Elovyi Island (Elovaya)

In the northern part of Kandalaksha Bay, on Elovyi Island, a pipe (Elovaya) has been found which is 18x10.5 m and oval in section with the longest axis trending northeast. A sketch map will be found in Bindeman et al. (1990, Fig. 1). The contact with the enclosing granites and granite gneiss is sharp. The pipe is filled with an eruptive breccia, which is intersected by a dyke of picrite or monchiquite containing numerous eclogite inclusions. The eruptive breccia consists of fragments of rocks derived from depth, including feldspar and feldspar-free eclogites and rather fewer of modified peridotites, as well as angular xenoliths of the country rock Archaean granites and amphibolites and fragments of carbonated ultramafic rocks. The groundmass constitutes 12 to 15% of the volume of the breccia, and consists of fine-grained carbonate. Biotite-bearing xenoliths are described, with whole rock and mineral analyses, by Bindeman et al. (1990). In the central and northern parts of the island small (2x9 and 2x0.8 m) stocks of carbonatite occur. Thecarbonatites intersect a dyke of picrite.