Late Holocene coastal dynamics south of the Chanthaburi estuary, eastern Gulf of Thailand

IF 1.7 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary Research Pub Date : 2023-07-27 DOI:10.1017/qua.2023.34

Armelle Ballian, S. Chawchai, Johannes M. Miocic, Warinyupa Charoenchatree, R. Bissen, F. Preusser

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引用次数: 1

Abstract

Beach ridges are depositional features that allow reconstruction of past sea-level variations, sediment dynamics, and storm activity. However, there are still very few systematic studies focusing on beach ridges available from the Gulf of Thailand. Along the east coast, satellite images provide evidence of beach ridges in the Chanthaburi Province, extending as far as 6 km inland, oriented parallel to the current coastline. These can be divided into a set of landward ridges (5.3–6.0 km inland) and seaward ridges (0.4–1.8 km inland) that are separated by an arm of the Chanthaburi estuary. Optically stimulated luminescence dating of 26 sand samples from 12 pits of ridge profiles suggests that the landward set of beach ridges formed ca. 3500 yr ago, while the seaward set of ridges formed between ca. 2100–1200 years ago, which also includes the modern active beach. It appears that the landward set of beach ridges developed during a period of relatively stable sea level followed by a rapid regression presently occupied by the arm of the Chanthaburi estuary. The seaward set of beach ridges apparently reflects a millennium of slowly retreating coastline until the modern beach ridge formed.

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泰国湾东部Chanthaburi河口以南晚全新世海岸动力学

海滩山脊是可以重建过去海平面变化、沉积物动力学和风暴活动的沉积特征。然而，对泰国湾海滩山脊的系统研究仍然很少。沿东海岸，卫星图像提供了昌塔武里省海滩山脊的证据，这些山脊延伸至内陆6公里，与当前海岸线平行。这些山脊可分为一组陆地山脊（内陆5.3-6.0公里）和向海山脊（内陆0.4-1.8公里），它们被昌塔武里河口的一个海湾隔开。来自12个山脊剖面坑的26个沙子样本的光学激发发光测年表明，向陆地的一组海滩山脊形成于约3500年前，而向海的一组山脊形成于2100–1200年前，其中也包括现代活动海滩。似乎是在海平面相对稳定的时期形成了向陆地的一组海滩山脊，随后是目前由昌塔武里河口臂占据的快速回归。向海的海滩山脊显然反映了千年来海岸线的缓慢后退，直到现代海滩山脊形成。

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来源期刊

Quaternary Research 地学-地球科学综合

CiteScore

4.70

自引率

8.70%

发文量

审稿时长

3 months

期刊介绍： Quaternary Research is an international journal devoted to the advancement of the interdisciplinary understanding of the Quaternary Period. We aim to publish articles of broad interest with relevance to more than one discipline, and that constitute a significant new contribution to Quaternary science. The journal’s scope is global, building on its nearly 50-year history in advancing the understanding of earth and human history through interdisciplinary study of the last 2.6 million years.