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南华北盆地晚石炭世—早二叠世主要为陆表海充填沉积。通过层序界面识别和层序地层划分,建立层序地层格架,将研究区晚石炭世—早二叠世地层划分为1个Ⅱ级陆表海充填层序,3个Ⅲ级层序(Sq1—Sq3),分别对应晚石炭世巴什基尔-格舍尔期、早二叠世紫松期和隆林期,同时对3个层序的特征及演化进行了分析。根据层序地层学研究对Sq1~Sq3进行古地理重建,发现陆表海充填总体上为海退序列,物源主要来自北缘阴山隆起;同时也证实了海侵转换面的存在,全球海平面上升和板缘构造运动共同塑造了南华北盆地晚石炭世—早二叠世特殊的古地理演化过程。
The Late Carboniferous-Early Permian in the South Huabei Basin mainly consisted of land surface seafill sediments. Through sequence boundary identification and sequence stratigraphic division, the sequence stratigraphic framework is established. The Late Carboniferous-Early Permian stratigraphy in the study area is divided into one grade Ⅱ surface seafill filling sequence, three grade Ⅲ sequence (Sq1- Sq3) corresponding to the Late Carboniferous Bashkir - Gesheelian, Early Permian igneous and Longling periods, respectively, and the characteristics and evolution of the three sequences were analyzed. According to the sequence stratigraphy study on the paleogeographic reconstruction of Sq1 ~ Sq3, it is found that the surface seafill seafloor is generally a receding sequence with the source mainly coming from the Yinshan uplift in the northern margin. At the same time, it also confirms the existence of transgressive transitional surface, global sea level rise and Together with the tectonic movement of the margin, the special paleogeographic evolution of the southern Carboniferous and the Early Permian in the South China-Northern Basin has been shaped.