摘要
尽管利用多重地层学方法,对华北地台东缘新元古代地层的划分和对比研究取得了很大的进展,但仍然存在很多争议和问题。今后应在以下几方面展开研究:①寻找新元古代Rodinia超大陆热构造事件和冰川事件的地层学标志,厘定这些标志在地层柱中的位置及其与宏体化石演化阶段的对应关系;②结合碳酸盐岩中C、O和Sr同位素地层学研究,寻找和鉴别新元古代地层中的火山岩和火山碎屑岩,测定其中锆石的U-Pb年龄,解决与华南地区新元古代年代地层的对比问题;③划分“辽南生物群”和“淮南生物群”的不同生物组合,明确各组合的演化历程,深入探讨其谱系归属及与华南地区晚新元古代生物群的关系,完善华北地台东缘新元古代生物地层划分和对比的方案。
There exist many disputes and problems about the stratigraphic division and correlation of the Neoproterozoic on the eastern margin of the North China platform although great advances have been made in the study by using the multiple stratigraphic method. In the future, the study should be conducted in the following aspects: ① look for the stratigraphic marks of the tectono-thermal event and glacial event of the Neoproterozoic Rodinia supercontinent and determine their location in the stratigraphic column and their corresponding relations with the stages of megafossil evolution; ② in combination with the C,O and Sr isotope stratigraphic study, look for and identify volcanic rocks and pyroclastic rocks in the Neoproterozoic, determine their zircon U-Pb ages and solve the problem of the chronostratigraphic correlation with the Neoproterozoic strata of South China; and ③ distinguish between the 'Liaonan biota' and 'Huainan biota', make clear the evolutionary courses of these biotas, further discuss their phylogeny and relation with the late Neoproterozoic biota of South China and improve the scheme of the biostratigraphic division and correlation of the Neoproterozoic on the eastern margin of the North China platform.
出处
《地质通报》
CAS
CSCD
北大核心
2005年第7期589-596,共8页
Geological Bulletin of China
基金
国家自然科学基金项目(40272015)
中国地质调查局专项项目(200213000042)联合资助。
关键词
华北地台东缘
新元古代地层对比
宏体化石
生物地层
年代地层
eastern margin of the North China platform
stratigraphic correlation of the Neoproterozoic
megafossil
biostratigraphy
chronostratigraphy
