Holocene sedimentary evolution of a subaqueous delta off a typical tropical river, Hainan Island, South China

Chen, Yuanyuan; Deng, Bing; Chen, Yufeng; Wang, Daoru; Zhang, Jing

doi:10.1016/j.margeo.2021.106664

Cited by 5 publications

(1 citation statement)

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“…During the Last Glacial Maximum, the sea level was probably ~130 m below the modern sea level [48][49][50], and a large area of the SCS continental shelf (incl. the BBG seabed) was likely subaerially exposed to weathering and erosion [11].…”

Section: Sea Level Changementioning

confidence: 99%

The Clay Mineralogy and Geochemistry of Sediments in the Beibu Gulf, South China Sea: A Record of the Holocene Sedimentary Environmental Change

Guan

Chen

Sun

et al. 2023

JMSE

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In this study, we analyzed the clay mineralogy and geochemistry of surface and drill core samples from the northeastern Beibu Gulf in order to unravel the sediment provenance of, and factors controlling, the sedimentary environment. The main clay mineral assemblage in the surface sediment samples included kaolinite (27–72%), smectite (4–51%), illite (7–20%), and chlorite (8–17%). The study area comprises three major clay distribution zones (from the northeastern coastal area to central Beibu Gulf basin), i.e., the kaolinite-dominated, kaolinite–smectite, and smectite-dominated zones. The zoning of the clay mineralogy and major and trace elements indicated the mixing of coarse terrigenous sediments with distal fine sediments. Early Holocene sea level rise was documented in core B15-1, which had three sedimentary units (divided into Units 1–3 from top to bottom), as revealed by the changes in the dominant clay minerals and geochemical/oxide ratios (SiO2/Al2O3, Rb/Sr, Sr/Ba, and Ti/Ca) in Unit 2. Unit 1 and Unit 3 were likely deposited in the continental and marine environments, respectively. The low sedimentation rate and hydrodynamic disturbance may have influenced the deposition process more than climatic fluctuations.

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