下辽河平原晚更新世泥炭的发现及其古气候意义  

Discovery of the Late Pleistocene Peat in the Lower Liaohe River Plain and Its Paleoclimatic Significance

作　　者：张淑芹[1,2] 刘玉英[3] 

机构地区：[1]东北亚生物演化与环境教育部重点实验室,长春130026 [2]吉林大学古生物学与地层学研究中心,长春130026 [3]吉林大学应用技术学院,长春130022

出　　处：《吉林大学学报（地球科学版）》2013年第3期845-850,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40972076;41172008);吉林大学平台基地建设项目(450060326043);吉林大学基本科研业务费项目(450060445273)

摘　　要：位于沈阳市东部和西部的2个钻孔剖面均有晚更新世晚期泥炭发育。14 C测年结果表明:东部钻孔泥炭层形成于玉木亚间冰期晚期,西部泥炭层形成于玉木亚间冰期结束之后。孢粉分析结果表明:东部钻孔剖面中的泥炭以暖温带落叶阔叶植物花粉为主,指示温暖湿润的气候环境;西部钻孔剖面中的泥炭以温带草本被子植物花粉为主,山地针、阔叶植物花粉为辅,指示温干偏湿的气候环境。定量古气候分析结果表明,玉木亚间冰期晚期沈阳地区与现今气候相当;玉木亚间冰期结束之后,沈阳地区的气候比现在稍冷。Late Pleistocene peat deposits are found in the two drilling cores located to the east and west of Shenyang City separately.The peat from the eastern drilling core was formed in the later Yumuya inter-galacial period and peat from the western core was formed after the Yumuya inter-galacial period.Pollen plant analyses of these two peat deposits show that the peat from the drilling core in the east contain mostly of pollen of deciduous broad-leaf plants indicative of warm and humid climate and those from the drilling core in the west contains pollen of angiosperm and minor needle and broad leaf plants in mountains rerpesentive of temperate and try climate.Quantative paleo-climate analysis suggests that the climate in the later Yumuya inter-galacial period was almost same as the present climate in Shenyang,but the climate after the Yumuya inter-galacial period was a little cooler than today in Shenyang.

关 键 词：泥炭 古气候 晚更新世 下辽河平原 

分 类 号：P46[天文地球—大气科学及气象学]