ABSTRACT The weathering of some silicate minerals in crushed rocks may occur a few days cropping and generate different physicochemical properties, with potential benefits to tropical soils. This study aimed investigate the infuence maize (Zea mays L.) rhizosphere on products cation exchange capacity Mg-biotite from biotite schist Fe-biotite syenite. An experiment was carried out pots, so that ...

We examined an alkaline ring complex in the Eastern Desert of Egypt, Wadi Dib (WDRC), to understand formation mechanisms intimately related structure and chemical diversity. The WDRC consists multiple circular rings oldest volcanic units, middle-stage plutonic unit, youngest dike these units show overlapping whole-rock major element compositions. compositional variation can be accounted for by ...

Abstract Alkaline igneous rocks host many global high-field-strength element (HFSE) and rare-earth (REE) deposits. While HFSEs are commonly assumed to be immobile in hydrothermal systems, transport by late-stage fluids associated with alkaline magmas is reported. However, the magnitude of flux conditions poorly constrained yet essential understanding formation REE-HFSE ores. We examined alterat...

The Mont Shefford alkaline complex of southern Quebec contains mafic rocks and both silica-oversatwated and -undersaturated syenites. Chemical and isotopic studies examine the relationship of the various lithologies. Isotopic, major, and trace-element compositions are consistent with derivation of all Iithologies from a common mafic paren! some of which evolved to a syenitic itage by fractional...

Abstract The influence of inorganic minerals (colemanite and nepheline syenite) as additives for sustainable clay brick manufacture has been examined. Each additive was added at 4 wt% to 96 samples were fired 950 °C 1040 then compared with 100% clay. Multiple analytical techniques (X-ray fluorescence, dilatometry, boiling water absorption, volumetric shrinkage, mercury porosimetry) used analysi...