Russian Mineralogical Society
XI RMS General Meeting “Modern mineralogy: from theory to practice” combined with the Fedorov Session 2010
Quartz-plagioclase symplectites (calcic myrmekite): the first finding in gabbro in the Urals

RMS-DPI code:  2010-1-20-0
Scientific session:  M1. Current state and prominent problems in mineral science and new trends in investigation of minerals, rocks and ores.
Author listing:  Efimov A.A., Flyorova K.V., Maegov V.I.
Principal author:  Efimov Alexander Alexandrovich
Language:  Russian
Abstract - Summary 
(short description):
Symplectites quartz + the basic ("calcic myrmekite") for the first time are found out in gabbro-norite of the Kytlym massif (the Uralian Platinum Belt). They are situated in plagioclase grains in the form of units with sharp borders to 0.5 mm in a diameter. The host plagioklase composition fluctuates from An61 to An64, myrmekite plagioklase – from An74 to An81. At borders of symplectites the plagioclase composition changes jump. The quartz maintenance in symplectites are approximately 7-10 %. Calcic myrmekite can be interpreted as an interaction product between plagioclase crystals in gabbro and the high-temperature water fluid which was introducing Ca and Al and taking out Si, Na and K.
Calcic myrmekite, gabbro, Urals
 
Date of presentation:  12/10/2010
Time of presentation:  17:00
Presentation Place:  Mining University, Hall 1164
 
RMS-DPI code:  2010-1-20-0
Proceeedings volume 
in the RMS catalogue:
 
Modern mineralogy: from theory to practice
Pages:  51-53
File of proceedings 
(PDF): 
 361 K
Status:  printed
Accepted:  14/07/2010
Published on-line:  21/11/2010
Permanent address of publication:  http://www.minsoc.ru/2010-1-20-0/
Contact author(s):  Efimov, Alexander Alexandrovich

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