Russian Mineralogical Society
XIII All-Russian conference on thermobarogeochemistry in conjunction with IV APIFIS symposium
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 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:  22/09/2008
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 
 102 K
Status:  printed
Recieved:  17/03/2008
Accepted:  27/06/2008
Published on-line:  13/02/2009
Permanent address of publication:
Contact author(s):  Smirnov, Sergey Zakharovich

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