Chronology of a Holocene Core From the Pearl River Delta in Southern China

	Chronology of a Holocene Core From the Pearl River Delta in Southern China
	Xu, XiaoLin; Li, HongWei; Tang, LinJie; Lai, ZhongPing; Xu, GuanJun; Zhang, XianHe; Wang, YiXuan
刊名	FRONTIERS IN EARTH SCIENCE
	2020-07-03
卷号	8
英文摘要	Establishing a reliable chronological framework for sediments is crucial to the reconstruction of evolution process of estuarine delta, and the study of regional paleoenvironmental history, e.g., sea level fluctuations due to global climatic changes. High resolution chronology is still very limited for Holocene sediments in the Pearl River delta (PRD) in southern China. This study tries to construct a detailed chronology for core DA of 37.7 m in depth by using luminescence (seven samples) and radiocarbon (fourteen samples) dating techniques. Our results indicate that both luminescence and radiocarbon dating methods are suitable for the Holocene sediments in the PRD and that sediments of core DA were deposited during 7.3-0.18 ka. The(14)C age is generally older than the OSL age for the sediment at the similar depths, and the age difference increased from 0.45 ka at the depth of 21 m to 0.98 ka at the depth of 35 m. The reason that(14)C ages are relatively older might be caused by the carbon-reservoir effect which requires further study. The sedimentation rate increased from 3.74 m/ka during 7.3-2 ka to 7.92 m/ka in the last 2 ka. The appearances of rusty stains in upper unit of the core revealed that the water level was gradually falling. After the formation of underwater sand body at about 2 ka, the sediment was subject to continuous shifting between submergence and exposure.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/33997]
专题	青海盐湖研究所_管理部门中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Xu, XiaoLin,Li, HongWei,Tang, LinJie,et al. Chronology of a Holocene Core From the Pearl River Delta in Southern China[J]. FRONTIERS IN EARTH SCIENCE,2020,8.
APA	Xu, XiaoLin.,Li, HongWei.,Tang, LinJie.,Lai, ZhongPing.,Xu, GuanJun.,...&Wang, YiXuan.(2020).Chronology of a Holocene Core From the Pearl River Delta in Southern China.FRONTIERS IN EARTH SCIENCE,8.
MLA	Xu, XiaoLin,et al."Chronology of a Holocene Core From the Pearl River Delta in Southern China".FRONTIERS IN EARTH SCIENCE 8(2020).