Article The aenigmatite-rhonite mineral group

https://www.researchgate.net/publication/231167120_Fluid-rock_interaction_in_autoliths_of_agpaitic_nepheline_syenites_in_the_Ilimaussaq_intrusion_South_Greenland

Best Regards Federico Lucci

Hi Federico, yes but only in phonolitic basalts (e.g. Melluso et al. 2014, Lithos 210: 242-259). Cheers Daniel

Thank you Daniel Muller,

the paper you suggested to me is very interesting.

However i need to find some reference (if it is exist) on aenigmatite in real basalt.

Thank You

Talvez essa

https://www.schweizerbart.de/papers/ejm/detail/11/83179/The_aenigmatite_rhonite_mineral_group

Dear Ubaldo Gemusse Ubaldo Gemusse, Thank You very much for this interesting paper!

F

Dear Federico, rhoenite is known in Tertiary alkali basalts of southern Slovakia since 1965, when it was first described as breakdown product of amphibole phenocrysts or as a groundmass mineral. More recently, it was also described in primary melt inclusions in peridotite and carbonatite xenoliths in the same basalt. The rhonite from melt inclusions is primary magmatic and crystallized from parental melt of basaltic trachyandesite to trachybasalt composition. Relevant electron microprobe data can be found here:

Huraiová M – Konečný P – Hurai V (2007) Nové nálezy minerálov skupiny enigmatitu na Slovensku. Mineralia Slovaca 39, 131-139 (posted on my research gate website)

and here:

Hurai V - Huraiova M - Konecny P - Thomas R (2007) Mineral-melt-fluid composition of carbonate-bearing cumulate xenoliths in Tertiary alkali basalts of southern Slovakia. Mienralogical Magazine 71, 63-79

Vratislav Hurai

Your suggestion are very interesting

Since your strong background, could you give me some informations also about the other two minerals of the series? i.e. Aenigmatite and Wilkinsonite?

Best

Federico

Dear Federico, only Ca-rich members of the aenigmatite group , corresponding to rhonite and "baikovite", have been recorded in alkali basalts.