PETROCHEMICAL TYPES OF IGNEOUS ROCKS OF OCEANIC ISLANDS

Abstract

The aim of our work was to summarize all accessible petrologic and geochemical information on oceanic islands and, from the results, to identify the petrologic and geochemical types of their constituent igneous rocks. The starting data were complete silicate analyses, published in more than 100 articles monographs. The total sample consisted of 2390 analyses. They were compared with data on other ocean morphostructures - mid-ocean ridges, volcanic rises and basins. The data indicate the specific features of igneous activity on the oceanic islands studied and agree well with the recently proposed petrochemical classification of bed rocks on the ocean floor.