Radiocarbon and OSL dating on cores from the Chaoshan delta in the coastal South China Sea
Radiocarbon and OSL dating on cores from the Chaoshan delta in the coastal South China Sea
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南海沿海潮汕三角洲岩心的放射性碳和光释光测年
DOI：
10.3389/fmars.2022.1030841
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发表时间：
2022-11
影响因子：
3.7
通讯作者：
Zhongping Lai
中科院分区：
文献类型：
--
作者：
Jiemei Zhong;Ken Ling;Meifei Yang;Qinjing Shen;Mahmoud Abbas;Zhongping Lai
准确的年代学在重建三角洲演化过程中起着至关重要的作用。放射性碳（14 C）和光释光（OSL）测年法被广泛用于建立晚第四纪沉积物的地层年代学。潮汕平原位于中国南部沿海，濒临南中国海。该地区第四纪沉积物的厚度可达140米，被认为是研究三角洲对气候和海平面变化的响应的宝贵档案。然而，可靠的年代数据仍然非常有限。本文对潮汕平原中部榕江平原ZK 001（90.85m）和ZK 002（100 m）两个岩心进行了18次加速器质谱（AMS）~（14）C和13次石英光释光年龄测定。本研究的目的是利用光释光和14 C测年方法为潮汕平原提供可靠的年代学资料，并探讨植物遗骸14 C测年的上限。结果表明，ZK 001和ZK 002孔的光释光年龄分别为56 ~ 1.7ka和177 ~ 15 ka，ZK 002孔的~（14）C年龄为8.8 ~ 41 calkaBP，表明它们的~（14）C年龄均小于ca。30 m深度的植物化石年龄小于OSL年龄，植物化石的上限约为35 cal ka BP。光释光年龄在不确定性范围内与地层层序一致。ZK 002孔最老的光释光年龄为177 ± 20 ka，深度为93 m，为最小年龄。这表明，榕江平原第四纪沉积至少可追溯到海平面低水位时期的海洋同位素阶段（MIS 6），在此期间，平原主要受河流作用的影响。潮汕平原14 C年龄与OSL年龄的对比表明，35 cal ka BP以上的14 C年龄需要重新评价。然而，光释光测年方法被证明是可靠的，以建立一个全面的年代框架晚第四纪沉积物在该地区。
Accurate chronology plays a crucial role in reconstructing delta evolution. Radiocarbon (14C) and optically stimulated luminescence (OSL) dating are widely used to establish a stratigraphic chronology of the late Quaternary sediments. The Chaoshan plain is located on the southern coast of China and borders the South China Sea. The thickness of Quaternary sediments in this area extends to a depth of 140 m and is considered a valuable archive for studying the evolution of the delta in response to climate and sea-level changes. However, reliable chronological data are still very limited. In this paper, eighteen accelerator mass spectrometry (AMS) 14C and thirteen quartz OSL ages were obtained from two cores from the Rongjiang plain, the middle part of the Chaoshan plain: ZK001 (90.85 m in depth) and ZK002 (100 m in depth). The present study aims to provide a reliable chronology of the Chaoshan plain based on OSL and 14C dating methods and examine the upper limit of the 14C dating on plant remains. Our results show that (1) OSL ages of cores ZK001 and ZK002 range from 56 to 1.7 ka and from 177 to 15 ka, respectively; (2) 14C ages of core ZK002 range from 8.8 to 41 cal ka BP, showing that all 14C ages below ca. 30 m depth are younger than OSL ages and that the upper limit of plant remains is around 35 cal ka BP. OSL ages are consistent with stratigraphic order within uncertainties. The oldest OSL age obtained from core ZK002 is 177 ± 20 ka at a depth of 93 m, and is considered a minimum age. This indicates that the Quaternary deposition in the Rongjiang plain can trace back to at least the marine isotope stage (MIS) 6 during sea-level lowstand, during which the plain is mainly influenced by the fluvial process. The comparison between 14C and OSL ages in the Chaoshan plain suggests that 14C ages older than 35 cal ka BP need to be re-evaluated. However, the OSL dating method proves reliable for establishing a comprehensive chronological framework for the late Quaternary sediments in this area.
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影响因子：
8.3
作者：
A. Agatova;R. Nepop;E. Zazovskaya;I. Ovchinnikov;P. Moska
通讯作者：
A. Agatova;R. Nepop;E. Zazovskaya;I. Ovchinnikov;P. Moska
影响因子：
2
作者：
J. Singarayer;R. Bailey
通讯作者：
J. Singarayer;R. Bailey
影响因子：
3
作者：
Zhongping Lai;H. Brückner
通讯作者：
Zhongping Lai;H. Brückner
中国黄土高原洛川黄土样品的石英光释光年龄低估研究
影响因子：
1.2
作者：
Z Lai;A Fan
通讯作者：
A Fan
DOI：
10.1007/978-94-007-6304-3_197
发表时间：
2015
期刊：
--
影响因子：
--
作者：
J. Wallinga;A. Cunningham
通讯作者：
J. Wallinga;A. Cunningham