内蒙迪彦庙地区寿山沟组地层研究

Study on Sections in Shoushangou Group in Diyanmiao Area of Inner Mongolia

内蒙迪彦庙地区早二叠世寿山沟组地层发育良好,岩性相对稳定,变质、变形程度较低,是研究区范围内早二叠世地层层序研究的理想地区。该课题逐层实测了寿山沟组剖面,从剖面的岩性地层入手,着重分析了迪彦庙地区早二叠世的岩性组合特征、基本层序、沉积旋回特征;同时根据古生物化石类型和组合,推断该区域形成的地质时代和沉积环境。研究表明:寿山沟组剖面厚度为9 598.98m,根据岩性和粒度的大小,可分3个岩段:一段为滨浅海-浅海陆棚沉积;二段、三段为一套浊流沉积岩系,发育特征性浊流沉积构造,为典型的复理石建造。

ShouShangou group strata of Lower Permian developed well in Diyanmiao area with relatively stable lithology, metamorphism, and relatively lowdeformation degree. It is the ideal region for studying stratigraphic sequences of lower series of Permian system. Sections in Shoushangou group have been measured layer - by - layer. Starting from profiles of lithologic and stratigraphic profiles, ithologic characteristics, basic sequences, sedimentary cycle characteristics of lower series of lower Permian in Diyanmiao area have been analyzed. Meanwhile, according to the fossil types and combinations, geological age and sedimentary environment of the region have been conducted. It is showed that thickness of the profile of Shoushangou group is 9598. 98m. According to lithology and particle sizes, it can be divided into three rock： the first section is shallow coastal sedimentary rocks; the second section and third section are a set of turbidite series,and developed characteristic turbidite sedimentary structure. It is a typical flysch construction.