贵阳乌当盆地白垩纪红层的形成及丹霞地貌

贵阳乌当盆地属陆相沉积盆地,白垩纪时期主要沉积以红色冲积扇相和湖相粗粒至细粒碎屑沉积为主。本文从该研究区白垩系红层纵向、横向特征着手,以实测典型沉积地层剖面和浅井编录作为基础,通过对基本层序的分析和沉积序列及沉积相的研究,识别出两个沉积中心和五个沉积相带。沉积相的演变可以从整体上反映当时该盆地的沉积演化历史。红层作为丹霞地貌的成景地层,因造貌岩性、地质构造、外应力作用的差异,在该地区也发育有不同类型的丹霞地貌,这是丹霞地貌在乌当地区的首次提出。

The Formation of Guiyang Wudang Basin Cretaceous Rred Beds and DanXia Landform

Guiyang Wudang basin facies are red alluvial fan face and belongs to the continental sedimentary basin. The main form of sedimentary lacustrine from coarse to fine-grained clastic sedimentary. In this paper, the research of the cretaceous red beds were characteristics of verticality and horizontal. Through the research of basic sequence analysis and sedimentary sequences and facies, which bases a typical measured profile and shallow sedimentary strata, identify the two centers and five sedimentary facies belts. The evolution of sedimentary facies can reflect the overall evolution of the sedimentary basin. The red layer, as the scene of landform formation, because of the differences of the making appearance lithology, geological structure and the role of external stress, have also developed different types of Dan Xia landscape in the region. At last, landform was first proposed in the Wudang area.