Verkhoyansk collisional granite belt 

(Late Jurassic and Early Cretaceous)

(Southern and western parts of Russian Northeast, unit eKpf)

Consists chiefly of two major belts, Main collisional granite belt of Late Jurassic to early Neocomian age, 
and the Northern collisional granite belt of Neocomian age. Main collisional granite belt extends for about 
110 km along southwest border of the Kolyma-Omolon superterrane and stitches the superterrane to North 
Asian craton margin (unit NSV, Verkhoyansk fold belt). Occurs as inclined, sheet-like plutons, up to 200 
km long, that are generally conformable with major folds. Younger differentiates are biotite, two-mica, and 
amphibole-biotite granitic rocks. Ar-Ar ages of granitic rocks range from 134 to 144 Ma. The Northern 
collisional granite belt extends for about 600 km along northwestern margin of the Kolyma-Omolon 
superterrane. Belt consists of inclined sheet-like plutons, up to 200 km long, that are generally conformable 
with major folds. Major lithologies are tonalite, granodiorite, and, less commonly, two mica leucogranite. 
REFERENCES: Flerov and others, 1979; Sobolev and Kolesnichenko, 1979; Bakharev and others, 1988; 
Shkodzinsky and others, 1992; Parfenov, 1991; Hackett and others, 1992.