Assessing the potential of multispectral remote sensing for lithological mapping on the Antarctic Peninsula: case study from eastern Adelaide Island, Graham Land
Assessing the potential of multispectral remote sensing for lithological mapping on the Antarctic Peninsula: case study from eastern Adelaide Island, Graham Land
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DOI：
10.1017/s0954102010000015
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发表时间：
2010-02
影响因子：
1.6
通讯作者：
C. Haselwimmer;T. Riley;Jianguo Liu
中科院分区：
文献类型：
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作者：
C. Haselwimmer;T. Riley;Jianguo Liu
摘要利用先进的星载热发射和反射辐射计（ASTER）数据对南极半岛阿德莱德岛的赖特半岛地区进行岩性填图，并与现有的地质图和最近的野外观测结果进行比较，以评估多光谱遥感在南极半岛进行岩性填图的潜力。赖特半岛包括从花岗岩到辉长岩的钙碱性侵入岩、酸性到中等成分的火山岩和与弧有关的沉积物。参照研究区域岩石样品的反射光谱，分析了单一ASTER图像的反射和热波段。利用新近编制的阿德莱德岛地质图和在最近的实地工作中进行的观测，对高级星载热辐射计制图结果进行了评估。结果表明，ASTER可以唯一区分花岗岩类侵入岩和蚀变流纹质火山岩，显示出独特的光谱特性。由于光谱性质的相似性，在区分更多的中间/基性岩，如辉长岩/辉长岩，安山岩/玄武岩和含绿泥石沉积物时，结果更加模糊。这些结果表明，虽然ASTER数据的能力是有限的，独特的区分岩性，他们可以提供重要的岩性信息，支持南极半岛的地质制图。
Abstract The results of lithological mapping using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data for the Wright Peninsula region of Adelaide Island, Antarctic Peninsula are compared with existing geological maps and recent field observations to assess the potential of multispectral remote sensing to undertake lithological mapping on the Antarctic Peninsula. The Wright Peninsula comprises calc-alkaline intrusive rocks ranging from granite to gabbro, volcanic rocks of acidic to intermediate composition, and arc-related sediments. The reflective and thermal bands of a single ASTER image were analysed with reference to reflectance spectra of rock samples from the study area. Assessment of the ASTER mapping outcomes was undertaken with a newly compiled geological map of Adelaide Island and observations made during recent fieldwork. The results demonstrate that ASTER can uniquely discriminate granitoid intrusive rocks and altered rhyolitic volcanic rocks that display distinctive spectral properties. The results are more ambiguous at discriminating more intermediate/mafic rocks such as diorite/gabbro, andesite/basalt and chlorite-bearing sediments due to the similarity in spectral properties. These results demonstrate that although ASTER data are limited in their ability to uniquely discriminate lithologies they can provide important lithological information in support of geological mapping on the Antarctic Peninsula.