Granite-related uranium ore is an important resource type in China and worldwide. Whether the geochemical theory “U6+ oxidative migration U4+ reductive precipitation” applicable to granite-related mineralization has not been determined. Detailed field petrographic work, as well scanning electron microscopy energy spectrum analysis, are conducted this study analyze relationship between minerals ...

This work discusses the results from a set of physical and mechanical test conducted on 46 cubic samples granite north Portugal widely used in local granite-built UNESCO World Heritage sites, heated furnace at temperatures ranging 105 to 700 °C cooled under different conditions. Then, obtained are compared with an extensive database published case studies, showing that porosity, unit weight, ul...

Lithium (Li) can be found in many minerals, including lepidolite. Lepidolite is pegmatite-related tin deposits the Phang Nga area southern Thailand. According to their field occurrence, petrography, mineral chemistry, and whole-rock geochemistry, Li-bearing pegmatites granitic rocks study linked Thailand as part of SE Asian belt. The are characterized by an abundance lepidolite, K-feldspar, pla...

the eocene volcanic rocks from the southwest of the jandaq (kuh-e-godar-e-siah, central-east iran micro-continent) are andesitic basalt and andesite in composition. these rocks contain xenoliths with granulitic mineralogy. mineral assemblage of these xenoliths is plagioclase + phlogopite + corundum + sillimanite + chlorite + phengite with granublastic, poiklioblastic and foliated textures in th...

At the first site, the Weinsberg (Moldanubian) granite and an older quartzmonzonite facies of the South Bohemian pluton in Austria both contain orthopyroxene and clinopyroxene and must have crystallized from magmas at high temperatures. The granite contains orthoclase megacrysts (as much as 10 to 20 cm long), which (1) are chemically zoned with Ba-rich cores (1 to 2 % mol Cs; and locally as muc...

Abstract Low mechanical resistance and high weight restrict use of natural stones in applications where tensile or flexural capacity is required together with a low weight, such as for long spans or thin sections (e.g., cladding, countertops, desktops). The use of composite laminates as external reinforcement both to increase the mechanical resistance and to decrease weight of natural stone is ...