Incremental Retrodeformation of NE Utah Thrust Belt using Late Cretaceous-Paleocene Synorogenic Conglomerates

该项目是对结构的调查， 近源岩的特征、物源和沉积学 晚白垩世-古新世同造山砾岩， 犹他州东北部。 因为这些沉积物中含有 构造和发育良好的碎屑类型的去顶序列， 它们应该对NE的增量逆变形有用 犹他州冲断带。 需要解决的一般性问题包括： (1)近端的结构特征是什么， 推力衍生风扇，这些结构可以用来 让联合企业倒退 (2)什么是空间 角度不整合面与大尺度的关系 在这些近端扇中的形态地层岩体， 这些关系为解释构造运动提供了新的思路 逆冲断层对沉积物分布的控制作用 (3)什么 结构控制着沉积物的产生和分布， 冲断带-大规模的构造顶点或前缘 背斜？ 除了这些一般性问题外， 该研究将解决一些长期存在的区域问题， 东北犹他州等冲断带的南部终点位置 克劳福德逆冲断层和威拉德逆冲断层 床单。 本研究将采取综合方法， 逆冲带与断层之间连接带的复杂性 以及邻近的盆地 拟议研究的结果将 对构造地质学家、前陆盆地地层学家 以及沉积学家和盆地建模师。

This project is an investigation of the structural characteristics, provenance, and sedimentology of proximal synorogenic conglomerates of Late Cretaceous-Paleocene age in northeastern Utah. Because these deposits contain progressive structures and well developed unroofing sequences of clast types, they should be useful for incremental retrodeformation of the NE Utah thrust belt. The general questions to be addressed include: (1) What are the structural characteristics of proximal, thrust-derived fans, and can these structures be used to retrodeform the conglomerates? (2) What are the spatial relationships between angular unconformities and large-scale morphostratigraphic lithosomes in these proximal fans, and can these relationships shed new light on interpretations of tectonic control on sediment distribution during thrust faulting? (3) What structures control the production and distribution of sediment in thrust belts--large scale structural culminations or frontal tip anticlines? In addition to these general questions, the proposed study will address several longstanding regional problems in the NE Utah thrust belt, such as the location of the southern terminus of the Crawford thrust and the former extent of the Wilard thrust sheet. This study will take an integral approach to working out the complexities of the linking zone between the thrust belt-proper and the adjacent basin. The results of the proposed research will be of use to structural geologists, foreland-basin stratigraphers and sedimentologists, and basin modelers.