Confirmation of participation deep mantle plyuma in magmatism under Fernando-de-Noronya archipelago

Scientific laboratories of isotope geochemistry and geochronology GEOKHI RAN, together with foreign colleagues, studied mantle xenoliths (inclusion of alien breeds) from the lava streams which have streamed on one of islands of the archipelago of Fernando-de-Noronya (fig. 1). Fig. 1. The schematic geological map of the archipelago of Fernando-de-Noronya located approximately in 350 kilometers from the northeast coast of Brazil. The place of selection of mantle xenoliths is shown by a red asterisk. Essentially important data on isotope composition of noble gases which showed presence of helium are for the first time obtained and...