Tectonostratigraphic Development of the Early Mesozoic Newark Basin, Eastern North America

北美东部早中生代纽瓦克盆地的构造地层发育

• 批准号: 9017785
• 负责人: Roy Schlische
• 金额: $ 9.04万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-05-15 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017785&HistoricalAwards=false
• 关键词: Tectonostratigraphic; Development; Early; Mesozoic; Newark

A fundamental problem in extensional tectonics is unraveling- three dimensions-the growth and evolution of half-graben-type basins and their basin-bounding faults. This is a project to analyze the transverse and along-strike variations in basin subsidence through a study of changes in thickness and facies of fixed-period Milankovitch-type lacustrine cycles recorded in six cores to be drilled as part of another NSF-funded research project as well as from correlatable outcrops from other parts of the early Mesozoic Newark rift basin of New York, New Jersey, and Pennsylvania. Such an analysis will also aid in the identification of synsedimentary structures. Variations in cycle thicknesses in a vertical section will be used to constrain the factors affecting the basin's historical (evolutionary) development, including its growth through time. Mass-balance basin filling models, constrained by the known geometry of the basin (based on available seismic reflection profiles) as well as by variations in subsidence, will be constructed to assess the "background" or intrinsic effects of uniform subsidence and extension rates and uniform input rates of sediment and water on generating the basin's stratigraphic record. Deviations of the actual stratigraphy (recorded in the cores) from the filling model's simplified predictions can then be used to assess changes in subsidence and extension rates as well as changes in sediment and water supply. In addition to furthering our understanding of the three- dimensional development of half-graben, this study also will constrain the early rifting history of Pangaea in eastern North America.

伸展构造学的一个基本问题是揭示半地堑型盆地及其盆地边界断裂的生长和演化。这是一个项目，通过研究固定时期米兰科维奇型湖泊旋回的厚度和相的变化来分析盆地沉降的横向和沿向变化，该研究记录在六个岩心中，作为另一个nsf资助的研究项目的一部分，以及来自新泽西州纽约纽瓦克裂谷盆地早中生代其他部分的相关露头。和 宾夕法尼亚州。这样的分析也将有助于同沉积构造的识别。在垂直剖面上旋回厚度的变化将用于限制影响盆地历史（演化）发展的因素，包括其随时间的增长。受已知盆地几何形状（基于可用的地震反射剖面）以及沉降变化的限制，将构建质量平衡盆地填充模型，以评估均匀沉降和伸展速率以及沉积物和水的均匀输入速率对生成盆地地层记录的“背景”或内在影响。实际地层（记录在岩心中）与填充模型简化预测的偏差可以用来评估沉降和延伸速率的变化，以及沉积物和供水的变化。该研究不仅有助于进一步认识半地堑的三维发育，而且对北美东部泛大陆的早期裂陷史也有一定的约束作用。