Tury Mys

Thanks to Diederik Visser for specimen, to Mauride de Graaf for mineral lists, and to Peter G.Seroka for the Woolley book.

On Turiy Peninsula there are several subvolcanic intrusions with associated dykes and veins. The 3 largest massifs are 28, 13, and 15 km² respectively.
There are ultramafic rocks like olivinite, clinopyroxenite, feldspathoidal mafic rocks like melteigite, ijolite, and ijolite-urtite, melilite-bearing rocks, breccia of ijolite porphyry, phsocorite and carbonatite, and „dyke rocks“. The structures of the intrusions are complicated, showing transformation of initial single intrusive bodies in confocal structures with central carbonatite/phoscorite stocks. With each emplacemten the older rocks were intensely alterated.
The „dyke rocks“ in the centre and teh S are alkaline lamprophyres and olivine melteigites, nephleineite, noseanite and others.

 


&Suggested reading:
Kogarko,L.N., V.A.Kononova, M.P.Orlova, A.R.Woolley: Alkaline Rocks and Carbonatites of the World. Part 2: Former USSR. Chapman and Hall, London, 1995.


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