Alteration mineral mapping in inaccessible regions using target detection algorithms to ASTER data

2017 International Conference on Space Science and Communication

物理学;无线电电子学

Pour, A.B.^1,2 ; Hashim, M.^1 ; Park, Y.^2

Geoscience and Digital Earth Centre (Geo-DEC), Research Institute for Sustainability and Environment (RISE), Universiti Teknologi Malaysia (UTM), Malaysia^1

Korea Polar Research Institute (KOPRI), Songdomirae-ro, Yeonsu-gu, Incheon

21990, Korea, Republic of^2

关键词: Adaptive coherence estimator;    Advanced spaceborne thermal emission and reflection radiometer;    Constrained Energy Minimization;    Geological information;    Image processing algorithm;    Orthogonal subspace projection;    Remotely sensed images;    Target detection algorithm;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/852/1/012022/pdf
DOI  :  10.1088/1742-6596/852/1/012022

来源: IOP

【 摘 要 】

In this study, the applications of target detection algorithms such as Constrained Energy Minimization (CEM), Orthogonal Subspace Projection (OSP) and Adaptive Coherence Estimator (ACE) to shortwave infrared bands of the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data was investigated to extract geological information for alteration mineral mapping in poorly exposed lithologies in inaccessible domains. The Oscar II coast area north-eastern Graham Land, Antarctic Peninsula (AP) was selected in this study to conduct a satellite-based remote sensing mapping technique. It is an inaccessible region due to the remoteness of many rock exposures and the necessity to travel over sever mountainous and glacier-cover terrains for geological field mapping and sample collection. Fractional abundance of alteration minerals such as muscovite, kaolinite, illite, montmorillonite, epidote, chlorite and biotite were identified in alteration zones using CEM, OSP and ACE algorithms in poorly mapped and unmapped zones at district scale for the Oscar II coast area. The results of this investigation demonstrated the applicability of ASTER shortwave infrared spectral data for lithological and alteration mineral mapping in poorly exposed lithologies and inaccessible regions, particularly using the image processing algorithms that are capable to detect sub-pixel targets in the remotely sensed images, where no prior information is available.