Parental melts of the last volcanic pulse in the Sedanka field, Sredinny Range, Kamchatka

Autor: M. Yu. Puzankov, A. B. Perepelov, O. V. Dirksen, M. Yu. Shur, L. I. Bazanova, N. A. Nekrylov, P. Yu. Plechov, K. A. Bychkov
Rok vydání: 2015
Předmět:
Zdroj: Moscow University Geology Bulletin. 70:233-239
ISSN: 1934-8436
0145-8752
DOI: 10.3103/s0145875215030060
Popis: Compositions of melts for the youngest and located hypsometrically below others eruption centers of Sedankinskiy field of areal volcanics were studied by the olivinehosted melt inclusions method. The trace� element content in the melts is reported for the first time. It is argued that the previously described lowpotas� sium melt group is a melting product of heterogeneous inclusions. The melts of these eruptions differ from those of the Kekunai field of areal volcanic rocks in trace element content within the measurement uncer� tainty. Having similar geochemical characteristics, they are in equilibrium with more magnesian olivine and, therefore, are the most primitive for the Holocene volcanic rocks of the Sredinny Range.The melts of the studied eruptions, which are in equilibrium with the most magnesian olivine, fall in the field of pyroxenite melting under hydrous conditions in the CMAS diagram and may be the result of nearly pure pyroxenite melting.
Databáze: OpenAIRE
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