Geochemical characteristics of magnesiocarbonatites from Muostalaah apatite occurrence and Birikeen apatite deposit (Aldan-Stanovoy shield, South Yakutia, Russia)

Apatite-bearing ore occurrence Muostalaah and phosphate deposit Birikeen are magnesiocarbonatite complexes of the Seligdar type, located within Nimnyrskaya submeridional metallogenic domain in Aldan-Stanovoy shield South Yakutia, Russia. This study presents geochemical characteristics carbonatites adjacent apatite-bearing silicate rocks apatite occurrence. Comparison these with other world was made. Based on chemical analysis petrogenic components Biriken carbonatites, it concluded that belong to magnesiocarbonatites, similar magnesiocarbonatites deposit. The chondrite-normalized REE spectra characterized by LREE enrichment relative HREE average La/Yb(cn) ratios 45 100 for rocks, respectively. Most patterns field magnesiocarbonatites. trace-elements abundances record negative Nb, Pb, Sr, Zr, Hf Ti anomalies Th, U enrichment. Сoncentrations U, a wide spread values. trace-element generally including rocks. results isotopic studies Sm/Nd Rb/Sr systems, primary melts Muostalah were formed from long-lived enriched mantle source separated depleted Late Archean.