Geochronology and geochemistry of ore‐related granitoids in the giant Gariatong Rb deposit, Tibet and implications for Rb metallogeny in China

Abstract Rubidium (Rb) deposits mostly occur in the South China and Central Asia orogenic belts are often closely associated with highly differentiated granites. This study aimed to investigate a newly discovered giant Rb deposit at Gariatong Lhasa terrane Tibet. Detailed field studies logging data revealed that mineralization mainly occurrs monzogranite is related greisenization. LA‐ICP‐MS U‐Pb dating of zircon yielded ages 19.1 ± 0.2 Ma 19.0 for greisenized fresh monzogranite, respectively. The monzogranites characterized as strongly peraluminous high contents SiO 2 , Al O 3 K O, Na differentiation index. They enriched light rare earth large ion lithophile elements significant negative Eu anomalies depleted field‐strength elements. Petrological geochemical features these ore‐related suggest they fractionated S‐type granites derived from remelting crustal materials post‐collisional setting. geochemistry apatite points low oxygen fugacity during magma evolution. discovery suggests may be an important region metal mineralization.