The Late Oligocene-Early Pleistocene sporopollen assemblages and paleovegetation succession of core ZkA01 in Hetou town, Leizhou Peninsula of Guangdong Province
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摘要:
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。
Abstract: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.
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Key words:
- sporopollen assemblage /
- paleo-vegetation type /
- paleoclimate /
- Cenozoic /
- Leizhou Peninsula
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表 1 研究区与南海北部大陆边缘盆地新生代地层格架(据参考文献[12]修改)
Table 1. Cenozoic stratigraphic framework of the study area and the northern continental marginal basins of the South China Sea
地质年代 年龄
/Ma珠江口盆地 琼东南盆地 莺歌海盆地 北部湾盆地 雷琼盆地
(本文)纪 世 新近纪 上新世 2.58 琼海组 乐东组 乐东组 湛江组 湛江组 中新世 晚 5.33 万山组 莺歌海组 莺歌海组 望楼港组 望楼港组 中 11.63 粤海组 黄流组 黄流组 灯楼角组 灯楼角组 早 15.97 朝江组 梅山组 梅山组 角尾组 角尾组 古近纪 渐新世 晚 23.03 珠江组 三亚组 三亚组 下洋组 下洋组 28.1 珠海组 陵水组 陵水组 涠洲组 涠洲组 
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