Assimilation of crustal rocks by mafic magmas is considered important for the formation of sulfide ores. Radiogenic isotope systems may allow one to quantify the amount of contamination and to distinguish between possible contaminants. We have studied Sm-Nd, Rb-Sr, and U-Pb isotope systems in two mafic intrusions of the Nain Plutonic Suite: the 1333 Ma Voisey’s Bay intrusion that hosts the majo...

Inferences on the early evolution of Earth's mantle can be deduced from long-lived radiogenic isotope systems such as 176Lu-176Hf and 147Sm-143Nd, for which both parent daughter elements largely remain immobile at low metamorphic grades. However, it remains ambiguous when to what extent mantle-crust differentiation processes had started in Archean. For a better understanding Archean evolution, ...

The Yamaat Uul mafic complex with Cu-Ni mineralization is located in the Khangai Mountains of Western Mongolia. We have received new unique data for rocks complex: U-Pb dating (SHRIMP II), mineralogy (WDS) and geochemistry (XRF, ICP-MS), Sm-Nd Rb-Sr isotope sulphur isotopes. consists two intrusions: Intrusion 1 represented by plagioclase cumulates olivine–pyroxene cumulates; 2 monzogabbro. Intr...

Abstract Mercury (Hg) provides critical information on terrestrial planet formation and evolution due to its unique physicochemical properties multiform isotopic compositions. Current knowledge of Hg is mainly limited Earth's surface environments, the understanding in interior remains unclear. Accretionary orogens are major settings for continental crustal growth crust-mantle interactions. We s...

mafic and ultramafic plutonic igneous bodies, with small and big outcrops, between shemshak rock units (jurassic) are observed in east of imam zadeh hashem, in southern guilan province. ultramafic cumulates consist of clinopyroxenite, and plagiofer clinopyroxenite, olivine clinopyroxenite, and mafic rocks, based on mineralogy consist of gabbros, olivine gabbros, biotite gabbros and amphibole ga...

We present geochronological evidence in the eastern Himalayan syntaxis (Namche Barwa) for high-pressure (HP) granulite-facies metamorphism and explain its importance for understanding both the deep continental subduction of the Indian plate beneath Asia and its subsequent exhumation. The timing of peak and retrograde metamorphism in part constrains these processes but is debated. We present zir...