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Crystallogenesis and Mineralogy
Saint Petersburg, Russia
1-5 October 2007
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Conferences & Meetings 2nd International Conference "Crystallogenesis and Mineralogy"
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The exsolution lamellae in clinopyroxene from xenolith of complex eclogite of the kimberlite pipe Obnazhennaya (Yakutia)

RMS-DPI code:  2007-1-144-0
Scientific session:  Session 5. Crystal chemistry and crystal morphology of minerals
Author listing:  Pokhilenko L.N., Pokhilenko N.P., Stenina N.G., Sobolev N.V.
Principal author:  Pokhilenko Liudmila Nikolaevna
Language:  Russian
Abstract - Summary 
(short description):
Mineral peculiarities of the unique eclogite O-160 were studied. Microstructures of clinopyroxene from the different parts of xenolith and the exsolution reactions allow these reactions to be associated with certain stages of evolution of mantle substance. The results of the study of mineral relationships, compositions, character of exsolution structures (the lamellae of garnet, corundum, kyanitt, anortite in one part of the sample and the lamellae of garnet, anortite in another part) indicate the different stages of rock cooling and clinopyroxene breakdown during decompression. Ca-Tschermak minal (Ca-Eskola rarely) is of first importance in the formation of the above-listed lamellae. Disorder of clinopyroxene matrix structure including the cryptocrystalline one, which is against the lamellae, is probably related to the complicated mechanism of clinopyroxene breakdown.
 
RMS-DPI code:  2007-1-144-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  325-328
File of proceedings 
(PDF): 
 317 K
Status:  printed
Recieved:  28/04/2007
Accepted:  07/05/2007
Published on-line:  06/01/2008
Permanent address of publication:  http://www.minsoc.ru/2007-1-144-0/
Contact author(s):  Pokhilenko, Liudmila Nikolaevna
 
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