The Jiajika rare metal deposit contains the largest area of granitic pegmatite-type deposits in China. X03 vein is an immense dominated by lithium, which was found recent years. contact metamorphic belt tourmalinization and petrochemistry widely developed its wall rocks, altered rocks formed contain Li other mineralization. In this paper, tourmaline different divided into four types: two-mica q...

The Itapuranga alkali granite and Uruana quartz syenite are large K-rich EW-elongated intrusions, in the central part of the Neoproterozoic Brasília Belt, central Brazil. They are associated with Pireneus lineaments, which cut the regional NNW-SSE structures of the southern part of the belt. SHRIMP and conventional U-Pb data for the Itapuranga and Uruana intrusions indicate crystallization ages...

Almandine-spessartine garnets, from the Oxford County pegmatites and Palermo No. 1 pegmatite, record significant compositional variations according to degree of evolution their hosting rock. Garnets most fractionated (Mt. Mica, Berry-Havey, Emmons) show highest Mn, Nb, Ta, Zr, Hf values, followed by those intermediate grade (Palermo 1) and, finally, garnets barren lowest values (Perham Stop-35)...

The petrography, as well as major and trace element (including rare earth element) compositions of 10 sandstone samples from the Late Proterozoic Buem Structural Unit, southeast Ghana, have been investigated to determine their provenance and tectonic setting. The petrographic analysis has revealed that the sandstones are quartz-rich and were primarily derived from granitic and metamorphic basem...

A net of pegmatite veins crosscut gneiss and dismembered ophiolitic ultramafic rocks are abundant in the Migif-Hafafit culmination area, South Eastern Desert, Egypt. Some these pegmatites corundum-bearing. Corundum-bearing studied eight localities around complex. The present study aims to integrate field investigation, whole rock corundum chemistry, remote sensing studies, conventional methods ...