Stratigraphy of the Mississippian Antler Basin: An AnomalousForeland System

密西西比鹿角盆地的地层学：异常的前陆系统

• 批准号: 8916525
• 负责人: James Trexler
• 金额: $ 5.75万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-02-15 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8916525&HistoricalAwards=false
• 关键词: Stratigraphy; Mississippian; Antler; Basin; AnomalousForeland

The Mississippian Antler basin is a well known but poorly understood sedimentary system. It has been called a foreland, but the geometry and timning of the orogeny that formed the basin have been the subject of diverse speculation. Preliminary work has revealed new stratigraphic detail and several features that are anomalous for a foreland: synorogenic deformation is mild and poorly preserved, deformation took place as several discrete events that caused uplift, the basin was wide and shallow, the foreland was long-lived but the sedimentary section is not thick, and the sedimentary sequences are mostly transgressive. Current foreland basin models are defined by the type of associated orogency, and basin stratigraphy reflects ongoing tectonism. The stratigraphy of the Antler system provides an excellent test of these foreland basin models, because it differs from most foreland systems described to date. This project will emphasize detailed sedimentology of newly recognized stratigraphic sequences, mapping of sedimentary facies, and analysis of synorogenic deformation. The results will be applied to existing models of foreland evolution in order to expand foreland basin models.

密西西比安特勒盆地是一个著名的，但很少 了解沉积体系。 它被称为一个foreland， 但形成盆地的山脉的几何形状和时间 一直是各种猜测的对象。 前期工作 揭示了新的地层细节和几个特征， 异常的前陆：同造山变形是温和的， 保存不佳，变形发生在几个离散的 由于发生了导致隆起的事件，盆地又宽又浅， 前陆存在时间较长，但沉积层不厚， 沉积层序多为海侵型。 当前的前陆盆地模式是由 相关的造山作用和盆地地层学反映了 构造作用 鹿角系统的地层学提供了一个 这是对这些前陆盆地模型的极好检验，因为它与 迄今为止所描述的大多数前陆系统。 该项目将 强调新认识的详细沉积学 地层层序、沉积相绘图，以及 同造山变形分析 结果将应用于 现有的前陆演化模型， 前陆盆地模式