Application of attenuated total reflectance Fourier transform infrared spectroscopy in the mineralogical study of a landslide area, Hungary

Abstract

a b s t r a c t a r t i c l e i n f oThis study demonstrates that the unpolarized attenuated total reflectance Fourier transform infrared spectroscopy (ATR FTIR) is a practical and quick tool to distinguish different types of sediments in landslide-affected areas, and potentially other types of physical environments too. Identification and quantification of minerals by ATR FTIR is implemented on a set of powdered natural sediments from a loess landslide (Kulcs, Hungary). A protocol including sample preparation, analytical conditions and evaluation of sediment ATR spectra is outlined in order to identify and estimate major minerals in sediments. The comparison of the defined FTIR parameters against qualitative and quantitative results of X-ray diffraction and thermal analysis was used to validate the use of ATR FTIR spectroscopy for the considered sediments. The infrared band areas and their ratios (water/carbonates; silicates/carbonates; kaolinite) appear to be the most sensitive parameters to identify strongly weathered sediments such as paleosols and red clays which most likely facilitate sliding and could form sliding zones. The effect of grain size and orientation of anisotropic minerals on the wave number and intensity of some major absorption bands is also discussed.

Infrared spectroscopy methods in reservoir rocks analysis – semiquantitative approach for carbonate rocks

“…During quantitative analysis of rock mineral composition, for each new series of samples it is recommended to calibrate the method on standards (samples of known or determined by XRD/SEM-XRF (like QuemScan) composition) [16,29,28], also PCR, PLS or NNLS statistical data analyses processes should be utilized [19,20,30].…”

Chemical and Spectroscopic Investigation of Different Soil Fractions as Affected by Soil Management

“…Additionally, in this case, this peak can be highlighted by removing minerals through HF treatment [43]. The peak at about 2517 cm −1 can be attributed to the CO 3 stretching and calcite bending, as indicated by peaks at about 1450, 867, and 698 cm −1 [15,44]. These peaks, especially those at 1450 and 867 cm −1 , were more pronounced in the spectrum of the A fraction.…”

“…High percentage of calcite in the sand-sized fraction of a Mediterranean soil was also found in a previous work [3] and was ascribed to its lithogenic origin. The peaks at about 1991, 1868, 1793, and 698 cm −1 were related to Si-O bending of quartz minerals [15,43,44] as well as the peaks at about 791 cm −1 related to the Si-O stretching of quartz minerals [15,43]. Overall, these peaks were slightly more pronounced in all fractions B and C possibly because of the physical breakup of sand size quartz into silt dimension.…”

“…In order to identify the minerals and their changes among the different soil fractions, the diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy has been utilized. This technique can be considered rapid, inexpensive, and precise, and can be applied to estimate the water-bearing minerals, such as clay minerals together to other sheet silicates as muscovite, illite, smectite, kaolinite, and chlorite [15], and the presence of organic matter [16]. DRIFT spectroscopy allows us to analyze the matrices without pressing them by avoiding the error due to scattering [17], and to have a band intensity four times greater than that of IR spectroscopy due to the non-mixing of the soil sample with KBr [18].…”

Reservoir descriptions of the Kömürlü and Penek Formations near Erzurum, East Anatolia, Turkey

“…The ATR technique was selected to combat significant problems Aksu (1988) and Şahintürk (1992)]. b Core log of the study well in the Aşkale sub-basin of infrared analyses, such as sample preparation and spectral reproducibility (Adamu 2010;Udvardi et al 2014).…”