共查询到19条相似文献，搜索用时 78 毫秒
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以矿区塌陷区及周边地物为研究对象,采集其主要类型地物的波谱信息,并分析各类地物的波谱特征,寻找地物波谱变化与地物距煤矿距离之间的联系;采用光谱特征变异法对研究区域进行变化图斑检测,分析了研究区2003-2011年间塌陷区主要地物类型的变化情况. 相似文献
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《国土资源遥感》2016,(4)
为了进一步探讨岩性信息增强方法在岩性遥感解译中的应用效果,选择内蒙古索伦山扎嘎乌苏地区进行岩性遥感信息增强方法研究。针对因异物同谱、同物异谱及表层浅覆盖等因素导致的岩石影像特征复杂、色彩反差较弱及细节信息不够丰富等一系列问题,对研究区岩石波谱曲线特征、WorldView2数据光谱特征及空间特征进行了综合分析。在对WorldView2数据进行几何纠正和图像融合等预处理的基础上,应用基于光谱特征和空间特征的一系列有效的岩性信息增强方法,对研究区进行岩性解译。将解译结果与研究区1:50 000比例尺地质图对比,划分出了更多的岩性种类,提高了岩性解译的精度,为更加精确的岩性识别提供了依据。 相似文献
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TerraSpec波谱仪在西藏多不杂斑岩铜矿区蚀变信息研究中的应用 总被引：1，自引：0，他引：1
西藏改则县多不杂矿区为近年来在班公湖—怒江成矿带发现的大型斑岩铜矿区,对这一典型矿床的研究有助于对整个班公湖—怒江成矿带提出更好的找矿认识.使用美国TerraSpec便携式地物波谱仪对从多不杂矿区采集的地物样品进行波谱测试及镜下鉴定,确定矿区主要蚀变为绢英岩化及绿帘石化,地表矿化主要有褐铁矿化、孔雀石化和蓝铜矿化.矿区出露的2套花岗闪长斑岩的波谱特征存在明显差异,成矿斑岩绢英岩化蚀变较为严重;而不成矿斑岩基本无蚀变,主要零星分布在成矿斑岩的外围.对采样样品实测波谱特征与其在ASTER图像上的波谱特征的对比分析表明,两者具有良好的一致性.最后基于采样样品波谱特征,圈定了与成矿相关的绢英岩化区域,并建议绢英岩化区域为今后矿产勘察重点区域. 相似文献
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本文介绍一种根据蚀变粘土矿物的近红外及短波红外反射波谱的特征吸收峰识别粘土矿物的方法。该方法的原理是根据不同蚀变粘土矿物的近红外、短波红外反射波谱均存在一些特征吸收峰,而且不同粘土矿物,其吸收峰个数、波长位置及吸收强度不同。首先用IRIS红外智能波谱仪对样品进行测试,然后,将测得的样品的近红外、短波红外反射波谱吸收峰波长和吸收强度进行数字编码,再用此编码与存贮于数据库中的标准蚀变粘土矿物的近红外-短波红外反射波谱吸收峰波长和吸收强度编码进行对比,来进行矿物识别。该方法主要包括①求外壳曲线(包络曲线);②求外壳系数；③求吸收峰极小值及波长位置；④对吸收峰波长及吸收强度进行编码；⑤与标准蚀变粘土矿物吸收峰波长和吸收强度编码进行对比来识别粘土矿物等5个步骤。 相似文献
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Hyperspectral remote sensing technique is widely applied for geological studies including the study of extra-terrestrial rocks.
