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首页> 外文期刊>International journal of remote sensing >Lithologic mapping in the Oscar II Coast area, Graham Land, Antarctic Peninsula using ASTER data
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Lithologic mapping in the Oscar II Coast area, Graham Land, Antarctic Peninsula using ASTER data

机译：使用ASTER数据在南极半岛格雷厄姆土地（Graham Land）的奥斯卡II海岸地区进行岩性制图

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摘要

The results of the first attempt to use Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data for the purposes of lithologic mapping on the Antarctic Peninsula are presented for an area on the Oscar II Coast, eastern Graham Land. This study included undertaking laboratory reflectance spectro-scopy of -70 rock samples from the study area and spectral lithologic analysis of two ASTER scenes. Spectra of the granitoids, silicic volcanic/volcaniclastic and terrestrial sedimentary rocks in the study area display a limited range of absorption features associated with muscovite, smectite and chlorite that are generally present as the alteration products of regional metamorphism. ASTER data analysis was undertaken using the reflective bands of the Level IB registered radiance at-sensor data and the standard thermal infrared (TIR) emissivity product (AST05). For both wavelength regions, standard qualitative image processing methods were employed to define image end-members that were used as reference within Matched Filter (MF) processing procedures. The results were interpreted with reference to existing field observations, and photogeologic analysis of the ASTER visible to near-infrared (VNIR)/shortwave infrared (SWIR) data was used to resolve ambiguities in the spectral mapping results. The results have enabled the discrimination of most of the major lithologic groups within the study area as well as delineation of hydrothermal alteration zones of propylitic, and argillic grades associated with the Mesozoic Mapple Formation volcanics. The results have extended the mapped coverage of the Mapple Formation into un-investigated regions further north and validated previously inferred geological observations concerning other rocks throughout the study area. The outcomes will enable important revisions to be made to the existing geological map of the Oscar II Coast and demonstrate that ASTER data offers potential for improving geological mapping coverage across the Antarctic Peninsula.
机译：介绍了首次使用先进的星载热发射和反射辐射计（ASTER）数据进行南极半岛岩性测绘的结果，该区域位于Graham东部的Oscar II海岸。这项研究包括对来自研究区域的-70个岩石样品进行实验室反射光谱分析，以及对两个ASTER场景的光谱岩性分析。研究区的花岗岩，硅质火山岩/火山碎屑岩和陆相沉积岩的光谱显示出与白云母，蒙脱石和绿泥石有关的吸收特征范围有限，这些特征通常作为区域变质作用的变化产物而存在。使用IB级注册的传感器辐射数据的反射带和标准热红外（TIR）发射率乘积（AST05）进行ASTER数据分析。对于两个波长区域，采用标准的定性图像处理方法来定义图像末端成员，这些末端成员在“匹配滤镜”（MF）处理程序中用作参考。参考现有的现场观测结果解释了结果，并对可见到近红外（VNIR）/短波红外（SWIR）数据的ASTER进行了光地质分析，以解决光谱图结果中的歧义。结果使得能够区分研究区域内的大多数主要岩性组，并勾勒出与中生代马普组火山岩有关的丙炔质热液蚀变带和泥质等级。结果已经将马普组的测绘覆盖范围扩展到了更北的未调查区域，并验证了先前推断的有关整个研究区域其他岩石的地质观测结果。结果将使对现有的Oscar II海岸地质图进行重要修订，并证明ASTER数据为改善整个南极半岛的地质图覆盖率提供了潜力。

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  • 来源
    《International journal of remote sensing》 |2011年第8期|p.2013-2035|共23页
  • 作者

    C. E. HASELWIMMER; T. R. RILEY; J. G. LIU;

  • 作者单位

    British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, UK;

    Department of Earth Science and Engineering, South Kensington Campus, Imperial College London, SW7 2AZ, UK;

    Geophysical Institute,University of Alaska Fairbanks, 903 Koyukuk Drive, PO Box 757320, Fairbanks, AK 99775-7320, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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