Russian Mineralogical Society
2nd International Conference "Crystallogenesis and Mineralogy"
Paralavas - melted rocks from ancient combustion metamorphic complexes within Kuznetsk coal basin

RMS-DPI code:  2007-1-139-0
Scientific session:  Session 5. Crystal chemistry and crystal morphology of minerals
Author listing:  Korzhova (Novikova) S.A.
Principal author:  Novikova Sonia Andreevna
Language:  Russian
Abstract - Summary 
(short description):
A set of unique melted rocks so called paralavas was found within the limits of ancient combustion metamorphic complexes of the Kuznetsk coal basin. Their chemical and mineral compositions have no analogues among abyssal rocks. The main mineral constituents of paralavas are Fe-rich K-bearing cordierite, Al-bearing tridymite, high-aluminous clinopyroxenes, basic plagioclases, fayalite, hercynite-magnetite. The principal difference between combustion metamorphic rocks and sanidinite facies rocks is the intensive melting of metapelites, as well as other silicate protoliths. This process is completed by the formation of calcium-rich and ferrous-rich high-silica or basic paralavas. Commonly, these rocks are extremely heterogeneous on a scale of tens to hundreds of micrometers and are characterized by an unusual mineral composition, including the presence of various glasses.
 
RMS-DPI code:  2007-1-139-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  310-312
File of proceedings 
(PDF): 
 273 K
Status:  printed
Accepted:  11/05/2007
Published on-line:  06/01/2008
Permanent address of publication:  http://www.minsoc.ru/2007-1-139-0/
Contact author(s):  Korzhova, Sonia Andreevna

Copyright © Russian Mineralogical Society, 1995-2011. All rights reserved.
http://www.minsoc.ru
printed on 22/10/2019