Based on mineralogical and technological investigations of the deposit “Greda” important characteristics of bentonite clay were determined. Representative samples of the deposit were characterized with X-ray diffraction, low-temperature nitrogen adsorption, ...

This study identifies a range of feldspar textures in target rocks from the Tenoumer impact crater that suggest feldspars exhibit a range of impact-related features which span a range below the 8 GPa limit of quartz deformation.

<p>Previous studies [O&rsquo;Kane, A., Onasch, C.M., Farver, J., 2007. The role of fluids in low-temperature, faultrelated deformation of quartz arenite. Journal of Structural Geology 29, 819&ndash;836; Cook, J., Dunne, W.M., Onasch, C.M., 2006. Development ...

The understanding of the subduction-related processes benefited by the studies of the high-pressure (HP) metamorphic rocks from the western Alps. The most stimulating information was obtained from the inner part of the western Alpine belt, where most tectonic ...

In this paper clay-rich sediments from the Kajjansi, Kitiko, Kitetika, and Ntawo valleys in central Uganda were analyzed for mineralogical and chemical composition, including the rare earth element (REE) contents.

This paper is about the interpretation of microstructures involving quartz and feldspar in metamorphic rocks.

This paper is about the origin of graphic granite that has been shown to be the result of simultaneous growth of the two phases under conditions that favor the planar growth of the feldspar host.

In the Dahomeyan of the western Accra Plains mafic gneisses, amphibolites, and orthoamphibolitedykes in granitic gneiss occur. This paper is a study of these gneisses.

<p>The petrographic features of the carbonate rocks from the Ionian Zone in the Etoloakarnania Prefecture are presented. They are represented by limestones with minor dolomite. The limestones include:<br />(i) wackestones (or sparse micrites), with poor presence ...