Calcite and dolomite discrimination using airborne SWIR imaging spectrometer data

Neil Rowlands; Robert A. Neville

doi:10.1117/12.258085

13 November 1996 Calcite and dolomite discrimination using airborne SWIR imaging spectrometer data

Neil Rowlands, Robert A. Neville

Proceedings Volume 2819, Imaging Spectrometry II; (1996) https://doi.org/10.1117/12.258085
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The SWIR full spectrum imager (SFSI) is a hyperspectral push-broom imager, acquiring imagery in 120 0.010 micrometers wide bands simultaneously covering the 1.20 micrometers to 2.47 micrometers spectral region. During the first flights of the instrument hyperspectral imagery was acquired over a calcite quarry and a dolomite quarry. Both these minerals show distinctive carbonate absorption features in the 1.7 to 2.5 micrometers region. These absorption features are centered at wavelengths approximately 0.1 micrometers shorter in dolomite than in calcite. The two minerals are clearly distinguished using a single Gaussian fit to the prominent carbonate absorption feature near approximately 2.3 micrometers in the quarry reflectance data from the SFSI test flights. The spectral resolution of the airborne spectra also allowed the 2.3 micrometers absorption feature to be resolved into tow closely spaced features. Both these absorption features show the mineralogical shift in band center. This has also been seen in laboratory spectra and a detailed comparison with this data is made.

Citation Download Citation

Neil Rowlands and Robert A. Neville "Calcite and dolomite discrimination using airborne SWIR imaging spectrometer data", Proc. SPIE 2819, Imaging Spectrometry II, (13 November 1996); https://doi.org/10.1117/12.258085

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