Mapping the distribution of weathered Pleistocene wadi deposits in Southern Jordan using ASTER, SPOT-5 data and laboratory spectroscopic analysis
Mapping the distribution of weathered Pleistocene wadi deposits in Southern Jordan using ASTER, SPOT-5 data and laboratory spectroscopic analysis
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DOI：
10.1016/j.catena.2013.02.003
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发表时间：
2013-08
期刊：
影响因子：
6.2
通讯作者：
Rene Löhrer;M. Bertrams;E. Eckmeier;J. Protze;F. Lehmkuhl
中科院分区：
文献类型：
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作者：
Rene Löhrer;M. Bertrams;E. Eckmeier;J. Protze;F. Lehmkuhl
在黎凡特的干旱地区，古瓦迪填充物充当着陆地沉积档案的角色，具有保存考古发现的高潜力。这项目前的研究将遥感和实验室可见光光谱相结合，以调查约旦南部一个小集水区冲积洼地填充物的空间分布。由于砂岩地质均匀，冲积沉积物的成分受当地基岩的影响很大，而河流迁移和地表风化作用引发了主要铁氧化物(Fe3+)的次生蚀变。沉积物矿物成分的差异使得能够使用ASTER和SPOT-5卫星图像的不同光谱组合通过遥感探测和绘制瓦迪矿床的地图。此外，对研究区选定的地表样品和土壤切片进行了反射光谱的实验室测量，以验证从遥感获得的信息，并量化地表风化和成土过程的程度。结果表明，赤铁矿向针铁矿的初始转化是与研究区近期干旱条件有关的主导过程。此外，使用遥感技术预测潜在的新考古发现区域是可能的。
In the arid regions of the Levant, ancient wadi fills act as a terrestrial sedimentary archive with a high potential for preserving archaeological findings. This current study combines remote sensing with laboratory VIS-spectroscopy to investigate the spatial distribution of alluvial wadi fills in a small catchment in Southern Jordan. Due to its homogeneous sandstone geology, the composition of the alluvial sediments is highly influenced by the local bedrock whilst fluvial relocation and surface weathering processes initiated a secondary alteration of dominant iron oxides (Fe3+). The differences in mineralogical composition of the sediments enable the detection and mapping of wadi deposits by remote sensing using different spectral combinations of ASTER and SPOT-5 satellite images. Additionally, laboratory measurements of reflectance spectra were applied on selected surface samples and soil sections from the study area in order to verify the information derived from remote sensing and to quantify the degree of surface weathering and pedogenic processes. The results show that an initial transformation from hematite to goethite is the dominant process related to the recent arid conditions in the study area. Furthermore, it is possible to predict potential new archaeological finding areas using remote sensing techniques.