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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Analysis of hot springs and associated deposits in Yellowstone National Park using ASTER and AVIRIS remote sensing
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Analysis of hot springs and associated deposits in Yellowstone National Park using ASTER and AVIRIS remote sensing

机译：黄石国家公园的温泉及相关沉积物的ASTER和AVIRIS遥感分析

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摘要

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and the Airborne Visible/IR Image Spectrometer (AVIRIS) data were used to characterize hot spring deposits in the Lower, Midway, and Upper Geyser Basins of Yellowstone National Park from the visibleear infrared (VNIR) to thermal infrared (TIR) wavelengths. Field observations of these basins provided the critical ground-truth for comparison with the remote sensing results. Fourteen study sites were selected based on diversity in size, deposit type, and thermal activity. Field work included detailed site surveys such as land cover analysis, photography, Global Positioning System (GPS) data collection, radiometric analysis, and VNIR spectroscopy. Samples of hot spring deposits, geyser deposits, and soil were also collected. Analysis of ASTER data provided broad scale characteristics of the hot springs and their deposits, including the identification of thermal anomalies. AVIRIS high spectral resolution short-wave infrared (SWIR) spectroscopy provided the ability to detect hydrothermally altered minerals as well as a calibration for the multispectral SWIR ASTER data. From the image analysis, differences in these basins were identified including the extent of thermal alteration, the location and abundance of alteration minerals, and a comparison of active, near-extinct, and extinct geysers. We determined the activity level of each region using a combination of the VNIR-SWIR-TIR spectral differences as well as the presence of elevated temperatures, detected by the TIR subsystem of ASTER. The results of this study are applicable to the exploration of extinct mineralized hydrothermal deposits on both Earth and Mars.
机译：先进的星载热发射和反射辐射仪（ASTER）和机载可见/红外图像光谱仪（AVIRIS）数据用于从可见/近红外特征描述黄石国家公园下，中途和上间歇泉盆地的温泉沉积物（VNIR）到热红外（TIR）波长。这些盆地的实地观察为与遥感结果进行比较提供了关键的地面真相。根据大小，沉积物类型和热活动的多样性选择了14个研究地点。现场工作包括详细的现场调查，例如土地覆盖分析，摄影，全球定位系统（GPS）数据收集，辐射分析和VNIR光谱。还收集了温泉沉积物，间歇泉沉积物和土壤的样品。对ASTER数据的分析提供了温泉及其沉积物的广泛尺度特征，包括热异常的识别。 AVIRIS高光谱分辨率短波红外（SWIR）光谱仪能够检测水热改变的矿物，并能够对多光谱SWIR ASTER数据进行校准。从图像分析中，可以识别出这些盆地的差异，包括热蚀变的程度，蚀变矿物的位置和丰富程度，以及活跃，接近灭绝和灭绝的间歇泉的比较。我们使用VNIR-SWIR-TIR光谱差异以及ASTER的TIR子系统检测到的高温存在的组合来确定每个区域的活性水平。这项研究的结果适用于探索地球和火星上已灭绝的矿化热液矿床。

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