Alkaline Rocks and Carbonatites of the World

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

Terekhol

stripes

Occurrence number: 
136-08-022
Country: 
Russia
Region: 
East Tuva
Location: 
Longitude: 97.58, Latitude: 50.75
Carbonatite: 
No

Elongated approximately north-south the 3 km2 complex cuts Proterozoic marbles and granitized schists. It contains nepheline syenites in which marble xenoliths are preserved. The nepheline syenites vary from hastingsite-bearing varieties in the central part of the massif to augite-hedenbergite ones at the margins, but almost everywhere they are albitized. Albitite bodies with biotite, arfvedsonite, astrophyllite and various accessory minerals includingzircon, thorite, molybdenite and uraninite are common. In the vicinity of the contact marbles are changed to skarns and generally include diopside, biotite, and more rarely tremolite and cancrinite.

References: 

OSOKIN, E.D., LAPIN, A.V., KAPUSTIN, Yu.L., POHVISNEVA, E.A. and ALTUHOV, E.N. 1974. Alkaline provinces of Asia. Siberian-Pacific group. In L.S. Borodin (ed) Principal provinces and formations of alkaline rocks. 91-166. Nauka, Moscow.

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