RUBIDIUM-STRONTIUM AGE OF ORE-BEARING LEUCOGRANITES OF THE BALYGYCHAN-SUGOY TROUGH, NORTHEASTERN USSR

Abstract

There always are considerable difficulties in accurately establishing the genetic relationship between ore deposition and magmatic activity. The ore-bearing igneous complexes of the Northeast are no exception in this respect. The metallogenic specialization and ore potential of most Late Mesozoic granitoid plutons here have not yet been reliably determined. The aim of this work was to date the above leucogranites by the rubidium-strontium method and, from the resulting Sr-isotope data, to try to solve some problems of their formation and that of the genetically related rare-metal mineralization.