Effects of Physical Properties Mechanical State on the Deformation of Porous Sediments

物理性质力学状态对多孔沉积物变形的影响

基本信息

  • 批准号:
    8720754
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing grant
  • 财政年份:
    1988
  • 资助国家:
    美国
  • 起止时间:
    1988-05-01 至 1991-04-30
  • 项目状态:
    已结题

项目摘要

The mechanical behavior of porous sediments is important for the understanding of deformation in accretionary prisms, subsiding and spreading basins, and other settings in which "soft" sediments are subjected to tectonic or gravitational stresses. Unfortunately the relationships among physical properties, mechanical state, and structural fabric for these sediments are very poorly known, which has impeded the development of quantitative geomechanical models. A series of mechanical tests have been made moderately porous (20-40%) silty clays (both natural and artificially consolidated) that will allow us to correlate the physical properties and mechanical state of these sediments with the structural fabrics produced during deformation. We investigated strength surface for laboratory consolidated sediments, as depicted in a 3-dimensional space of effective mean stress, differential stress, and void ratio, at mean stresses typical of geologic conditions in accretionary prisms. For natural sediments from basinal sequences we measured in-situ strength and analyze the failure fabrics produced during bedding parallel shortening. For the study of naturally deformed sediments we have several samples from DSDP sites in the Nankai accretionary prism. Structural fabric analyses included optical microscopy for measurement of the overall and internal geometries of the failure zones, microprobe studies for porosity variations, and x-ray pole figure goniometry for fabric anisotropy and strain.
多孔沉积物的力学行为对于理解增长棱柱、下沉和扩张盆地以及“软”沉积物受构造应力或重力作用的其他环境中的变形很重要。不幸的是,这些沉积物的物理性质、力学状态和结构组构之间的关系知之甚少,这阻碍了定量地质力学模型的发展。对中等孔隙度(20-40%)的粉质粘土(天然和人工固结)进行了一系列力学测试,使我们能够将这些沉积物的物理性质和力学状态与变形过程中产生的结构组构联系起来。我们研究了实验室固结沉积物的强度表面,如有效平均应力、差异应力和孔隙率的三维空间所描绘的,在平均应力下的典型地质条件下的增长棱柱。对盆地层序中的天然沉积物进行了现场强度测量,分析了层理平行缩短过程中产生的破坏组构。为了研究自然变形的沉积物,我们从南开增生棱柱中的DSDP遗址采集了几个样品。结构组构分析包括用于测量破碎区整体和内部几何形状的光学显微镜、用于孔隙率变化的微探针研究、以及用于织物各向异性和应变的X射线极图测角。

项目成果

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Daniel Karig其他文献

Daniel Karig的其他文献

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{{ truncateString('Daniel Karig', 18)}}的其他基金

The Nature of Deformation within the Nankai Accretionary Prism Toe
南开增生棱柱趾内变形的本质
  • 批准号:
    9202784
  • 财政年份:
    1992
  • 资助金额:
    --
  • 项目类别:
    Continuing grant
In-situ Measurements in the Nankai Accretionary Prism with the Geoprops Probe
用 Geoprops 探针对南开增生棱镜进行原位测量
  • 批准号:
    8814665
  • 财政年份:
    1988
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Spreading Ridge-Trench Interaction Recorded in an Accretionary Prism: The Tertiary Shimanto Belt, SW Japan
合作研究:增生棱镜中记录的扩展山脊-海沟相互作用:日本西南部的第三纪四万十带
  • 批准号:
    8720992
  • 财政年份:
    1988
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Evolution of Modern Intra-Arc Sedimentary Basins in the Central Philippine Archipelago
菲律宾中部群岛现代弧内沉积盆地的演化
  • 批准号:
    8711382
  • 财政年份:
    1987
  • 资助金额:
    --
  • 项目类别:
    Continuing grant
Feasibility Study for the Geoprops ODP Probe: In-Situ Measurements of Physical Properties
Geoprops ODP 探针的可行性研究:物理特性的现场测量
  • 批准号:
    8715781
  • 财政年份:
    1987
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Metamorphism and Deformation Associated with Late Cenezoic Strike-Slip Faulting in the Philippines
合作研究:与菲律宾晚新生代走滑断层有关的变质作用和变形
  • 批准号:
    8707951
  • 财政年份:
    1987
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Mechanical Properties and Structural Fabric of Sediments During Dewatering and Deformation
沉积物脱水变形过程中的力学特性和结构特征
  • 批准号:
    8509003
  • 财政年份:
    1985
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Deformation Paths in an Accretion- ary Prism: Tertiary Shimanto Complex, Japan
合作研究:吸积棱镜中的变形路径:第三纪四万十杂岩,日本
  • 批准号:
    8509343
  • 财政年份:
    1985
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Structural Styles and Deformational Fabrics of Accretionary Complexes: Partial Support for a Penrose Conference
增生复合体的结构样式和变形结构:对彭罗斯会议的部分支持
  • 批准号:
    8400951
  • 财政年份:
    1984
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Acquisition of Servo-Hydraulic Load Frame and Test System
伺服液压负载框架和测试系统的购置
  • 批准号:
    8319841
  • 财政年份:
    1984
  • 资助金额:
    --
  • 项目类别:
    Standard Grant

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