Alkaline Rocks and Carbonatites of the World

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

Ingurskii

stripes

Occurrence number: 
136-03-034
Country: 
Russia
Region: 
Vitim subprovince
Location: 
Longitude: 113.17, Latitude: 53.6
Carbonatite: 
No

This 140 km2 massif, like Sherbakhtinskii (No. 33), cuts early Proetrozoic metamorphic rocks and Palaeozoic granites and is partly covered by Neogene basalts. The intrusion is characterized by the concentric disposition of the rock units: biotite granite in the centre and peralkaline granites around the margin. The peralkaline granites occupy about 100 km2 and veins and dykes are abundant and include peralkaline granite pegmatites, granite porphyries and syenite porphyries. The peralkaline granites are coarse-grained, sometimes porphyritic and composed of alkali feldspar, quartz, aegirine and riebeckite.

Age: 
Geological evidence indicates a Permian-Triassic age.
References: 

ZANVILEVICH, A.N., LITVINOVSKY, B.A. and ANDRE’E V, G.V. 1985. The Mongolian-Transbaikalian alkali-granitoid province (geology and petrology). Nauka, Moscow. 232 pp.

Map: 
Fig. 2_202. Sherbakhtinskii (1) and Ingurskii (2) (after Zanvilevich et al., 1985, Fig. 2.10).
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith