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

伸展构造中的一个基本问题是解体--三维--半地槽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6个岩心记录的固定周期米兰科维奇型湖旋回的厚度和相的变化来分析盆地沉降的横向和沿走向的变化，作为NSF资助的另一个研究项目的一部分，以及从纽约，新泽西州纽瓦克裂谷盆地其他部分的相关露头，还有宾夕法尼亚州。这样的分析还将有助于识别同沉积构造。垂直剖面中旋回厚度的变化将被用来限制影响盆地历史(演化)发展的因素，包括其随时间的增长。将建立物质平衡的盆地充填模型，受盆地的已知几何形状(基于现有的地震反射剖面)以及沉降变化的约束，以评估均匀沉降和伸展速率以及均匀的沉积物和水的输入速率对产生盆地地层记录的“背景”或内在影响。然后，可以利用实际地层(记录在岩心中)与充填模型简化预测的偏差来评估沉降率和伸展率的变化以及沉积物和供水的变化。这项研究除了加深我们对半地堑三维发育的认识外，还将制约北美东部盘古大陆早期裂谷历史的形成。

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.