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

CAA：犹他州更新世博纳维尔湖矿床的相结构和地层异质性

• 批准号: 9303519
• 负责人: Marjorie Chan
• 金额: $ 6万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9303519&HistoricalAwards=false
• 关键词: CAA; Facies; Architecture; Stratigraphic; Heterogeneities

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.

这是一项研究犹他州更新世博纳维尔湖沉积地层非均质性和相结构特征的建议，目的是为了更好地了解流经博纳维尔湖和类似古老沉积的地下水中沉积相和组构的控制。建立的气候敏感盆地的湖泊地层学为沉积学研究提供了一个框架。这项研究的目的是：1.通过对几何学、层序叠加、沉积构造和沉积组构的分析，检查和记录选定油田地点的相结构。2.从岩石学和结构尺度上比较相的沉积组构，并结合孔隙度和渗透率的测量来确定地层的非均质性。3.用二维地统计模型(如半方差函数)量化沉积性质、结构和地层的非均质性。这项研究具有重要意义，因为它将极大地有助于理解博纳维尔湖沉积物中的表面污染问题，并将为评估类似的、较老的盆地充填含水层相中的流动单元(或水文地质相)提供类似的参考。