Rhythmic-banded aplite-pegmatoid rocks forming lenses in apical parts of late Jurassic sualkali peraluminous Li-F amazonite granite.
Alternance of quartz-albite aplite, quartz-amazonite, quartz-micas layers and coarse grained quartz-amazonite pegmatoid layers.
The layering is caused by oscillation of physico-chemical parameters during fractional crystallization of the volatile residual saturated Li-F melt together with a liquid immiscibility phenomena.
The parental melt of the banded rocks, NB/Ta-saturated during early stages of crystallization is the consequence of the removal of interstitial residual melt from the deep part of the intrusion and implacement into a previously solidified carapace.
http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Zaraisky.html (Previously published in: Mineral Deposits: Research and Exploration Where do They Meet? Proceedings of the Fourth Biennial SGA Meeting , Turku/Finland/11-13 August 1997 , Heikky Papunen (ed.), A.A. Balkema, Rotterdam, Brookfield, 1997, pp.695-698)and F.G. Reyf et al. , The Canadian Mineralogist, 2000, Volume 38, number 4, Pages 915-936.
20 entries listed. 12 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
This page is currently not sponsored. To sponsor this page click here.