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Planetary morphology study of landforms in Gorgonum and Atlantis basins, Mars.

机译:火星Gorgonum和Atlantis盆地地貌的行星形态学研究。

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摘要

In this thesis, the evolution of landforms in Gorgonum and Atlantis basins on Mars is investigated using the geomorphologic approach of landform identification and mapping, and a new dating method (chronologic surface method). Correlations among processes and mechanisms of control that formed the hierarchically structured landforms are analyzed and used to define the evolution of surface morphologies. High-resolution satellite images and a digital elevation model (DEM) are used to describe associations of depositional and erosional structures at a regional scale. Morphometric assemblages of landforms are mapped using local relief as a principal variable and DEM analysis in a GIS environment as the principal tool. Ages of different landforms are investigated using craters' morphometrical characteristics referring to their depth, diameter and the area extent within the landforms on which they are superposed.;Three stages of evolution are described for Gorgonum and Atlantis basins, corresponding to the action of major controlling processes and mechanisms at a planetary scale: major impact cratering (3.48+/-0.163 Gy ago), volcanism and associated tectonism in Tharsis that flexed and fractured the Martian lithosphere toward its periphery (1.21+/-0.056--1.05+/-0.049 Gy ago), and climate change that characterizes the present dry and cold Mars (347-336+/-15 My ago). An intense epoch of fluvial and lacustrine resurfacing took place 714+/-33--607+/-12 My ago which corresponds to the ages derived for the hydrated mineral iddingsite (679+/-66 My ago) in Martian meteorites.;Key words. Mars, landform hierarchy, regional scale analysis, morphologic mapping, chronologic surface method, age determination, Martian meteorite age constraints.
机译:本文利用地貌识别和制图的地貌方法,以及一种新的年代学方法(年代学地表方法),研究了火星戈尔贡纳姆和亚特兰提斯盆地地貌的演变。分析形成分层结构的地形的过程和控制机制之间的相关性,并将其用于定义表面形态的演变。高分辨率卫星图像和数字高程模型(DEM)用于描述区域规模的沉积和侵蚀结构的关联。使用局部地形作为主要变量并在GIS环境中使用DEM分析作为主要工具来绘制地形形态组合图。利用火山口的形态,形态特征,结合火山口的深度,直径和面积范围,研究了不同地貌的年龄。;高尔贡盆地和亚特兰提斯盆地描述了三个演化阶段,对应于主要控制作用行星尺度的过程和机制:主要的撞击坑(3.48 +/- 0.163 Gy以前),塔里西斯的火山作用和相关的构造运动使火星岩石圈向其外围弯曲和破裂(1.21 +/- 0.056--1.05 +/- 0.049 Gy之前)和气候变化,这是目前干燥和寒冷的火星的特征(347-336 +/- 15 My ago)。河流和湖床重铺的强烈时代发生在714 +/- 33--607 +/- 12 My ago,这对应于火星陨石中水合矿物立陶地点的年龄(679 +/- 66 My ago)。话。火星,地貌层次结构,区域尺度分析,形态映射,年代学地表方法,年龄确定,火星陨石年龄约束。

著录项

  • 作者

    Capitan, Radu-Dan.;

  • 作者单位

    The University of Western Ontario (Canada).;

  • 授予单位 The University of Western Ontario (Canada).;
  • 学科 Physical Geography.;Physics Astronomy and Astrophysics.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 221 p.
  • 总页数 221
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然地理学;天文学;
  • 关键词

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