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天津北部4.00Ma BP以来古植被与古气候
引用本文:范淑贤,翟子梅,张学斌,吉云平,刘林敬.天津北部4.00Ma BP以来古植被与古气候[J].古地理学报,2010,12(6):655-664.
作者姓名:范淑贤  翟子梅  张学斌  吉云平  刘林敬
作者单位:1. 中国地质科学院水文地质环境地质研究所,河北石家庄,050061
2. 天津市地质调查研究院,天津,300191
基金项目:天津城市调查项目“地质松散沉积地质结构”(编号:1212010511104-01-01); 中国地质科学院水文地质环境地质研究所基本科研业务费项目(编号:SK07011,SK200810)联合资助
摘    要:依据CQJ1孔275块孢粉样品分析结果,结合岩性特征和测年资料,建立了天津北部4.00MaBP以来古植被与古气候变化序列。大约在3.60—4.00MaBP,天津北部植被以荒漠草原为主,气候冷干;3.44—3.60Ma,BP植被为疏林草原,气候温和湿润;3.18—3.44MaBP植被为荒漠草原,气候冷干;2.58—3.18MaBP植被以针阔叶混交林草原为主,气候温暖湿润;1.90—2.58MaBP植被以疏林草原为主,气候温凉偏干;1.74—1.90Ma,BP植被为荒漠草原,气候冷干;1.30—1.74MaBP植被以针阔叶混交林为主,气候温暖潮湿;0.78—1.30MaBP植被为以针叶树种为主的针阔叶混交林草原,气候温和湿润;0.15—0.78MaBP植被以针阔叶混交林为主,气候温暖潮湿;0.15MaBP以来,孢粉丰度呈现有规律的变化,3个高丰度层段分别相当于MIS(海洋氧同位素)1、3、5阶段,与河北平原东部具有可比性。

关 键 词:孢粉记录  古植被  古气候  气候转型  天津北部  

Palaeovegetation and palaeoclimate since 4.00 Ma BP in northern Tianjin
Fan Shuxian,Zhai Zimei,Zhang Xuebin,Ji Yunping,Liu Linjing.Palaeovegetation and palaeoclimate since 4.00 Ma BP in northern Tianjin[J].Journal of Palaeogeography,2010,12(6):655-664.
Authors:Fan Shuxian  Zhai Zimei  Zhang Xuebin  Ji Yunping  Liu Linjing
Institution:Fan Shuxian1 Zhai Zimei2 Zhang Xuebin2 Ji Yunping1 Liu Linjing11 Institute of Hydrogeology and Environmental Geology,CAGS,Shijiazhuang050061,Hebei2 Tianjin Institute of Geological Survey,Tianjin300191
Abstract:Based on the analysis of the spore-pollens in 275 samples from borehole CQJ1 drilled in northern Tianjin,combining with lithology and dating informations,the sequences of palaeovegetation and palaeoclimate evolvement since 4.00 Ma BP have been established. During the period of 3.60-4.00 Ma BP,the vegetation mainly was desert steppe,and the climate was cool and dry in northern Tianjin.During the period of 3.44-3.60 Ma BP,the vegetation was grass savanna,and the climate was warm and wet. During the period of ...
Keywords:pollen record  palaeovegetation  palaeoclimate  climatic transition  northern Tianjin  
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