Deltaic Coals of Ferron Sandstone Member of Mancos Shale: Predictive Model for Cretaceous Coal-Bearing Strata of Western Interior
Deltaic Coals of Ferron Sandstone Member of Mancos Shale: Predictive Model for Cretaceous Coal-Bearing Strata of Western Interior
复制标题
Mancos 页岩 Ferron 砂岩段三角洲煤：西部内陆白垩纪含煤地层的预测模型
DOI：
--
复制
发表时间：
1981
期刊：
影响因子：
--
通讯作者：
T. A. Ryer
中科院分区：
文献类型：
--
作者：
T. A. Ryer
Mancos页岩的上白垩统Ferron砂岩段是犹他州中部Emery煤田的含煤单元，显示出在晚Turonian时期沿内白垩统海道西岸线存在的一个以河流为主的片状三角洲体系中碎屑沉积物的堆积。五个旋回的三角洲沉积，每一个都包含一个主要的煤层或煤带。金刚砂田主要煤层的几何形状与其伴生的三角洲前缘砂岩单元的几何形状之间存在着明确的成因关系。每层煤层较厚的部分从相关联的三角洲前缘砂岩的向陆挤压区附近向陆延伸约10公里。这种成因关系构成了预测模型的基础，可用于在西部内陆白垩纪含煤地层中设计更具成本效益的勘探方案。
The Upper Cretaceous Ferron Sandstone Member of the Mancos Shale, the coal-bearing unit of the Emery coalfield in central Utah, shows accumulation of clastic sediments in a lobate, river-dominated deltaic system that existed along the western shoreline of the Interior Cretaceous seaway during late Turonian time. Five cycles of deltaic sedimentation, each containing one major coal bed or coal zone, are represented. A clear genetic relationship exists between the geometries of the major coal beds of the Emery field and the geometries of the delta-front sandstone units with which they are associated. The thicker part of each coal bed extends from the vicinity of the landward pinch-out of the associated delta-front sandstone landward to a distance of about 10 km. This genetic relation forms the basis of a predictive model that can be used in designing more cost-effective exploration programs in coal-bearing strata of Cretaceous age in the Western Interior.