沉积学报2017，Vol.35Issue(6)：1133-1143,11.DOI:10.14027/j.cnki.cjxb.2017.06.005
海南岛东南部海岸砂丘风暴冲越沉积记录
A Coastal Dune Overwash Record of Typhoon Storm Events from South-eastern Hainan Island
摘要
Abstract
In the present study, coastal dune deposits are analyzed to derive the information on historical storm events. Paleotempestology investigations were carried out for the southeastern part of Hainan Island. The storm deposits identi-fied are interbedded within the aeolian coastal dune profiles on the Jianling coast. They are characterized by coarse-grained overwash deposits during the extreme storm events, as revealed on the basis of detailed stratigraphic division, grain size and magnetic susceptibility analyses. The age of the storms events was determined using the 14 C and OSL dating methods, in combination with historical documents. When a storm surge hits the coast, the coastal dune may be overtopped or breached, and a low-lying dune associated with a large, flat terrain at the backshore is suitable for trap-ping the storm sediment to form a thick-bedded, sandy washover deposit. The Stockdon empirical equation was used to calculate the overwash height, indicating that the storm record at the Jianling site represents the product formed by several storms, with their return periods being 100 to 200 years. The result obtained implies that the coastal dune here contain important information on the intensity and frequency of occurrence of the South China Sea typhoons.关键词
古风暴学/冲越沉积/风暴强度/海岸沙丘/海南岛Key words
paleotempestologic analysis/storm deposits/coastal dunes/storm intensity/Hainan Island分类
天文与地球科学引用本文复制引用
杨保明,高抒,周亮,赵秧秧,屠佳雨,王成龙..海南岛东南部海岸砂丘风暴冲越沉积记录[J].沉积学报,2017,35(6):1133-1143,11.基金项目
国家自然科学基金重点项目(41530962,41706096)[Key Program of National Natural Science Foundation of China, No. 41530962,41706096] （41530962,41706096）
