Khingan-Okhotsk volcanic-plutonic belt 

(Cretaceous) 

(Northern part of Russian Southeast, units Kvi, Kpf)

Consists of a chain of volcanic fields of similar age, lithology, and stratigraphy. Divided into two main 
sequences: (1) Barremian to Cenomanian andesite and minor basalt, with coeval gabbro, diorite, and 
granodiorite. Andesite exhibits calc-alkalic composition, whereas basalt exhibits tholeiitic composition. 
And (2) Late Cretaceous (mainly pre-Senonian) suite of K-rich felsic volcanic rocks, tuff, ignimbrite, and 
coeval subvolcanic intrusive and granitic rocks. Belt overlies Turan and Malokhingask terranes of Bureya 
superterrane, and Badzhal and Ulban terranes. The belt is interpreted as a magmatic arc tectonically paired 
to the Early Cretaceous accretionary-wedge and subduction-zone complexes of the Khabarovsk, Amur 
River, and Kiselevka-Manoma terranes. REFERENCES: Sukhov, 1975; Scheglov, 1984; Natal’in, 1991, 
1993.