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Fedorov session 2016
Saint Petersburg, Russia
11-12 October 2016
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Zirconolite, baddeleite, chevkinite, ilmenite, zircon, thorite, orthite, monazite of the island-arc anorthite-bytownite quartz gabbro-norite-dolerites at Ayu-Dag intrusive, Krimea

RMS-DPI code:  2016-1-64-0
Scientific session:  2. Applied mineralogy
Author listing:  Spiridonov E.M., Filimonov S.V., Korotayeva N.N., Semikolennych E.S.
Principal author:  Spiridonov Ernst Maxovich.
Language:  Russian
Abstract - Summary 
(short description):
A complex of accessory minerals: ilmenite, apatite, zirconolite, chevkinite, baddeleite, zircon, thorite, pyrrhotite, orthite, monazite and others was studied in island arc quartz anorthite-bytownite gabbro-norite-dolerites of Ayu-Dag intrusion (Mountain Crimea). Obviously, the zirconolite in non alkaline magmatites was defined for the first time; its composition corresponds to zirconolite 3O; Y prevails in the first crystallochemical position. Baddeleite, zirconolite and chevkinite fix an early stage of crystallization, when Ayu-Dag magma has been not saturated by silica. Maybe, zirconolite and chevkinite are preserved in the Ayu-Dag gabbroides, because late and post-magmatic processes are low expressed. Chevkinite was partly replaced by orthite during magmatic crystallization with an increasing of silica activity. Chemical composition of zirconolite, chevkinite, baddeleite, thorite, orthite, REE-epidote, monazite is presented. The difference between composition of restite and newly formed zircon and thorite is shown.
Key worlds: island arc, quartz gabbro-norute-dolerites, zirconolite, chevkinite, baddeleite, zircon, thorite, orthite, monazite
 
Date of presentation:  12/10/2016
Presentation Place:  √орный университет, ауд. 1171
 
RMS-DPI code:  2016-1-64-0
File of proceedings 
(PDF): 
 124 K
Status:  preprint
Accepted:  29/08/2016
Contact author(s):  Spiridonov, Ernst Maxovich.
 
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