内蒙古阿荣旗太古山早白垩世光华组一段沉积岩层序地层特征

摘要

The first member of Guanghua formation, developed in Taigu Mountain area, is a set of n ormal pyroclastic sedimentary rocks. Based on the rock association, fabrics, vertical variation and the changes of sedimentary environment of the area, one second-order sequence can be recognized, including 2 third-order sequences with 7 fourth-order sequences.The study on the sequence stratigraphy may support the research on the sequence strata of Mesozoic continental basin in Daxinganling region.%阿荣旗太古山西北部陆相盆地光华组一段沉积岩非常发育,为一套正常火山碎屑沉积岩组合.根据岩石组合特征、组构、岩层垂向变化规律、沉积环境变化等分析,本区光华组一段沉积岩自下而上可划分为1个Ⅱ级层序,2个Ⅲ级层序及7个Ⅳ级层序.对其进行层序地层学等方面的研究,为大兴安岭地区中生代陆相盆地层序地层的研究提供参考.