Anomalous light oxygen isotope composition in minerals of corundum-bearing rocks in northern Karelia

An oxygen isotope analysis of corundum-bearing garnetamphibolephlogopite plagiogenneiss of the Protozeric age from the Chupa Sequence of the Belomorian Complex of the Khitostrov deposit was conducted. Based on the available data, the study concluded that minerals of the Khitostrov deposit are marked with condence, although it is hard to say now what process they are marking.