地质学报Issue(6)：1134-1143,10.
7．65 Ma BP以来天津滨海地区的植被演变特征
Palaeovegetation Evolution Features of the Tianj in Coastal Region Since 7 .65 Ma BP
摘要
Abstract
The Miocene far-ranging deposits in east plain of Tianjin provide the study carrier for palaeovegetation and palaeoclimate since the Miocene.Based on the analysis of pollens in deep borecore drilled in Tanggu,in combination with the chronostratigraphic framework recovered by the palaeomagnetic,this study regains the palaeovegtation evolution featrues for the Tianjin Coastal region since 7.65Ma BP.The results show that regional geomorphology and climate jointly acted on the circumjacent palaeovegetation environment. The corresponding relations between deposits sedimentation rate and herbaceous pollens show that the high sedimentation during period of 6.73~6.43Ma BP and 3.58~3.03Ma BP formed batture and during other periods formed mainly salt marsh and kaline soil.The history of palaeovegetation evolution shows by arborescent pollens that the palaeovegetation was temperate deciduous broad-leaved forests,and stands for warm and humid environment during 6.90~7.65Ma BP,3.61~6.90Ma BP.Palaeovegetation was dominated by arid veld.2.80~3.61Ma BP,the climate became cool and humid,and palaeovegetation turned to mixed coniferous broad leavedforest grass.During the periods of 1.28~2.80Ma BP,the climate became warm and humid and palaeovegetation became temperate deciduous broad-leaved forests.Since 1.28Ma BP,the fluctuations of herbaceous pollens and arborescent pollens revealed the fluctuations of cold-warm climate from middle-late periods of Pleistocene.关键词
晚中新世以来/渤海湾/植被演化/气候变化/沉积速率Key words
Late Miocene/Bohai Bay/palaeovegetation evolution/palaeoclimate evolution/sedimentation rate引用本文复制引用
杨吉龙,秦雅飞,胥勤勉,周新郢,胡云壮,杜东,孟利山..7．65 Ma BP以来天津滨海地区的植被演变特征[J].地质学报,2015,(6):1134-1143,10.基金项目
本文为中国地质调查局项目（编号1212011120170，1212011120089）资助。 （）
