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Conferences & Meetings XIII All-Russian conference on thermobarogeochemistry in conjunction with IV APIFIS symposium
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Origin of allivalites in Ksudach volcano (South Kamchatka): constraints from olivine-hosted melt inclusions

RMS-DPI code:  2008-1-44-1
Scientific session:  Fluid inclusions in magmatic minerals as indicators of magmas generation conditions and evolution
Author listing:  Shishkina T.A., Plechov P.Yu., Portnyagin M.V.
Principal author:  Shishkina Tatiana Aleksandrovna
Language:  English
Abstract - Summary 
(short description):
Blocks of olivine-anorthite and clinopyroxene - olivine - anorthite cumulates (allivalites) occure in andesitic, dacitic and rhyolithic pumices of some large eruptions of Ksudach volcano (Kamchatka). We studied samples of allivalites erupted in 1907 from Shtubel cone of Ksudach (KSht3). Allivalites have cumulous, porphyry textures and massive, taxitic structures. Rock-forming minerals of allivalites are olivine (Fo75-80) and anorthite (An92-96). Studying of homogenized melt inclusions in olivines gave us formation conditions of allivalites: T = 970-1040, Ps = 1-2 kbar, 2.93.3 wt.% H2O, fO2 on NNO+1 level. Fractionation of allivalite - beared melt is 26%, as calculated from Zr in melt inclusions.
 
Date of presentation:  22/09/2008
 
RMS-DPI code:  2008-1-44-1
Proceeedings volume 
in the RMS catalogue:
 
Proceedings of XIII International conference on thermobarogeochemistry and IVth APIFIS symposium. Volume 1.
Pages:  183-186
File of proceedings 
(PDF): 
 153 K
Status:  printed
Recieved:  30/03/2008
Accepted:  28/06/2008
Published on-line:  13/02/2009
Permanent address of publication:  http://www.minsoc.ru/2008-1-44-1/
Contact author(s):  Shishkina, Tatiana Aleksandrovna
 

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