Late Pleistocene to Holocene Palynofloras and Paleoclimate of Qagan Salt Lake, Inner Mongolia
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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14C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。Abstract: Based on the sporo-pollen analyses of the core samples of Corehole 83-CK1 from the Qagan Salt Lake in the Eren Basin ofthe Inner Mongolia, the sporo-pollen diagram were divided into four palynofloral zones, i. e. Zone I,Zone II,Zone lII,andZone Ⅳ in this paper. In accordance with the characteristics of the sporo-pollen assemblages, the problems on the vegetational evo-lution and the paleoclimatic changes in the past 18 ka as well as the sedimentary environment of salt lake were discussed. Ages ofthe sedimentary section of Corehole 83-CKl are based on14C dating. The results of this study indicate that the late stage of LatePleistocene Epoch (18-15 ka BP) and the early stage of Holocene Epoch (10-5 ka BP) with relatively wet and warm climaticconditions should be the preparatory stages for the formation of saline deposits; the last stage of Late Pleistocene Epoch (15-10 kaBP) and the late stage of Holocene Epoch (S ka BP to the present) with dry and cold climatic conditions should be the main stagesfor the formation and evolution of saline deposits in the Inner Mongolia
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Key words:
- Palynoflora /
- Paleoclimate /
- Quaternary /
- Sedimentary environment /
- Salt Lake /
- Eren Basin
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