基准面原理在古地理分析中的应用

Application of base level to the analysis of paleogeography.

利用基准面原理对华北地区中、晚石炭世古地理进行了研究。划分出短期、中期和长期基准面旋回，并对基准面长期旋回进行了对比。在此基础上，分别将基准面上升期和下降期作为编图单元，进行古地理分析，对本地区沉积面貌有了新的认识：上升期（本溪组）发育两大体系，下降期（太原组）发育四大体系。认为：以基准面半旋回为编图单元，中、晚石炭世的沉积古地理的面貌更加清晰且规律性更强，在本区进行海陆过渡相基准面原理地层分析是可行的。图４参３（邹冬平摘）

Guided by the base level theory, the author tried to analyze the paleogeography of the Middle and Late Carboniferous epoch in North China. Smallscale, mediumscale and largescale cycles of base level were divided. And the correlation of sections in this area was also established. By choosing the different cycle as the mapping unit, the author studied the paleogeography of this area detailed and got some new understandings: two depositional systems developed during the rising period of base level, four depositional systems developed during the falling period of base level.