Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Omulevskii

stripes

Occurrence number: 
136-15-007
Country: 
Russia
Region: 
Omolon
Location: 
Longitude: 149, Latitude: 64.67
Carbonatite: 
No

This occurrence consists of small and sparse dykes and stocks of porphyritic alkaline picrite and teschenite-picrite with segregations of more leucocratic teschenite. Camptonites and lamprophyres with amphibole also occasionally occur. The rock-forming minerals of the suite are plagioclase, barkevikite, biotite and occasionally olivine, clino- and orthopyroxene and analcime.

Age: 
Late Cretaceous, on geological evidence.
References: 

LYCHAGIN, P.P. 1982. Alkali basic rocks in the North-East of the USSR. Pacific Geology 6: 85-93.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith