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首页> 外文学位 >An analysis of the mechanical behaviour of tectonically active icy satellite lithospheres through geological mapping, geomorphic analysis, and geophysical modeling.
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An analysis of the mechanical behaviour of tectonically active icy satellite lithospheres through geological mapping, geomorphic analysis, and geophysical modeling.

机译：通过地质制图，地貌分析和地球物理模型分析构造活动的冰卫星岩石圈的力学行为。

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摘要

The research that has culminated in this thesis is an attempt to gain insight into a broad question. How do the lithospheres of tectonically active icy satellites behave? To accomplish this, geological mapping, geomorphic analysis, and geophysical modeling are used to explore the mechanical behavior of the lithospheres of the icy satellites Ganymede and Europa. For Ganymede, insights gained from the production of a global geologic map of the surface suggest that the lithosphere of this icy body has thickened with time and that the morphologies of possible plate boundaries suggest that the lithosphere responded nonrigidly to plate rotations. For Europa, geomorphic analysis of discontinuities associated with long linear structural features on the surface are used to suggest that the mechanical behavior of the lithosphere can be analogous to thin oceanic lithosphere on Earth. The kinematic analysis of triple junctions on Europa is used to suggest that plates on the icy satellite deform rigidly in an extensional environment. Geophysical modeling of plate motions on the surface of Europa are used to show that nonrigid plate deformation can occur in an extensional or compression environment. Finally, evidence is also found within these analyses supporting a formation mechanism for complex ridges on Europa involving the successive build-up of ridges over time and indicating that plate boundary reorganization might be an important factor affecting the evolution of long-lived features on Europa.
机译：在本论文中达到最高水平的研究是试图深入了解一个广泛的问题。构造活跃的冰冷卫星的岩石圈表现如何？为了实现这一目标，使用了地质制图，地貌分析和地球物理模型来探索冰冷卫星Ganymede和Europa岩石圈的力学行为。对于木卫三，从全球表面地质图的制作中获得的见解表明，该冰体的岩石圈随时间而增厚，可能的板块边界形态表明，岩石圈对板块旋转的响应非刚性。对于欧罗巴，与地表上的长线性结构特征相关的不连续性的地貌分析被用来表明岩石圈的力学行为可以类似于地球上的薄海洋岩石圈。欧罗巴上三重连接的运动学分析表明，冰星上的板块在伸展环境中会发生刚性变形。欧罗巴表面上板块运动的地球物理模型用于显示非刚性板块变形可以在拉伸或压缩环境中发生。最后，在这些分析中还发现了证据，支持欧罗巴上复杂脊的形成机制，其中包括随着时间的推移连续形成的脊，并表明板块边界重组可能是影响欧罗巴上长寿命特征演化的重要因素。

著录项

  • 作者

    Patterson, Gerald Wesley.;

  • 作者单位

    Brown University.;

  • 授予单位 Brown University.;
  • 学科 Geology.; Geophysics.; Physics Astronomy and Astrophysics.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 263 p.
  • 总页数 263
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;地球物理学;天文学;
  • 关键词

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