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Spectral Properties of Salt Crusts Formed on Saline Soils

F. M. Howari*,a, P. C. Goodellb and S. Miyamotoc

a University of Texas at El Paso, Center for Environmental Resource Management, PMB 113, El Paso, TX 79968
b University of Texas at El Paso, Dep. of Geological Sci., El Paso, TX 79968
c Texas A&M Agricultural Research Center at El Paso, 1380 A&M Circle, El Paso, TX 79907



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  		Fig. 1. Spectra of gypsum (CaSO4·2H2O), halite (NaCl), calcite (CaCO3), nahcolite (NaHCO3), and thendarite (Na2SO4) (from Howari et al., 2000b).

 


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  		Fig. 2. Selected micrographs of the examined salt crusts.

 


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  		Fig. 3. Spectra of (a) Harkey and (b) Vinton soils treated with different concentrations of Na2SO4.

 


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  		Fig. 4. Spectra of the salt crust formed on the surfaces of (a) Harkey and (b) Vinton soils.

 


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  		Fig. 5. Spectra of (a) Harkey and (b) Vinton soils treated with NaCl, CaSO4·2H2O, and their mixtures.

 


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  		Fig. 6. Spectra of (a) Harkey and (b) Vinton soils treated with Na2SO4, CaSO4·2H2O, and their mixtures.

 


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  		Fig. 7. Spectra of (a) Harkey and (b) Vinton soils treated with NaHCO3, CaCO3, and their mixtures.

 




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