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Doklady Earth Sciences

, Volume 452, Issue 1, pp 953–957 | Cite as

First data on composition of the volcanic rocks of the IVS 50th anniversary Fissure Tolbachik eruption (Kamchatka)

  • A. O. VolynetsEmail author
  • D. V. Melnikov
  • A. I. Yakushev
Geochemistry

Abstract

First data on major, minor and trace element (XRF. 1CP-MS) concentrations in the volcanic rocks of the IVS 50th anniversary Fissure Tolbachik eruption are reported for the period from 27.11.2012 to 25.01.2013; scheme of lava flows distribution by March 2013 is made. The volcanic rocks of the new eruption are substantially different from the other studied volcanic rocks of Tolbachinsky Dol by their higher alkalis and incompatible elements content. The rocks of the first three days of eruption (Menyailov Vent) have higher silica and alkalis content than all previously reported volcanic rocks of Tolbachinsky Dol. Volcanic rocks of the Naboko Vent, at silica content similar to high-Al basalts of Tolbachinsky Dol, have different concentrations of trace elements and some major elements (K2O, CaO, TiO2, P2O5). REE and other incompatible element concentrations in the rocks of the Menyailov Vent are higher than in the rocks of the Naboko Vent at the same element ratios. The differences of the volcanic rocks of the two vents of the new eruption may be caused by the fact that the erupted lavas came from the different levels of the same magma chamber.

Keywords

Fissure Tolbachik eruption Tolbachinsky Dol basaltic trachyandesites major and trace elements REE magma Kamchatka 

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Copyright information

© Pleiades Publishing, Ltd. 2013

Authors and Affiliations

  • A. O. Volynets
    • 1
    Email author
  • D. V. Melnikov
    • 1
  • A. I. Yakushev
    • 2
  1. 1.Institute of Volcanology and Seismology FEB RASPetropavlovsk-KamchatskyRussia
  2. 2.Institute of Geology of Ore Deposits, PetrographyMineralogy and Geochemistry RASMoscowRussia

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