Corundum mineralization in the marbles from the vicinity of Mishevsko village, the Eastern Rhodopes, Bulgaria - preliminary data

Corundum (ruby and sapphire) mineralization is outcropped among the marbles from the Startsevo lithotectonic unit in the area of Mishevsko village, Kardzhali region. This mineralization is located in the foliation planes in the marbles and associates with graphite, rutile, muscovite (phengite), phlogopite, amphibole (pargasite), clinochlore (sheridanite). Based on the spatial and genetic relationships between corundum and associating minerals, we could hypothesize that the formation of corundum is a result of metamorphism of amphibolite facies, and the formation of phengite is associated with the import of Si during the process of migmatization. The appearance of clinochlore (sheridanite), tremolite, palygorskite is most likely the result of later low-temperature processes. The present work is the initial phase of the study of corundum, in the area, its distribution and geological setting of formation.