The Ziminy Sopki Volcanic Massif: Geology and mineralogy of rocks (the Klyuchevskoy Volcanic Group, Kamchatka)

• Published in: Bulletin of Kamchatka Regional Association «Educational-Scientific Center». Earth Sciences
• Main Authors: Flerov G.B., Churikova T.G., Gordeychik B.N., Ananyev V.V.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Institute of Volcanology and Seismology FEB RAS 2019
• Subjects: associations; andesite-basalts; potassium alkalinity; chamber; ziminy sopki volcanic massif; Geology; QE1-996.5; Kamchatka
• Online Access: https://doi.org/10.31431/1816-5524-2019-4-44-19-34; https://doaj.org/article/0e3ed977b49549d9a7f005fa396815bc

The Ziminy Sopki Volcanic Massif is remarkable for its co-formation from magmas of different potassium alkalinity manifested by three rocks associations (series) with individual evolutional trends: I — andesite-basalts — andesites — dacites; II — andesite-basalts — the intermediate composition andesites; III — high potassium andesite-basalts. Variations of rocks from the revealed series manifest themselves in the above mentioned mineral associations, and the discreteness of rocks regression lines evidence on quite autonomous parental magmas. Orthogonal trends of minerals composition alterations in andesite-basalts with the vector correlating with the potassium alkalinity increase in rocks of associations evidence on existence of the process leading to the enrichment of these magmas with potassium. Thus, we can conclude that, within the single penetrated magmatic system, there are deep intermediate chambers with different conditions for formation of the initial andesite-basalt magmas, which during volcanic activity directly associated with the deeper parental basaltic magma.