Russian Mineralogical Society
XIII All-Russian conference on thermobarogeochemistry in conjunction with IV APIFIS symposium
The Gudchikhinsky Formation as a product of crystallization of the most primitive melts in the West Siberian trap province

RMS-DPI code:  2008-1-23-0
Scientific session:  Fluid inclusions in magmatic minerals as indicators of magmas generation conditions and evolution
Author listing:  Krivolutskaya N.A., Sobolev A.V., Kuzmin D.V.
Principal author:  Krivolutskaya Nadezda Alexandrovna
Language:  Russian
Abstract - Summary 
(short description):
Here we present new data on major and trace element compositions and volatile contents in parental melts for Gd2 picritic basalts Formation recovered from the study of homogenised melt inclusions in olivine phenocrysts by EPMA, LA-ICP MS and SIMS. We show that the composition of trapped melt varies from similar to tholeiitic OIB (e.g. Mauna Loa, Hawaii) with notable depletion in Pb, U, Th and Rb to those enriched in these elements. Abundances of these elements correlate with concentrations of Si, K (positively) and Nb, Ti (negatively). This suggests significant contamination of melt by continental crust during magma fractionation. All melts are severely undersaturated by S and contain low water concentrations. The composition of melts unaffected by crustal contamination indicate oceanic crustal component. This suggests that the recycled oceanic crust was a major source of Siberian flood basalts at the initial stage of LIP formation.
Date of presentation:  21/09/2008
Presentation Place:  IGEM RAS, Conference Hall
RMS-DPI code:  2008-1-23-0
Proceeedings volume 
in the RMS catalogue:
Proceedings of XIII International conference on thermobarogeochemistry and IVth APIFIS symposium. Volume 1.
Pages:  99-101
File of proceedings 
 170 K
Status:  printed
Recieved:  14/03/2008
Accepted:  27/06/2008
Published on-line:  12/02/2009
Permanent address of publication:
Contact author(s):  Krivolutskaya, Nadezda Alexandrovna

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