Аннотация:The Chiney pluton is unique in distinct layering and
rhythmic structure in Russia. It contains enormous vanadium
resources (up to 30 Gt of ore) and PGE-Cu-Ni. The
ores related to the Chiney intrusion differ from the ores of
other Cu-Ni deposits in their high Cu/Ni ratio (~100). Its
age is estimated as 1880–1850 Ma. It consists of the
Western, Central, Eastern, and Southeastern blocks. Four
main groups of intrusive rocks were recognized within the
Chiney pluton, with two types of layering:(1) sharply
bound isomodal layers, forming sandwiched leucocratic
and melanocratic rocks (usually anorthosite and titanomagnetite
gabbro and melagabbro), and (2) density-graded
layers with titanomagnetite and/or pyroxene near
the base. Maximum thickness of gabbro rocks has been
estimated as 2.5 km. Internal structure and distribution of
major components have been studied in the vertical
sequence of the pluton. Composition of rock-forming
minerals varies in separate rhythms but not in sequence.