~0.60 m/ka before 10.97 ka, while it increased abruptly to ~5.89 m/ka during the period of 10.97–9.27 ka. According to the refined OSL chronology and the high-resolution (~2.5 cm) titanium intensity using X-ray fluorescence (XRF) scanning, the rapid sedimentation during the early Holocene was likely controlled by increased terrigenous input. The variation in Ti flux reflected the differential response between two meltwater pulse (MWP) events under the combined effects of enhanced early-Holocene monsoons and localized freshwater input. These findings highlight the compound controls of global ice-volume change, monsoon dynamics and coastal geomorphic evolution on sedimentary processes. |
| format | Article |
| id | doaj-art-ca38673df3dc4ce4844e19f7cbd7de4e |
| institution | Kabale University |
| issn | 2077-1312 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-ca38673df3dc4ce4844e19f7cbd7de4e2025-08-20T03:43:12ZengMDPI AGJournal of Marine Science and Engineering2077-13122025-03-0113352710.3390/jmse13030527Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux ImplicationsMianjin Chen0Xiao Sun1Yang Li2Yulong Xue3Wenzhe Lyu4Xuemu Wang5Yan Li6Key Laboratory of Polar Geology and Marine Mineral Resources, China University of Geosciences (Beijing), Beijing 100083, ChinaKey Laboratory of Polar Geology and Marine Mineral Resources, China University of Geosciences (Beijing), Beijing 100083, ChinaKey Laboratory of Polar Geology and Marine Mineral Resources, China University of Geosciences (Beijing), Beijing 100083, ChinaHainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, ChinaSchool of Resources and Environmental Engineering, Ludong University, Yantai 264025, ChinaHainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, ChinaKey Laboratory of Polar Geology and Marine Mineral Resources, China University of Geosciences (Beijing), Beijing 100083, ChinaEpisodic sedimentary processes with significant changes in sedimentation rate have occurred on the East Hainan Coast, the inner shelf of the South China Sea, since the Last Glacial Maximum. In particular, the early-Holocene (~11.5–8.7 ka) rapid sedimentation at a mean rate of ~4.90 m/ka is crucial to understand the processes of terrigenous input to the ocean, carbon cycling and climate control in coastal-neritic sedimentary evolution. However, the chronological framework and the detailed environmental evolution remain uncertain. In this study, core sediments collected from the East Hainan Coast (code: NH01) were used to revisit the characteristics of luminescence signals by comparing the dating results using the blue-light stimulated luminescence (blue-OSL) ages and previously published post-infrared blue-light stimulated luminescence (pIR-blue OSL) ages. The results showed that both the ages agreed with each other for the fine-grained quartz fraction. The refined chronology of the early-Holocene deposits on the East Hainan Coast with higher resolution suggested that the sedimentation rate was ~0.60 m/ka before 10.97 ka, while it increased abruptly to ~5.89 m/ka during the period of 10.97–9.27 ka. According to the refined OSL chronology and the high-resolution (~2.5 cm) titanium intensity using X-ray fluorescence (XRF) scanning, the rapid sedimentation during the early Holocene was likely controlled by increased terrigenous input. The variation in Ti flux reflected the differential response between two meltwater pulse (MWP) events under the combined effects of enhanced early-Holocene monsoons and localized freshwater input. These findings highlight the compound controls of global ice-volume change, monsoon dynamics and coastal geomorphic evolution on sedimentary processes.https://www.mdpi.com/2077-1312/13/3/527optically stimulated luminescencetitanium intensity and fluxearly HoloceneXRF scanningEast Hainan Coast |
| spellingShingle | Mianjin Chen Xiao Sun Yang Li Yulong Xue Wenzhe Lyu Xuemu Wang Yan Li Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux Implications Journal of Marine Science and Engineering optically stimulated luminescence titanium intensity and flux early Holocene XRF scanning East Hainan Coast |
| title | Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux Implications |
| title_full | Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux Implications |
| title_fullStr | Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux Implications |
| title_full_unstemmed | Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux Implications |
| title_short | Early-Holocene Episodic Sedimentary Process on the East Hainan Coast: High-Resolution Chronological Refinement, Titanium Intensity and Flux Implications |
| title_sort | early holocene episodic sedimentary process on the east hainan coast high resolution chronological refinement titanium intensity and flux implications |
| topic | optically stimulated luminescence titanium intensity and flux early Holocene XRF scanning East Hainan Coast |
| url | https://www.mdpi.com/2077-1312/13/3/527 |
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