Beryl and others gem varieties represent the most valuable gemstones due to their good
appearance and high hardness (after diamond and ruby). Beryl is a rare mineral due to lack …

Granites constitute the main rock components of the Earth's continental crust, which
suggested to be formed in variable geodynamics environments. The different types of …

Zircon Hf isotopic compositions for Neoproterozoic igneous rocks in the Central Eastern
Desert of Egypt are presented and interpreted. The Humr Akarim (633±7 and 603±9 Ma) …

Abstract The Humr Akarim and Humrat Mukbid plutons, in the central Eastern Desert of
Egypt, are late Neoproterozoic post-collisional alkaline A-type granites. Humr Akarim and …

ABSTRACT High-grade granitoid gneisses (740–710 Ma) and elongate bodies of
amphibolite and hornblende schist with cm-scale layers of garnet pyroxenite form an …

The Takab complex is composed of a variety of metamorphic rocks including amphibolites,
metapelites, mafic granulites, migmatites and meta-ultramafics, which are intruded by the …

Field geology, geochemical studies and spectrometric prospecting were used to detect rare
metals and uranium mineralization in Neoproterozoic garnetiferous muscovite granites from …

Suites of granitic and metamorphic rocks form a perfect geological environment in which to
investigate the source of metals related to gold deposits. In the East Province of Cameroon …

Most earlier geochemical studies on Egyptian granites rely on the use of old conventional
discrimination diagrams in deducing the tectonic settings of these rocks (eg Pearce et al …

Until the revival of gold exploration in Ghana in the late 1980s, only two major types of gold
deposit types were extensively studied within the Birimian metallogenic province in Ghana …