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首页> 外文学位 >The potential of airborne synthetic aperture radar (SAR) imagery as a basic tool for stratigraphic investigations in forested areas: The Ordovician-Silurian carbonate succession of Anticosti Island, Gulf of St. Lawrence, eastern Canada (Quebec).
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The potential of airborne synthetic aperture radar (SAR) imagery as a basic tool for stratigraphic investigations in forested areas: The Ordovician-Silurian carbonate succession of Anticosti Island, Gulf of St. Lawrence, eastern Canada (Quebec).

机译：机载合成孔径雷达（SAR）影像作为森林地区地层调查的基本工具的潜力：加拿大东部（魁北克）圣劳伦斯湾安蒂科斯蒂岛的奥陶纪-lur柳碳酸盐岩演替。

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摘要

Anticosti Island, located in the Gulf of St. Lawrence in eastern Canada, is one of the few places in the world where the Ordovician/Silurian boundary is well preserved and exposed. Its relatively undeformed shallow-water carbonate sequence of approximately 900 m in thickness is rich in fossils and is known to contain traces of hydrocarbons. The island has been for decades the subject of several geological studies, but its stratigraphic succession was never successfully mapped precisely because of its dense forest cover present over almost 95% of its vast territory.; This study provides new mapping tools and techniques to support the geological representation of the island stratigraphic succession. Airborne SAR (Synthetic Aperture Radar) data acquired with the active radar system onboard of the former CCRS (Canada Centre for Remote Sensing) Convair-580 aircraft, in single and fully polarimetric modes and with different viewing geometry, were qualitatively and quantitatively evaluated by means of image interpretation and polarimetric analysis for their mapping potential over the densely forested study area.; The airborne SAR data, supported with ancillary geoscience data sets and derivative topographic related products, have resulted in the availability of valuable and accurate terrain information such as topographic variations associated with the gently inclined recessive and resistant strata of the island succession. It also provided with information on the polarimetric scattering mechanism of the vegetation cover overlying the surface deposits and bedrock geology, suggesting a possible preferential distribution.; With almost 50% of the Canadian territory covered by forest, radar remote sensing, as demonstrated by this study, is a cost-effective tool to produce more accurate regional structural and geological map in areas where traditional mapping campaigns failed due to the presence of an extensive vegetation cover.
机译：Anticosti岛位于加拿大东部的圣劳伦斯湾，是世界上为数不多的保存和暴露奥陶纪/西律纪边界的地方之一。其厚度约为900 m的相对未变形的浅水碳酸盐岩层富含化石，已知含有痕量的碳氢化合物。几十年来，该岛一直是几项地质研究的主题，但是由于其茂密的森林覆盖了近95％的广阔领土，其地层演替从未成功地绘制过。这项研究提供了新的测绘工具和技术，以支持岛屿地层演替的地质表征。对前CCRS（加拿大遥感中心）Convair-580飞机机载有源雷达系统采集的机载SAR（合成孔径雷达）数据进行了定性和定量评估，方法是单极化和全极化模式，并具有不同的观察几何形状。在茂密的研究区域内图像解释和极化分析的映射潜力的研究；机载SAR数据，辅以辅助地球科学数据集和与地形相关的衍生产品，已经获得了宝贵而准确的地形信息，例如与岛屿演替的平缓倾斜的隐性和抗性地层相关的地形变化。它还提供了关于覆盖在表层沉积物和基岩地质上的植被覆盖层的偏振散射机制的信息，表明可能存在优先分布。这项研究表明，加拿大几乎有50％的森林被森林覆盖，雷达遥感是一种经济有效的工具，可以在由于传统制图活动而导致失败的地区绘制更准确的区域结构和地质图。广泛的植被覆盖。

著录项

  • 作者

    Gauthier, Eric L.;

  • 作者单位

    University of Ottawa (Canada).;

  • 授予单位 University of Ottawa (Canada).;
  • 学科 Geology.; Remote Sensing.
  • 学位 M.Sc.
  • 年度 2003
  • 页码 141 p.
  • 总页数 141
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;遥感技术;
  • 关键词

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