stripes
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.
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.