Palynological investigation of a Holocene profile section from the Palaeo-Gaxun-Nur-Basin  

作　　者：D.Demske S.Mischke 

机构地区：[1]Institut f geologische Wissenschaften (Palntologie), FB Geowissenschaften, Freie UniversitBerlin, Malteser Str. 74-100 D, 12249 Berlin, Germany ,Institut f geologische Wissenschaften (Palntologie), FB Geowissenschaften, Freie UniversitBerlin, Malteser Str. 74-100 D, 12249 Berlin, Germany

出　　处：《Chinese Science Bulletin》2003年第14期1418-1422,共5页

摘　　要：Palynological investigations on lacustrine sediment samples revealed a general dominance of open Artemisia-Chenopodiaceae vegetation in the Palaeo-Gaxun- Nur-Basin (Inner Mongolia) between 5250 and 3500 cal. aBP. Riverside woods (Hippopha? Populus) developed between 35003250 cal. aBP and reflect moister growing conditions. During the following moist-dry transition pronounced cooling occurred around 3000 cal. aBP, in upper elevations favouring the spread of montane woods (Picea, Betula). Aridity strongly increased from 2900 to 2700 cal. aBP. The recorded vegetational and environmental changes after 3500 cal. aBP can be correlated with glacier advances in the mountains and with a humid phase in the Tengger Shamo followed by desertification.Palynological investigations on lacustrine sediment samples revealed a general dominance of open Artemisia-Chenopodiaceae vegetation in the Palaeo-Gaxun-Nur-Basin (Inner Mongolia) between 5250 and 3500 cal. aBP. Riverside woods (Hippopha?, Populus) developed between 3500–3250 cal. aBP and reflect moister growing conditions. During the following moist-dry transition pronounced cooling occurred around 3000 cal. aBP, in upper elevations favouring the spread of montane woods (Picea, Betula). Aridity strongly increased from 2900 to 2700 cal. aBP. The recorded vegetational and environmental changes after 3500 cal. aBP can be correlated with glacier advances in the mountains and with a humid phase in the Tengger Shamo followed by desertification.

关 键 词：孢粉学 全新世 纵剖面 湖泊沉积物 中国 内蒙古 

分 类 号：P534.632[天文地球—第四纪地质学]