Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/15986
Title: Using ASTER TIR radiance and surface emissivity data to map lithology and silica abundance in a metamorphic terrain
Authors: Misra A.
Gupta R.P.
Sen A.K.
Published in: Proceedings of International Geoscience and Remote Sensing Symposium (IGARSS)
Abstract: Most of the important rock forming silicate minerals have their diagnostic spectral features in the thermal infrared (TIR, 8-14 μm) wavelength region. The variation in silicate mineralogy from felsic to mafic is represented as a shift of the main spectral feature (reststrahlen band) towards longer wavelengths. This characteristic is utilized in mapping silicate mineralogy using multispectral TIR data. We use some lithologie indices on ASTER TIR data (LIB and L2) of a metamorphic terrain in NW India to map surface lithologies. The test area represents metamorphosed rocks with almost pure silicates (quartzites) on one end, and impure carbonates and mafic rocks (amphibolites) on the other. The results demonstrate that atmospherically corrected surface radiance data lead to an overall improvement in remote lithology mapping. Surface emissivity data derived using temperature and emissivity separation (TES) algorithm are used to generate a silica abundance map of the study area in conjunction with an empirical model. Field and laboratory analyses of select rock samples collected from the study area are used to validate remote silica abundance estimates. © 2007 IEEE.
Citation: Proceedings of International Geoscience and Remote Sensing Symposium (IGARSS), (2007), 1640- 1643. Barcelona
URI: https://doi.org/10.1109/IGARSS.2007.4423129
http://repository.iitr.ac.in/handle/123456789/15986
Issue Date: 2007
Keywords: ASTER TIR radiance-at-sensor
Lithologie mapping
Metamorphic terrain
Silica abundance
Surface emissivity
Surface radiance
ISBN: 1424412129; 9781424412129
Author Scopus IDs: 23492953700
55705309300
7401592446
Author Affiliations: Misra, A., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Gupta, R.P., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Sen, A.K., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Corresponding Author: Misra, A.; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India; email: ashish.misra80@gmail.com
Appears in Collections:Conference Publications [ES]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.