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Collaborative Research: Fabric and Seismic Anisotropy within the Lithospheric Mantle: Magnetic and Petrofabric Studies of Shear Zones in the New Caledonia Ophiolite

Collaborative Research: Fabric and Seismic Anisotropy within the Lithospheric Mantle: Magnetic and Petrofabric Studies of Shear Zones in the New Caledonia Ophiolite
合作研究:岩石圈地幔内的组构和地震各向异性:新喀里多尼亚蛇绿岩剪切带的磁性和岩石组构研究
批准号:
0337458
负责人:
Eric Ferre
金额:
$6.19万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2004
资助国家:
美国
项目状态:
已结题
起止时间:
2004-03-01 至 2006-02-28

项目摘要

项目成果

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中文摘要
翻译
利用电子背散射衍射和高场各向异性磁化率技术相结合的方法,研究了新喀里多尼亚鱼绿岩天然剪切带地幔橄榄岩的结构发展和各向异性。电子背散射衍射提供了晶格优选取向的精确测量,并提供了滑移系统和变形温度的信息。高磁场各向异性磁化率是一种通过隔离硅酸盐的磁贡献来提供织物主轴方向和各向异性程度的新方法。磁化率法的高场各向异性比电子后向散射衍射要快得多,因此可以以更高的分辨率绘制变形梯度。该项目正在定量地确定高磁场各向异性与矿物织物各向异性之间的相关程度,这些各向异性是利用电子背散射衍射和其他成熟的方法,如通用阶段技术确定的。如果成功,新方法将允许更快速地研究大面积的地幔结构,从而有助于解释来自地幔的地震各向异性数据。
英文摘要
The development of fabric and anisotropy in mantle peridotites in natural shear zones of the New Caledonia ophiolite is being studied using a combination of electron backscatter diffraction and high-field anisotropy of magnetic susceptibility techniques to determine lattice preferred orientation. Electron backscatter diffraction provides an accurate measurement of lattice preferred orientation and yields information on slip systems and deformation temperatures. High-field anisotropy of magnetic susceptibility is a new method that provides the orientation of the fabric main axes and the degree of anisotropy by isolating the magnetic contribution of silicates. The high-field anisotropy of magnetic susceptibility method is considerably faster than electron backscatter diffraction and, therefore, allows mapping of deformation gradients at a higher resolution. The project is quantitatively establishing the degree of correlation between high-field magnetic anisotropy and mineral fabric anisotropy determined using electron backscatter diffraction and other well-established methods such as the universal stage technique. If successful, the new method will permit more rapid study of mantle fabrics over a large area, thus aiding interpretation of seismic anisotropy data from the mantle.
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会议论文
Acquisition of a tabletop SEM/EDS system at the University of Louisiana at Lafayette
GSA Penrose Conference on Layered Mafic Intrusions an Associated Economic Deposits
Collaborative Research: Identification of magnetic sources in the upper mantle
Collaborative Research: Magma Dynamics in Sill and Dike Systems - Constraints From Magnetic Fabrics and Paleomagnetism in the Karoo Large Igneous Province
国内基金
海外基金
Research on Quantum Field Theory without a Lagrangian Description
  • 批准号:
    24ZR1403900
  • 项目类别:
    省市级项目
  • 资助金额:
    --
  • 批准年份:
    2024
  • 负责人:
    SATOSHI NAWATA
  • 依托单位:
Cell Research
Cell Research
Cell Research (细胞研究)