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Laboratory technique for quantitative thermal emissivity measurements of geological samples

DSpace at IIT Bombay

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Title Laboratory technique for quantitative thermal emissivity measurements of geological samples
 
Creator MATHEW, G
NAIR, A
RAO, TKG
PANDE, K
 
Subject igneous rocks
spectroscopy
surface
spectra
mars
minerals
spectrometer
reflectance
deconvolution
scattering
emissivity
infrared spectroscopy
thermal emission
planetary geology
 
Description Thermal infrared spectroscopy is a powerful technique for the compositional analysis of geological materials. The spectral feature in the mid-IR region is diagnostic of the mineralogy and spectral signatures of mixtures of minerals that add linearly, and therefore. can be used as an important tool to determine the mineralogy of rocks in the laboratory and remotely for planetary exploration. The greatest challenge in the emission measurement lie.; in the measurement of the weak thermal photons emitted from geological materials in a. laboratory setup.. and accurately records the temperature of the rock sample. The present work pertains to the details of a new Thermal Emission Spectrometer (TES) laboratory that has been developed under the ISRO Planetary Science and Exploration (PLANEX) programme, for emission related mineralogical investigations of planetary surfaces. The focus of the paper is on the acquisition and calibration technique for obtaining emissivity, and the deconvolution procedure to obtain the modal abundances of the thermal emission spectra in the range of 6-25 mu m using Fourier Transform Infrared (FTIR) spectroscopy. The basic technique is adopted from the work of Ruff et al (1997). This laboratory at the Department of Earth Sciences. IIT-Bombay is currently developing pure end mineral library of mineral particulates (
 
Publisher INDIAN ACAD SCIENCES
 
Date 2011-08-01T22:23:08Z
2011-12-26T12:53:31Z
2011-12-27T05:39:49Z
2011-08-01T22:23:08Z
2011-12-26T12:53:31Z
2011-12-27T05:39:49Z
2009
 
Type Article
 
Identifier JOURNAL OF EARTH SYSTEM SCIENCE, 118(4), 391-404
0253-4126
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8562
http://hdl.handle.net/10054/8562
 
Language en