摘要
本文通过对广东江门市蓬江区沉积物钻孔产出有孔虫的鉴定与定量统计分析,结合沉积物中双壳类壳体AMS^(14)C测年结果,揭示了该区晚更新世末期以来经历了陆相-海陆过渡相-陆相的沉积古环境演变过程。海陆过渡相地层中的有孔虫分异度极低、但丰度较高,以近岸浅水种Ammonia beccarii vars.和Elphidium magellanicum为优势种,反映三角洲平原环境受径流影响强烈。位于同一剖面的多个钻孔横向对比显示海水最远达到江门市蓬江区弓田村附近。最大海侵发生应晚于7540aBP(日历年)。
Based on the study of benthic foraminiferal assemblages, lithology and AMS 14C dating, this paper reveals the post-glacial environmental changes of Pengjiang District, Jiangmen, Guangdong Province. The sedimentation experienced a process from terrestrial facies, transitional facies, to terrestrial facies since the late Pleistocene. Benthic foraminifera in the transitional facies show a low diversity and high abundance, and are predominated by Ammonia beccarii vars. and Elphidium magellanicum, which indicates a stronger influence of freshwater. Horizontal comparison of the down-core variation of the foraminifera in this region suggests that a paleo-coastline existed at the Gongtian village. The regional Holocene maximum transgression happened later than 7 540 cal. aBP.
作者
郭启梅
李保华
王晓燕
钟石兰
GUO Qimei LI Baohua WANG Xiaoyan ZHONG Shilan(Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008 University of Chinese Academy of Sciences, Beijing 100049)
出处
《微体古生物学报》
CSCD
北大核心
2017年第1期61-66,共6页
Acta Micropalaeontologica Sinica
基金
中国科学院战略性先导科技专项(XDA05120601
XDA11030104)
国家自然科学基金(41276044)资助~~
关键词
有孔虫
古环境
最大海侵
江门
广东
foraminifera, palaeoenvironment, Holocene maximum transgression, Jiangmen, Guangdong Province, South China
