Mineralogical study of kaolinitic clays from Sidi El Bader in the far north of Tunisia

Felhi, Mongi; Tlili, Ali; Gaied, Mohamed Essghaïer; Montacer, Mabrouk

doi:10.1016/j.clay.2007.06.004

Cited by 73 publications

(41 citation statements)

References 19 publications

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“…Besides the band corresponding to the OH stretching of water, all three Logbaba samples had an additional band around 3530 cm −1 (3526, 3530 and 3527 cm −1 for LBB 01, LBB 02 and LBB 03, respectively). This band shows the presence of OH-stretching at the vicinity of 3500 cm −1 , similar to the Cretaceous-Tertiary kaolins from Sidi El Bader in Tunisia [30].…”

Section: Resultsmentioning

confidence: 97%

“…Most of the studied kaolins had the four distinguishable bands, though the second transmittance band (3670 cm −1 ) had low intensities. This band usually appears in well crystallised kaolinite [30]. This transmittance band was not present in BKL 03, EDK 03, MSL I 01, MSL I 02 and YTK 02A (Figure 2), which therefore are not well crystallised.…”

Section: Resultsmentioning

confidence: 99%

“…The 3439 cm −1 band in BKL 03 could either be attributed to the OH stretching of water in this sample or to the presence of smectite [13,30]. Bomkoul kaolins are reported to also be smectitic [15,19].…”

Section: Resultsmentioning

confidence: 99%

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Fourier Transform Infrared Spectroscopy of Clay Size Fraction of Cretaceous-Tertiary Kaolins in the Douala Sub-Basin, Cameroon

et al. 2017

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Abstract:The structural order of Cretaceous-Tertiary kaolins of the Douala Sub-Basin in Cameroon was determined in this study. This was achieved using Fourier Transform Infrared spectroscopy (FTIR) with attenuated total reflectance (ATR) on the Bomkoul, Dibamba, Ediki, Logbaba, Missole and Yatchika kaolins. Transmittance spectra of 20 samples were recorded in the mid-infrared regions (MIR). Results show that most of the kaolins had the four distinguishable bands in the hydroxyl (OH) stretching region, though the second transmittance band (3670 cm −1 ) had low intensities. The hydroxyl stretching of water bands (3457 and 3442 cm −1 for KGa-1b and KGa-2, respectively) were mainly observed in all Logbaba samples at 3443 cm −1 and 3445 cm −1 . The two bands reflecting OH deformation of inner-surface hydroxyl and inner hydroxyl groups (937 and 915 cm −1 ) were quite visible in the Bomkoul, Dibamba, Logbaba and Missole II samples; slightly visible in all Yatchika and two of the Ediki; and not visible in Missole I and one of the Ediki samples. Therefore, based on the empirical classification of the degree of order of kaolinite, 10 of the studied samples had ordered structures. Three displayed partially ordered structures; four had poorly ordered structures, and three exhibited disordered structures. This study revealed that kaolins from Dibamba, Logbaba and Missole II in the Douala SubBasin had the best crystallinity, which is one of the important characteristics needed for industrial applications.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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Fourier Transform Infrared Spectroscopy of Clay Size Fraction of Cretaceous-Tertiary Kaolins in the Douala Sub-Basin, Cameroon

et al. 2017

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“…14C) ra tios, fa vour ing pre cip i ta tion of kaolinite un der acidic con di tions (Meunier, 1995;Kadir and Ka rakaº, 2002;Felhi et al, 2008). In con trast, the con cen tra tion of al ka line el e ments and Al 2 O 3 + Fe 2 O 3 + MgO re sulted in an al kali con di tion suit able for the pre cip i ta tion of smectite (Weaver, 1989;Chamley, 1989;Christidis et al, 1995;Kadir et al, 2011).…”

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Mineralogical, geochemical and stable isotope studies of kaolin deposits in north-west Gonabad district (eastern Iran)

Zirjanizadeh

Rocha

Samiee

2018

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“…The clay fraction (<2 µm particles) was separated from those samples by sedimentation and centrifugation (Brindley and Brown, 1980;Felhi et al, 2008a;Felhi, 2010;Tlili et al, 2010). The XRD patterns of the bulk rocks and the three oriented samples of <2 µm clay particles (untreated, ethylene glycol saturated, and heated at 550°C) were used in order to determine the bulk rock mineralogy and the clay mineral assemblages, respectively.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Mineralogical and geochemical studies of Ypresian marly clays and silica rocks of phosphatic series, Gafsa-Metlaoui basin, southwestern Tunisia: implication for depositional environment

et al. 2011

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Thick Ypresian marly clays and silica rich rocks constitute the so-called interbedded facies of phosphatic series, in the Gafsa-Metlaoui basin, southwestern Tunisia. Mineralogical and geochemical investigations are carried out on selected samples from Kef Eddour section. The data obtained by using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Energy Dispersive X-ray microanalysis (EDX) and chemical analysis and IR of clay fractions indicate that the bulk rock samples are composed of cristobalite-tridymite and dolomite. Observation by SEM showed the occurrence of dolomite as a well-crystallized and a weathered shape. Whereas, cristobalite-tridymite observed in the cherty bed appears as a spheres, filling the pore spaces. However, samples which contain moderately a significant amount of feldspars, clinoptilolite and pyrite occur in the upper part of Kef Eddour section. Clay minerals consist mainly of smectite, palygorskite, and sepiolite. In this clay assemblages, the N-alkane (m/z = 57) distributions, revealed that organic matter has phytoplankton and bacterial origin. The Pristane/Phytane ratio indicated that the organic matter is deposited in a reduced environment. In this latter, sulfate-reducing bacteria generate hydrogen sulfur, which is incorporated on the organic biomolecules that occurred at the lower part of Kef Eddour section. However, the high Fe activity on the depositional environment favored the occurrence of pyrite in the upper part.

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Mineralogical study of kaolinitic clays from Sidi El Bader in the far north of Tunisia

Cited by 73 publications

References 19 publications

Fourier Transform Infrared Spectroscopy of Clay Size Fraction of Cretaceous-Tertiary Kaolins in the Douala Sub-Basin, Cameroon

Fourier Transform Infrared Spectroscopy of Clay Size Fraction of Cretaceous-Tertiary Kaolins in the Douala Sub-Basin, Cameroon

Mineralogical, geochemical and stable isotope studies of kaolin deposits in north-west Gonabad district (eastern Iran)

Mineralogical and geochemical studies of Ypresian marly clays and silica rocks of phosphatic series, Gafsa-Metlaoui basin, southwestern Tunisia: implication for depositional environment

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