摘要
本文对辽宁南票及内蒙古大青山区上石炭—下二叠统地层中火山事件沉积进行了系统的岩矿鉴定、差热、X光、电镜测试及微量稀土元素定量分析,两剖面自下而上共划分出12期火山事件沉积序列,包括了34～39层火山事件沉积层。由于各层均具有特定的岩石矿物及地球化学特征,为进一步查明华北板块北缘火山事件沉积的展布规律,并利用火山事件层作为标志层进行地层对比,提供了新的依据。
According to systematic petro-mineral appraisal, differential thermal. X-ray differentiation and electron-microscope tests and quantitative analyses of trace rare elements from the volcanic event deposits of the Upper Carboniferous? Lower Permian series in Nanpiao, Liaoning, and Daqingshan, Inner Mongolia, deposit sequences of 12 volcanic events have been identified, including the 34~39th volcanic beds from bottom to top. Because the volcanic beds have their respective petro-mineral and geochemical features, they will provide a reliable basis for further proving the time-space distribution pattern of the volcanic event deposits on the northern margin of the North China plate and making stratigraphic correlation taking the volcanic beds as maker beds.
出处
《地质论评》
CAS
CSCD
北大核心
2001年第2期175-183,T003,共10页
Geological Review
基金
国家自然科学基金(编号49762094)
关键词
晚古生代
火山事件
岩石
矿物
地球化学特征
华北板块
沉积序列
Paleozoic strata
volcanic event deposits
petro-mineral and geochemical features
stratigraphic correlation
