Application of reflectance spectroscopy (400-2500nm) as a new tool in study of environmental mineralogy (case study: Southwestern Australia)

Abstract

Acid and saline seeps are an increasing problem in most parts of the World and Australia as well. They are areas of bare soil or reduced crop production. Recent laboratory, field, and remote sensing studies have explored the use of visible to short – wave infrared (VIS- SWIR; 400-2500 nm) reflectance data for characterizing the mineralogy of mine wastes, surface mineralogy of acid-saline affected areas and for evaluating waste impacts on hydrologic and biologic systems. Seasonal surface sampling through topo-sequence of the study area and analytical results of XRD, SEM and VNIR indicate that morphological and mineralogical changes within a natural acid saline seep affected landscape revealed that seasonal differences in surface mineralogy. The visible near infra-red (VNIR) reflectance spectra of the surface minerals from unaffected, salt crusted and acid seep areas, showed spectral differences expressed in the VNIR region due to absorption bands of iron oxides and hydroxides. This difference in the surface mineralogy during summer can be readily identified via multi-spectral and hyper-spectral remote sensing methods, and therefore regional mapping com be done for identification of surface mineralogy due to spatial and temporal distribution of acid seeps, which has caused degradation of agricultural lands is suggested.

Keywords


[1] Lopez- Pamo E., Barettino D., Anton- Pacheco C., Ortiz G., Arranz J.C., Gumiel J.C., Martinez- Pledel B., Aparico M., Montouto O., "The extent of the Aznalcollar Pyretic sludge s pill and its effects on soils", The Science of the Total Environment, 242, (1999) 57-88.

[2] Swayze G.A., Smith K. M., Clark R.N., Sutley S.J., Pearson R.M., Vance J.S., Hageman P.L., Briggs P.H., Meier A.L., Singleton M.J., Roth S., "Using imaging spectroscopy to map acidic mine waste", Environmental Science and Technology. 34, (2000) 47-54.

[3] Williams D.J., Bigham J.M., Cravotta C.A. III, Traina S.J., Anderson J.E., Lyon J.G., "Assessing mine drainage pH from the color and Spectral Reflectance of chemical precipitates", Applied Geochemistry, 17, (2002) 1273-1286.

[4] Hunt G.R., Ashley R.P., "Spectra of altered rocks in the visible and near infrared", Economic Geology, 74, (1979) 1613-1629.

[5] Sherman D.M., Warte T.D., "Electronic spectra of Fe3+ oxides and oxide hydroxides in the near IR UV", American Mineralogist, 70, (1985) 1262-269.

[6] Burns R.G., "Mineralogical applicalion of crystal field theory", Cambridge University Press, Cambridge (1993).

[7] Gupta R.P., "Remote Sensing geology", Springer-Verlag. (1991) pp 356.

[8] Crowley J.K., Williams D.E., Hammastrom J.M., Piatak N. Ming Chou, I., Mars J.C., "Spectral reflectance properties (0.4-2.5 ) of secondary Fe-oxide, Fe-hydroxide, and Fe Sulphate-bearing mine wastes", Geochemistry: EXP., Env., Analy. Vol. 3 2003, pp 219-228.

[9] Cudahy T.J., Ramanaidou E., "Measurement of the hematite: goethite ratio using field visible and near-infrared reflectance Spectrometery in Channel iron deposits, Western Australia", Australian Journal of earth sciences 44, (1997) 411-420.

[10] Junfeng J., Balsam W., Chen J., Liu L., "Rapid and quantitative measurement of Hematite and Goethite in the Chinese Loess-Paleosol sequence by diffuse", Clays and Clay minerals, Vol. 50, No. 2 (2002) 208-216.

[11] Grygar T., Dedecek J., Kruiver P.P., Dekkers M.J., Bezdicka P. Schnee weiss O., "Iron oxides Mineralogy in Late Miocene red beds from La Gloria, Spain: rock magnetic, Voltammetric and Vis spectroscopy analysis", Catena (2003) 115-132.

[12] Lau I.C., Cudahy T.J., Heinson G., Mauger A. J., James P.R., "Practical Applications of hyperspectral Remote sensing in Regolith Research", In: Roach, I.C. Advances in Regolith LEME.(2003) 249-253.

[13] Fitzpatrick R.W., Fritsch E., Self P.G., "Interpretation of soil features produced by ancient and modern processes in degraded landscapes:V Development of saline sulfidic features in non-tidal seepage areas", Geoderma 69, (1996) 1-29.

[14] Fitzpatrick R.W., "Inland acid sulfate soils: A big growth area", In 5th International Acid Sulfate Soils Conference, Tweed Heads, NSW (Book of Extended Abstracts). (2002)

[15] Raghimi M., "Properties of soils affected by saline and acid seeps Westdale, Southern WA", In: Roach, I.C. CRC. LEME Australia.( 2003) 328-331,.

[16] George R.J., McFarlane D.J., Nulsen R.A., "Salinity threathens the viability of agriculture and ecosystems in Western Australia", Hydrogeology Journal, 5, (1997) 6-21.

[17] http:/www. Decagon.com/fieldspec

[18] Lewis M.F., McConnel C.E., "Observations on groundwater recharge in the Westdale catchment. Agriculture, Western Australia", Resource Management, Technical Report, (1998) 180.

[19] Bigham J.M., Fitzpatrick R.W., Schulze D., "Iron Oxides", In: J.B.Dixon and D.G. Schulze (eds). "Soil Mineralogy with Environmental Applications", Soil Science Society of America Special Publications. Madison, Wisconsin, USA. (2001) 323-366.

[20] Manceau A., Marcus M.A., Tamura N., "Quantitative speciation of heavy metals in soils and sediments by Synchrotron X-ray Techniques", In: Fenter, P.A, Rivers, M.L., Sturchio, N.C. & Sutton, S.R (eds) "Applications of synchrotron radiation in low-temperature", geochemistry and environmental science (2002) 341-4