Push Moraine Deformation - Experimental and Field Studies

推动冰碛变形 - 实验和现场研究

• 批准号: 0229985
• 负责人: Daniel Davis
• 金额: $ 5.29万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0229985&HistoricalAwards=false
• 关键词: Push; Moraine; Deformation; Experimental; Field

Push Moraine Deformation - Experimental and Field StudiesGEOLOGY & PALEONTOLOGY PROGRAMEAR-0229985SUNY Stony BrookDaniel M. DavisABSTRACT This project is directed toward the study of deformation in Pleistocene push moraines, using a combination of laboratory analog modeling and structural field mapping. The experimental component of the project is designed to explore how the distribution and style of deformation in sediment pushed by a glacier depends upon the kinematics of the push and the composition and frozen or unfrozen state of the deforming sediment. The goal is to use quantitatively analyzed lab models in order to understand better the great variety of folds, faults, and associated structures that are widely observed in push moraines. The field component of the project is directed towards applying to the push moraines of Long Island two techniques potentially capable of shedding light on deformation of the kind being modeled in the lab component of this project. Measurements of clast fabric axes in various parts of the lobate Harbor Hill Moraine allow comparison with the resultsof lab models, testing the idea that clast orientations record the distribution of strain in the moraine. Ground Penetrating Radar (GPR) is ideally suited to porous sediments, but has not been extensively applied to push moraine deformation. Imaging of buried structures using GPR offers the possibility of mapping otherwise unobservable folds and faults. Incombination with the results of lab modeling, these field investigations are intended to advance the application of structural and tectonic techniques to understanding the development of glacial push moraines.

推冰碛变形-实验和实地研究地质学古生物学计划MEAR-0229985 SUNY Stony BrookDaniel M.戴维斯摘要 本计画系以实验室模拟模拟与构造野外填图相结合的方法，研究更新世推覆冰碛的变形。 该项目的实验部分旨在探索冰川推动的沉积物变形的分布和方式如何取决于推动的运动学以及变形沉积物的成分和冻结或解冻状态。 我们的目标是使用定量分析的实验室模型，以更好地了解各种各样的褶皱，断层，和相关的结构，被广泛观察到的推流冰碛。 该项目的现场组成部分是针对长岛的推冰碛应用两种技术，可能能够揭示在该项目的实验室组成部分中建模的那种变形。 测量碎屑织物轴在各个部分的叶状港山冰碛允许resultsof实验室模型进行比较，测试的想法，碎屑的方向记录在冰碛应变的分布。 探地雷达（GPR）非常适合多孔沉积物，但尚未广泛应用于推动冰碛变形。 使用地质雷达对埋藏结构成像提供了绘制否则无法观察到的褶皱和断层的可能性。 结合实验室模拟的结果，这些实地调查的目的是推进应用结构和构造技术来了解冰川推流冰碛的发展。