Alkaline Rocks and Carbonatites of the World

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

Artem

stripes

Occurrence number: 
136-16-006
Country: 
Russia
Region: 
Primorye
Location: 
Longitude: 132.47, Latitude: 43.77
Carbonatite: 
No

In the Artem depression, in the vicinity of the city of Artem, lavas and sills of trachydolerite, shoshonitic absarokite and leucite and pseudoleucite shoshonitic absarokites are widespread. They also form dykes, stocks of up to 4 km2 and laccoliths. One of the laccoliths is formed by fergusites which are dark grey to black, porphyritic rocks with phenocrysts of biotite, sanidine, anorthoclase, pseudoleucite, a small amount of olivine and clinopyroxene of variable composition (diopside, aegirine-augite). Calcite is present in the fine-grained matrix and apatite is a usual accessory.

Age: 
Neogene.
References: 

GAPEYEVA, G.M. 1971. Petrology of the Neogene-Quaternary basaltoids from the northwest section of the Pacific belt.
ZALISHCHAK, N.L. 1969. The Koksharovsky massif of ultrabasic and alkaline rocks (South Primorye). Nauka, Moscow. 116 pp.

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