摘要
本文基于内蒙古二连盆地查干诺尔盐湖83-CK1井岩芯样品孢粉分析结果,将孢粉谱划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ四个孢粉带;根据孢粉组合特征讨论了晚更新世晚期以来研究区植被发展和气候演变以及盐湖沉积形成环境等同题。83-CK1井沉积剖面年龄根据^(14)C测定。研究结果表明,晚更新世晚期(18～15 ka BP)和全新世早期(10～5 ka BP)气候相对温暖湿润,为盐类矿床形成的预备阶段;晚更新世末期(15～10 ka BP)和全新世晚期(5 ka BP至现代)气候干燥寒冷,是内蒙古盐湖的主要成盐期。
Based on the sporo-pollen analyses of the core samples of Corehole 83 - CK1 from the Qagan Salt Lake in the Eren Basin of the Inner Mongolia,the sporo-pollen diagram were divided into four palynofloral zones,i.e.ZoneⅠ,ZoneⅡ,ZoneⅢ,and Zone IV in this paper.In accordance with the characteristics of the sporo-pollen assemblages,the problems on the vegetational evolution and the paleoclimatic changes in the past 18 ka as well as the sedimentary environment of salt lake were discussed.Ages of the sedimentary section of Corehole 83 - CK1 are based on ^(14)C dating.The results of this study indicate that the late stage of Late Pleistocene Epoch(18～15 ka BP) and the early stage of Holocene Epoch(10～5 ka BP) with relatively wet and warm climatic conditions should be the preparatory stages for the formation of saline deposits;the last stage of Late Pleistocene Epoch(15～10 ka BP) and the late stage of Holocene Epoch(5 ka BP to the present) with dry and cold climatic conditions should be the main stages for the formation and evolution of saline deposits in the Inner Mongolia.
出处
《沉积学报》
CAS
CSCD
北大核心
1997年第A12期147-152,共6页
Acta Sedimentologica Sinica
基金
中国科学院兰州地质研究所所长基金资助项目(编号:E97-07-01)
关键词
孢粉
植物群
古气候
第四纪
沉积环境
盆地
Palynoflora
Paleoclimate
Quaternary
Sedimentary environment
Salt Lake
Eren Basin
