Origin of potassium-rich silica-deficient igneous rocks /Происхождение богатых калием кремнедефицитных магматических пород

In this book the author attempts to provide up-to-date information about the geochemistry, exotic mineralogy, petrology, and experimental studies on ultrapotassic feldspathoid-bearing mafic and ultramafic rocks, which are quite distinct from the rocks of basalt family. The parental liquids for this intriguing group of rocks bear definite signature of their deep mantle source. Modern developments in earth science show that carbonates, N2, O2, P, H2O, and K-rich crustal materials can be recycled into the deep earth causing mantle metasomatism. Partial melting of such a modified mantle source could be responsible for the generation of such K-rich silica-deficient magmas.

Age determination of ultrapotassic rocks show that the origin of their parental liquids are related to the last few hundred million years of mantle evolutionary history in contrast to generations of komatiitic magmas, which were partial melting products of the mantle, evolved mainly during the Proterozoic or Archaean, albeit with a few exceptions.<...>