地质学报2024，Vol.98Issue(2)：333-345,13.DOI:10.19762/j.cnki.dizhixuebao.2023325
中全新世福建沿海地区海平面波动:基于NDQK5岩芯介形类化石记录
Mid-Holocene sea-level fluctuation in the Fujian coastal area:Evidence from the ostracod records of the core NDQK5
摘要
Abstract
The Fujian coastal area,with its extensive distribution of Quaternary deposits,offers an ideal location for studying relative sea level changes since the late Pleistocene.In this study,we utilized AMS 14C and optical stimulated luminescence(OSL)dating techniques to analyze the high-resolution ostracod records from core NDQK5,which was obtained from Ningde in Fujian Province.Our objective was to reconstruct the relative sea level changes during the Mid-Holocene in this area.The ostracods found incore NDQK5 were located at a depth interval of 4～17.1 m,corresponding to approximately 8.2～6.9 ka BP We identified twenty-six marine ostracod species belonging to twenty-three genera from the core samples.By analyzing the relative abundance of the main ostracod elements,we identified three distinct ostracod assemblages.Ostracod assemblage A,characterized by the dominance of Bicornucytherebisanensis and Sinocytheridea impressa,indicatesa subtidal zone environment.Assemblage B,with Sinocytheridea impressa and Neomonoceratina delicata asthe dominant species,represents the nearshore inner shelf.Assemblage C,marked by the dominance of Sinocytheridea impressa and Loxoconcha ocellifera,indicates an intertidal zone environment.Our ostracod data reveals a continuous rise in sea level in the Fujian coastal area since approximately 8.2 ka BP,with the sea level reaching its highstand between 7.9 and 7.4 ka BP.Subsequently,a decline in sea level existed during the period of 7.4 to 7.0 ka BP,followed by a minor rise.These findings indicate the presence of several minor fluctuations in sea level during the Holocene sea-level highstand period in the Fujian coastal area.Combining our result with the previous studies,we conclude that the sea level change in the Fujian coastal area was probably influenced by meltwater from the ice sheet during the period of 8.2 to 7 ka BP.However,it is probable that the glacio-hydro isostatic adjustment(GIA)effect played a role in controlling sea level after 7 ka BP.关键词
宁德/东海/MIS 1/中全新世高海平面/介形类组合Key words
Ningde/East China Sea/MIS 1/Mid-Holocene sea-level highstand/ostracod assemblages引用本文复制引用
贾宝岩,彭博,王继龙,于俊杰,周保春,赵泉鸿,李保华,王亚琼..中全新世福建沿海地区海平面波动:基于NDQK5岩芯介形类化石记录[J].地质学报,2024,98(2):333-345,13.基金项目
本文为中国科学院先导B项目(编号 XDB26000000)、中国科学院青年促进会项目(编号 2019309)、中国地质调查工程(编号 DD20189505)、福建省海洋物理与地质过程重点实验室开放基金(编号 KLMPG-22-05)以及现代古生物学和地层学国家重点实验室开放课题基金(编号 223129)联合资助的成果. （编号 XDB26000000）
