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Conferences & Meetings XIII All-Russian conference on thermobarogeochemistry in conjunction with IV APIFIS symposium
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Pegmatite forming medium at the magmatic-hydrothermal transition (on example of Leskhozovskaya pegmatite, SW Pamir, Tajikistan)

RMS-DPI code:  2008-1-38-0
Scientific session:  Fluid inclusions in magmatic minerals as indicators of magmas generation conditions and evolution
Author listing:  Smirnov S.Z., Sazontova N.A., Konovalenko S.I., Thomas V.G., Danyushevsky L., Vladimirova I.A., Vladimirov A.G.
Principal author:  Smirnov Sergey Zakharovich
Language:  Russian
Abstract - Summary 
(short description):
Fluid and silicate melt inclusions in quartz of two-feldspar pegmatite, tourmaline-quartz-albite near miarolitic assemblage and miarole of the Leskhozovskaya miarolitic pegmatite, SW Pamir, were studied in order to understand P-T-X parameters of pegmatite-forming medium at the magmatic-hydrothermal transition. Thermometric study showed that crystallization of the assemblages under interest occurred at about 600ºC and 2.8 Ц 3.8 kbar. Silicate melts of this stage is characteristically poor in SiO2 and enriched in B2O3, F and H2O. Aqueous fluid has borate-boric acid composition with extremely low Cl-content. It was established that silicate liquids of the transitional stage tend to accumulate K, Ta and Nb, while aqueous fluid concentrates Na, Li, W and Sb. Both liquids accumulate B and Cs almost equally.
 
Date of presentation:  23/09/2008
Presentation Place:  IGEM RAS, Conference Hall
 
RMS-DPI code:  2008-1-38-0
Proceeedings volume 
in the RMS catalogue:
 
Proceedings of XIII International conference on thermobarogeochemistry and IVth APIFIS symposium. Volume 1.
Pages:  153-156
File of proceedings 
(PDF): 
 102 K
Status:  printed
Recieved:  18/03/2008
Accepted:  28/06/2008
Published on-line:  13/02/2009
Permanent address of publication:  http://www.minsoc.ru/2008-1-38-0/
Contact author(s):  Smirnov, Sergey Zakharovich
 

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