Abstract
Geochemical features of impurity elements and the analysis of mineral composition during crystallization allowed us to reveal traces of mixing of moderately potassic magnesium and high alumina magmas at Klyuchevskoy Volcano. Mineralogical features and distribution of Mg, Fe, Cr, Ni, Co, Al in olivines and clinopyroxenes in magnesium basalts and high alumina andesite basalts from the 1938, 1945, 1966 and 1994 flank and summit eruptions at Klyuchevskoy Volcano give evidence for injection of magnesium basaltic melts into high alumina magma.
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