Since it has many spectral bands, discrimination between rocks and minerals can be done more precisely. To perform chemical
and mineralogical mapping and to study the rocks on the lunar surface, India has proposed to launch its first lunar remote
sensing satellite Chandrayaan-1 in the year 2008. For mineralogical mapping, the mission will carry a Hyperspectral Imager
(HySI) instrument, which operates in the VNIR region. This paper presents-an attempt to study the spectral response of lunar-akin
terrestrial rocks, in the VNIR region (as in the case of the proposed HySI on-board Chandrayaan-1). For this purpose, rocks
similar to those present on the lunar surface were collected and their spectral response in the 64 simulated bands of HySI
sensor were studied using a spectro-radiometer. Petrographic studies and modal analysis were carried out using thin sections
of the rock samples. On studying the spectral response of the lunar-like rock samples in the 64 HySI bands, it is seen that
there are distinct absorption features in bands 58 (923.75nm-927.5nm) and 63 (942.5nm-946.25nm) of the NIR wavelength ranges,
for basalt rocks; distinct reflectance features in band 20 (590nm to 600nm) for ganmbbro: distinct reflectance features in
band 19 (580nm to 590nm) and absorption in band 18 (570-580nm) for gabbroic anorthosite and distinct reflection features in
band 63 (942.5nm to 946.25nm) for anorthosite. Thus, this study demonstrates the possibility of identifying the minerals and
rocks on lunar surface using the hyperspectral approach and the spectral signatures of lunar-like rocks present on Earth. 相似文献
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《Geoscience and Remote Sensing Letters, IEEE》2009,6(1):52-56
An hyperspectral imaging spectrometer measuring in the longwave thermal infrared (7.6-11.6 mum), with a spatial resolution less than 5 mm at a range of 10 m, was used in the field to observe the variability of emissivity spectra of individual rock surfaces. The rocks were obtained commercially, were on the order of 20 cm in size, and were selected to have distinct spectral features: they include alabaster (gypsum), soapstone (steatite with talc), obsidian (volcanic glass), norite (plagioclase and orthopyroxene), and ldquojasperrdquo (silica with iron oxides). The advantages of using an imaging spectrometer to characterize these rocks spectrally are apparent. Large spectral variations were observed within individual rocks that may be attributed to roughness, surface geometry, and compositional variation. Nonimaging spectrometers would normally miss these variations as would small samples used in laboratory measurements, spatially averaged spectra can miss the optimum spectra for identification of materials, and spatially localized components of the rock can be obscured. 相似文献
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本文运用ASTER遥感数据识别与提取新疆南天山铜花山地区蛇绿混杂岩带岩性信息。首先,利用比值法快速区别岩性,并比较了识别同一种岩性的不同指数的性能;然后,将对数残差算法应用在ASTER数据的短波红外波段上,在区域尺度上把蛇绿岩杂岩体同围岩区分开来;最后,运用标准光谱数据和光谱角填图法识别出多种蛇绿岩成分及其空间分布。现有地质图和野外验证反映出该方法有一定效果。利用混淆矩阵对光谱角填图法分类结果定量评价,结果表明,把ASTER的可见光-近红外、短波红外波段数据结合在一起进行岩性分类,可以达到比单独用短波红外数据分类更高的分类精度。 相似文献
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S. Anbazhagan N. K. Sainaba S. Arivazhagan 《Journal of the Indian Society of Remote Sensing》2012,40(1):145-153
In the present study, The Landsat 7 ETM satellite data was collected for the Sittampundi anorthosites complex and digital
image analysis was carried out. The anorthositic rocks available at Sittampundi complex is considered as an equivalent of
lunar highland rocks. Hence, a remote sensing study comprises of image analysis and spectral profile analysis was carried
out. The satellite data was digitally processed and generated various outputs like band combinations, color composites, stretched
outputs, and PCA. The suitable processed outputs were identified for delineating the anorthosite complex. The diagnostic absorption
features of reflectance spectra are the sensitive indicators of mineralogy and chemical composition of rocks, which are interest
to the planetary scientists. The spectral profile of Landsat ETM plotted for pure and mixed anorthosite pixels and compared
with the field and lab reflectance spectra. The percentages of image spectra vary from 30% to 60% for Sittampundi anorthosite.
The spectral bands 2, 4 and 6 have low reflectance and bands 3 and 5 have high reflectance. The spectral range of bands 2,3,4,5
and 6 are 525 nm–605 nm, 630 nm–690 nm, 750 nm–900 nm, 1550 nm–1750 nm and 10400 nm–12500 nm respectively. The field spectral
curve has weak absorptions at 650 nm and 1000 nm due to the iron transition absorption and low ca- pyroxene respectively available
in the anorthosite, matching with the image spectra. However, hyperspectal image with narrow bandwidth could be more useful
in selecting the suitable spectrum for remotely mapping the anorthosite region, as equivalent test site for lunar highland
region. 相似文献