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Crystallogenesis and Mineralogy
Saint Petersburg, Russia
30 September-4 October 2007
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Conferences & Meetings 2nd International Conference "Crystallogenesis and Mineralogy"
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Cr-spinel from picritic gabbro-dolerites of the Norilsk intrusions: composotion and origin

RMS-DPI code:  2007-1-131-0
Scientific session:  Session 5. Crystal chemistry and crystal morphology of minerals
Author listing:  Krivolutskaya N.A., Svirskaya N.M., Khramov I.V.
Principal author:  Kryvolutskaya Nadezhda A.
Language:  Russian
Abstract - Summary 
(short description):
The composition of olivines and Cr-spinels from picritic gabbro-dolerites from the Talnakh and Low-Talnakh intrusions have been studied by EPMA. Olivines from the Low-Talnakh massif are enriched by Mg (Fo77) comparing with the ones from the Talnakh intrusion (Fo73). Spinel from the Talnakh intrusion have high Cr and Ti contents while spinels from the Low-Talnakh massif have very high V2O5 concentration. These data were used for reconstruction redox potential of parental magmas for the massifs mentioned above. P were calculated according geobarometer Nimis and T were determinated by homogenization of melt inclusions. Calculated lgfO2 for melts of these two intrusions changes from Ц 5,17 to -3,61. According these data the ore-bearing intrusions are close to tuklonsky lavas and differ from gudchikhimsky picrites.
 
RMS-DPI code:  2007-1-131-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  288-290
File of proceedings 
(PDF): 
 377 K
Status:  printed
Accepted:  10/05/2007
Published on-line:  05/01/2008
Permanent address of publication:  http://www.minsoc.ru/2007-1-131-0/
Contact author(s):  Krivolutskaya, Nadezda Alexandrovna
 

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