The Genesis of the Askartor Be-Mo Deposit in the North Xinjiang, Northwest China: Evidence From Geology, Geochemistry, U-Pb, and Re-Os Geochronology

The Askartor Be-Mo deposit is located in the southeastern area of Chinese Altay orogenic belt Xinjiang, NW China. Zircon U-Pb data show that there are two periods magmatic activities ore district, namely, Devonian granodiorite (386.8 ± 2.6 Ma) and biotite granite (385.4 4.4 Ma), Triassic two-mica (247.5 2.2 muscovite (231.4 2.0 Ma). zircon age pegmatoid orebody 220.6 1.6 Ma which coincides with molybdenite Re-Os isochron 228.7 7.1 Ma. granites belong to high-K Calc-alkaline series peraluminous features, characterized by high SiO 2 (71.92–75.41 wt%), Al O 3 (13.43–15.98 low TiO (0.01–0.25 Fe (0.11–1.14 wt%) CaO (0.07–0.76 wt%). highly fractionated element ratios Y/Ho, Zr/Hf Nb/Ta, rare earth tetrad effect occur granite, indicating fluid exsolution occurs at late stage magma evolution, experienced strong self-metasomatism. Rayleigh fractional calculations product multistage crystallization initial Be-enriched magma.