Home – Home – Jornals – Russian Geology and Geophysics 2002 number 9

Elvans are known from several rare metal provinces, where they are spatially and genetically closely related to subalkalic rare-metal granites. Elvan magmatism manifests itself at the final stage of the evolution of lower-crustal granitoid magma chambers. Elvans are produced by differentiation of a subalkalic granitoid magma. Occurrence of elvans in zones of deep-seated faults and dike belts, where basite and monzonitoid magmatism is expressed, as well as isotope-geochemical data suggest that the elvan formation was much affected by a subcrustal fluid enriched in specific rare elements.