论文部分内容阅读
通过中国北方5.30Ma以来含丰富哺乳动物化石的典型剖面的磁性地层研究,建立5.30Ma以来中国北方陆相哺乳动物群与磁性地层序列对比。中国黄土记录了Brunhes正极性带与Matuyama负极性带,黄土年龄约2.50MaB.P.,其中发现有午城动物群、公王岭动物群、阳郭动物群、陈家窝动物群与靖远动物群。三门组记录了Matuyama负极性带下段,年龄约1.20—2.50Ma,其中发现有三门动物群。静乐剖面的静乐红土对应于Gauss正极性带上段,年龄约2.50—3.00Ma,其中发现有静乐贺丰动物群。游河组记录了Gauss正极性带,年龄约2.50—3.40Ma,其中发现游河动物群。泥河湾沉积对应于Brunhes正极性带、Matuyama负极性带、Gauss正极性带,年龄约0.13—3.40Ma。其中小长梁剖面记录了Brunhes正极性带与Matuyama负极性带上段(含Jaramilo亚带),年龄约0.13—1.00Ma(其中含化石及石器地层年龄约0.90—1.00Ma)。榆社盆地麻则沟组记录了Gauss正极性带(2.50—3.40Ma),高庄组记录了Gilbert负极性带(3.40—5.30Ma)。
Through the magnetic stratigraphic study of the typical section of mammalian fossils since 5.30Ma in northern China, the sequence comparison between continental mammalian assemblages and magnetic stratigraphy in northern China has been established since 5.30Ma. Chinese loess records the positive Brunhes zone and the negative zone of Matuyama with a loess age of about 2.50MaB. P. , Which found that there are afternoon animal group, Gongwangling animal group, Yang Guo animal group, Chen Jiaowo animal group and Jingyuan animal group. The Sanmen Formation recorded the lower belt of Matuyama, with an age of about 1.20-2.50Ma, of which three were found. The Jingle red clay of the Jingle section corresponds to the upper section of the positive polarity band of the Gauss, with an age of about 2.50-3.00 Ma, in which a group of Jinglei Hefeng animals is found. The Pleistocene recorded the positive Gauss band with an age of about 2.50-3.40 Ma, in which fauna was found. The Nihewan deposit corresponds to the Brunhes positive zone, the Matuyama negative zone, and the Gauss positive zone with an age of about 0.13-3.40Ma. The Xiaoliangliang section recorded the Brunhes positive zone and the Upper Matuyama negative zone (including the Jaramilo sub-zone) with an age of 0.13-1.00 Ma (including fossil and lithic strata of about 0.90-1.00 Ma) . The Yueshe Basin Mazigou Formation recorded the Gauss positive polarity band (2.50-3.40Ma) and the Gaozhuang Formation recorded the Gilbert negative polarity band (3.40-5.30Ma).