广东雷州半岛河头镇ZKA01钻孔剖面晚渐新世—早更新世孢粉组合及古植被演替

The Late Oligocene-Early Pleistocene sporopollen assemblages and paleovegetation succession of core ZkA01 in Hetou town,Leizhou Peninsula of Guangdong Province

对广东省雷州半岛新生代钻孔ZKA01中的孢粉化石数据进行了系统研究。通过孢粉数据分析,该钻孔自下而上可划分出8个孢粉组合。晚渐新世,该地区植被的垂直分带明显,周围高山有针叶林分布,平原上生长着落叶阔叶与常绿阔叶混交林,气候温凉湿润。早中新世,该地区的植被类型由落叶阔叶与常绿阔叶混交林演变为常绿阔叶林和热带雨林,气候由温暖干旱变为炎热潮湿。晚中新世,该地区的植被类型又演变为山地针叶林和平原上的落叶阔叶与常绿阔叶混交林,气候重新变得温暖湿润。上新世—早更新世,该地区的植被类型为落叶阔叶与常绿阔叶混交林,气温变化波动明显,总体为温凉湿润的气候。孢粉组合所反映的晚渐新世—早更新世气候变化特征与全球气候变化趋势具有较好的可比性。

The data of Cenozoic sporopollen fossils obtained from ZKA01 drill hole in Leizhou Peninsula of Guangdong Province were systematically analyzed.Through the analysis of spore-pollen data,8 sporopollen assemblages can be recognized from this drill hole.In the late Oligocene,the vegetation types in this area reflected the obvious vertical distribution of vegetation;coniferous forests were distributed in the surrounding mountains,and deciduous broad-leaved and evergreen broad-leaved mixed forests grew in the plain.In the early and middle Miocene,the vegetation types in this area evolved from deciduous broad-leaved and evergreen broad-leaved mixed forests into evergreen broad-leaved forests and tropical rainforests.In the late Miocene,the vegetation types in this area evolved into coniferous forests in mountain areas and deciduous broad-leaved and evergreen broad-leaved mixed forests in plain areas.During the Pliocene-Early Pleistocene period,the vegetation types in this area were deciduous broad-leaved and evergreen broad-leaved mixed forests,and the temperature changes fluctuated significantly.The climate change characteristics of Late Oligocene to Early Pleistocene period were reflected by spore-pollen assemblages,which had good comparability with the trend of global climate change.