Influence of clay mineralogy on the stability of a landslide in Plio-Pleistocene clay sediments near Grassano (Southern Italy)

Summa, Vito; Tateo, Fabio; Giannossi, Maria Luigia; Bonelli, C.G.

doi:10.1016/j.catena.2009.09.002

Cited by 22 publications

(23 citation statements)

References 12 publications

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“…Torrance, 1999;Sridharan, 2001). The behaviour of landslide clayey sediments is the response to their physical and mechanical properties, depending on water-clay interaction, clay fabric and clay mineral content, both quantitatively and qualitatively (Di Maio, 1996a, b;Martinez-Nistal et al, 1999;Cafaro and Cotecchia, 2001;Loroueil and Hight, 2003;Bogaard et al, 2007;Summa et al, 2007Summa et al, , 2008Summa et al, , 2010. For this reason, in the last few years, there has been an increasing scientific interest in the physical, chemical and mineralogical characteristics of sediments with respect to slope stability.…”

Section: Introductionmentioning

confidence: 99%

The influence of the grain-size, mineralogical and geochemical composition on the Verdesca landslide

Summa

Margiotta

Colaiacovo

et al. 2015

Nat. Hazards Earth Syst. Sci.

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Abstract. Silty sands and clayey silts taken from a landslide in the Agri Valley have been analysed in order to study the role of sediment composition in the slope stability and the development of a slip zone. A geognostic hole was used to collect samples and monitor movements. A slip zone at a depth of about 14 m was identified. Compositional and physical-mechanical characterisation of samples was carried out. Some compositional characters, such as a 32-2 µm grain-size fraction, clay mineral content, cation exchange capacity and total nitrogen, increase in the slip zone. Some correlations have been found between geotechnical properties (residual shear strength and residual friction angle) and the same compositional characters, which can therefore be considered possible factors influencing slope stability.

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Section: Introductionmentioning

confidence: 99%

The influence of the grain-size, mineralogical and geochemical composition on the Verdesca landslide

Summa

Margiotta

Colaiacovo

et al. 2015

Nat. Hazards Earth Syst. Sci.

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“…This is because a large abundance of sheet silicates (especially smectite) in slip zones is one of the fundamental controlling factors of sliding processes within landslides due to their high specific surface, water absorbing capacity and preferred orientation (Summa et al, 2010;Wang et al, 2011).…”

Section: Key Minerals In Landslidesmentioning

confidence: 99%

“…Kaolinite has typically platy morphology and commonly shows evidence for shear deformation. Thus the presence of kaolinite in slip zones and zones of discontinuity in clayey silty lithological formations can also facilitate slope failure due to its micromorphology (Summa et al, 2010). The accurate identification and quantification of kaolinite by X-ray diffraction (XRD), however, could be difficult when it coexists with other clay minerals.…”

Section: Key Minerals In Landslidesmentioning

confidence: 99%

“…The occurrence of sheet silicates, especially kaolinite seems to be common in landslide-prone sediments and its amount is considered to play an important role in sliding (i.e., Wen and Chen, 2007;Summa et al, 2010). Kaolinite is also known to occur in larger modal abundance with the increasing degree of weathering (Singer, 1984).…”

Section: Kaolinite In Atr Spectra Of Sediments and Its Importancementioning

confidence: 99%

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

Udvardi

Kovàcs

Kónya

et al. 2014

Sedimentary Geology

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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.

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“…The limestones of the Apulian platform plunge below the clastic filling up to 7 km below the present sea level. Despite the great extension of the Bradanic Foretrough, the blue clays are substantially homogeneous regarding mineralogy, plasticity, typical range of strength and stiffness [58][59][60], with some variations in grain size distribution only near the borders of the old sedimentary basin. Despite the great extension of the Bradanic Foretrough, the blue clays are substantially homogeneous regarding mineralogy, plasticity, typical range of strength and stiffness [58][59][60], with some variations in grain size distribution only near the borders of the old sedimentary basin.…”

Section: Geology Geomorphology and Hydrogeology Of The Study Areamentioning

confidence: 99%

Squeezed Interstitial Water and Soil Properties in Pleistocene Blue Clays under Different Natural Environments

et al. 2018

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Studies dating almost a century relate clay properties with the structure of the diffuse double layer (DDL), where the charged surfaces of clay crystal behave like an electric capacitor, whose dielectric is the interstitial fluid. The intensity of the inner electric field relates to the concentration and type of ions in the DDL. Other important implications of the model are less stressed: this part of the clay soil system, energetically speaking, is conservative. External contribution of energy, work of overburden or sun driven capillarity and long exposure to border low salinity waters can modify the concentration of pore-waters, thus affecting the DDL geometry, with electric field and energy storage variations. The study of clay soils coming from various natural geomorphological and hydrogeological contexts, determining a different salinity of interacting groundwater, shows how the clay interaction with freely circulating waters at the boundaries produces alterations in the native pore water salinity, and, at the nano-scale, variations of electric field and stored energy from external work. The swelling and the shrinkage of clay soil with their volumetric and geotechnical implications should be regarded as variations of the electrostatic and mechanical energy of the system. The study is based on tests on natural clay soil samples coming from a formation of stiff blue clays, widespread in southern Italy. Geotechnical identification and oedometer tests have been performed, and pore waters squeezed out from the specimens have been analyzed. Tested samples have similar grain size, clay fraction and plasticity; sorted according to the classified geomorphological/hydrogeological contexts, they highlight good correlations among dry density, mechanical work performed in selected stages of the oedometric test, swelling and non-swelling behaviour, and electrical conductivity of the squeezed pore waters. The work performed for swelling and non-swelling samples shows well-defined differences; this endorse the relevance of pore-water salinity in determining the volumetric state of clay soils under overburden and specific hydrogeological border conditions, which together define a specific energetic state.

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Influence of clay mineralogy on the stability of a landslide in Plio-Pleistocene clay sediments near Grassano (Southern Italy)

Cited by 22 publications

References 12 publications

The influence of the grain-size, mineralogical and geochemical composition on the Verdesca landslide

The influence of the grain-size, mineralogical and geochemical composition on the Verdesca landslide

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

Squeezed Interstitial Water and Soil Properties in Pleistocene Blue Clays under Different Natural Environments

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