CAA: Facies Architecture and Stratigraphic Heterogeneities in Pleistocene Lake Bonneville Deposits, Utah

为了更好地了解博纳维尔湖及类似更老沉积层地下水流动中沉积相和组构的控制作用，本文提出了犹他州更新世博纳维尔湖沉积层的地层非均质性和相构型特征。已建立的气候敏感盆地湖泊地层学为沉积学研究提供了框架。本研究的目的是：1。通过分析几何形状、分层堆叠、沉积结构和沉积构造，检查和记录在选定的现场位置的相结构。2. 在岩石学和结构尺度上比较沉积相结构，并测量孔隙度和渗透率，以确定地层的非均质性。3. 用二维地质统计模型（如半变异图）量化沉积性质、建筑和地层非均质性。这项研究意义重大，因为它将极大地有助于理解博纳维尔湖沉积物的表面污染问题，并将为评估类似的、更古老的盆地填充含水层相的流动单元（或水文地质相）提供类似物。

This is a proposal to characterize stratigraphic heterogeneities and facies architecture in Pleistocene Lake Bonneville deposits of Utah, in order to better understand the control of depositional facies and fabrics in ground water flow through Lake Bonneville and similar older deposits. The established lake stratigraphy of the climatically sensitive basin provides a framework for sedimentologic study. The objective of this study are to: 1. Examine and document facies architecture in select field localities through analysis of geometries, hierarchical stacking, sedimentary structures, and depositional fabrics. 2. Compare depositional fabrics of facies on a petrologic and textural scale, with measurements of porosity and permeability to determine the stratigraphic heterogeneities. 3. Quantify sedimentary properties, architecture and stratigraphic heterogeneities with 2-dimensional geostatistical modeling (e.g. semivariograms). This study is significant in that it will greatly contribute to understanding problems of surface contamination in Lake Bonneville sediments and will provide analogues for evaluating flow units (or hydrogeologic facies) in similar, older basin-fill aquifer facies.