摘要
对渤海中央盆地B92-3孔(芯长420cm)、B92-1孔(芯长420cm)以及莱州湾B92-2孔(芯长330cm)柱状样进行了介形类属种、丰度和分异度分析,并将B92-3孔和B92-1孔的介形类划分出6个组合带。根据渤、黄海地区不同沉积环境中现代介形类的分布,将剖面中的介形类分成滨岸-河口区的Sinocytheridea组合和近岸区的Munseyella组合。按照地层14C年代以及剖面中Sinocytheridea组合分子和Munseyella组合分子的相对丰度变化,讨论了渤海晚冰期后期以来的古环境演化历史:晚冰期为河流、湖沼环境;大约10000aB.P.开始海侵,早全新世属滨岸-河口沉积;8700aB.P.前后开始水深加大,盐度提高;2400aBP以后水深逐渐降低。
Species, abundance and diversity of ostracodes from 3 cores in the Bobai Sea were analysized;among them, Core B92-3 (420cm in length) and Core B92-1 (420cm) were obtained from the Central Basin and Core B92-2(330cm)from the Laizhou Bay. Based on the relative abundance of ostracode species, 6 assemblages were recognized in the profiles of Core B92-3 and Core B92-1.
出处
《古生物学报》
CAS
CSCD
北大核心
1995年第5期635-646,共12页
Acta Palaeontologica Sinica
基金
中国科学院"八五"重点科研项目
关键词
介形类
渤海
环境变迁
晚冰期
ostracode, Bohai Sea, environmental change, Late Glacial Period,Holocene