Rare-metal alaskites of the Mankhambo massif (Northern Urals): U-Pb (SIMS) data and isotope-geochemical characteristics

The study focuses on rare-metal alaskites discovered within the Mankhambo granitoid massif (Northern Urals). Petrographic-mineralogical and petro-geochemical analyses were conducted. The crystallization age was determined using U-Pb dating (SIMS) on single zircons; the Hf isotopic composition was analysed by LA ICP MS. The rocks are highly differentiated alaskites (Zr/Hf