1.广东省地质调查研究院,广东 广州 510062
2.汕头大学海洋灾害预警与防护广东省重点实验室,广东 汕头 515063
3.南方海洋科学与工程广东省实验室(珠海),广东 珠海 519000
黄红威(1969年生),男;研究方向:海岸带综合地质调查;E-mail:13501520638@163.com
李冠华(1985年生),男;研究方向:第四纪年代学与古环境演化;E-mail:guanhli@stu.edu.cn
收稿:2025-10-27,
修回:2026-01-26,
录用:2026-03-11,
网络首发:2026-05-20,
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黄红威, 郭峰, 李雨龙, 等. 广东海陵湾全新世沉积特征及其古环境响应[J/OL]. 中山大学学报(自然科学版)(中英文), 2026,1-12.
Huang Hongwei, Guo Feng, Li Yulong, et al. The Holocene sedimentary and paleoenvironmental evolution in Hailing Bay, Guangdong[J/OL]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2026, 1-12.
黄红威, 郭峰, 李雨龙, 等. 广东海陵湾全新世沉积特征及其古环境响应[J/OL]. 中山大学学报(自然科学版)(中英文), 2026,1-12. DOI: 10.11714/acta.snus.ZR20250232.
Huang Hongwei, Guo Feng, Li Yulong, et al. The Holocene sedimentary and paleoenvironmental evolution in Hailing Bay, Guangdong[J/OL]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2026, 1-12. DOI: 10.11714/acta.snus.ZR20250232.
在全球变化背景下,海岸带环境演变对区域经济与城市发展具有重要影响。位于南海北部的海陵湾海域保存了连续的全新世沉积,是研究古环境演化的理想载体。基于海陵湾HLZZ08钻孔,利用碳十四(
14
C)与光释光测年建立年代框架,通过粒度参数构建沉积序列,并结合端元分析、粒径-标准偏差及主成分分析,探讨粒度变化对区域古环境的响应。研究发现,HLZZ08孔沉积粒度分布呈单峰或双峰,细颗粒主要指示夏季风与河流径流强度,粗颗粒含量则反映低海平面时期较强的河流及海流动力环境。粒度变化反映全新世早期夏季风逐步增强和中期逐步减弱趋势,沉积动力主要受控于季风和海平面变化。过去2 000 a,粒度记录显示沉积演化由季风主导逐渐转向受海平面变化控制,细颗粒仍主要响应夏季风,粗颗粒则反映海平面波动,过去千年的粒度变化与区域人类活动指标呈一定同步性。本研究提供了新的海陵湾海域沉积全新世古环境-人类耦合记录,丰富了南海北部全新世古环境的研究内容。
Coastal environmental change resulting from global climate variability has significant implications for regional development. Hailing Bay, located in the northe
rn South China Sea, preserves a continuous Holocene sedimentary archive, making it ideal for reconstructing paleoenvironmental evolution. This study examined the offshore HLZZ08 core and established a chronological framework using radiocarbon (
14
C) and optically stimulated luminescence dating. Grain‑size parameters were used to build sedimentary sequences. End‑member modeling, grain‑size standard deviation analysis, and principal component analysis were applied to explore the relationship between grain‑size variability and regional environmental change. The sediment grain size distributions in core HLZZ08 are primarily unimodal to bimodal, indicating multi‑stage shifts in depositional dynamics. The fine‑grained components reflect variations in summer monsoon intensity and fluvial discharge, whereas the coarse‑grained fractions correspond to stronger fluvial and marine hydrodynamic conditions during lower sea‑level periods. Grain‑size variations reveal a strengthening summer monsoon in the early Holocene, followed by a progressive weakening in the mid‑Holocene, with depositional dynamics primarily controlled by monsoon intensity and sea‑level fluctuations. Over the past 2000 years, the sedimentary evolution shifted from being monsoon‑dominated to sea‑level‑controlled. During this period, fine particles remained sensitive to summer monsoon variability, while coarse particles primarily tracked sea‑level changes. Concurrently, grain‑size fluctuations over the last millennium have also shown a degree of synchrony with regional indicators of human activity. These findings provide new insights into Holocene environment-human interactions in Hailing Bay and advance paleoenvironmental research in the northern South China Sea.
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