The basis for the spectral behaviour of silicates in the thermal infrared and applications to remote sensingVariations in the thermal infrared (TIR) spectral response of silicate rocks is related to changes in the structures and divalent cation contents of the minerals which form the rocks. These considerations lead to a chemical parameter, SCFM, which reflects mineral structures, rock types, and their spectra. The parameter is the ratio of silica to the abundance of depolymerizing cations, defined as SCFM = SiO2/SiO2 + CaO + MgO + FeO. Parameter SCFM is therefore proposed for use in TIR remote sensing of igneous rocks. It is also demonstrated that two or three broad bands are sufficient for distinguishing among major rock types and the system noise has little effect on the quality of the results. These factors can be traded off against improved spatial resolution in instrument design.
Document ID
19890000995
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Walter, L. S. (NASA Goddard Space Flight Center Greenbelt, MD., United States)
Salisbury, J. W. (Geological Survey Reston, Va., United States)
Date Acquired
September 5, 2013
Publication Date
April 1, 1988
Publication Information
Publication: ESA, Proceedings of the 4th International Colloquium on Spectral Signatures in Remote Sensing