PORPHYRY CU-MO-(AU) MINERALIZATION: THE AGE AND RELATIONSHIP WITH IGNEOUS ROCK COMPLEXES OF THE BORGULIKAN ORE FIELD ( UPPER-AMUR REGION )
V.I. Sotnikova, A.A. Sorokinb, V.A. Ponomarchuka, V.O. Gimona, A.P. Sorokinb
a Institute of Geology and Mineralogy, Siberian Branch of the RAS,
3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
b Institute of Geology and Nature Management, Far East Branch of the RAS,
2 ul. B. Khmel'nitskogo, Blagoveshchensk, 675000, Russia
Keywords: Porphyry Cu-Mo-(Au) mineralization; 40Ar/39Ar dating; Borgulikan ore field; Amur region
Pages: 177-184
Abstract
The Borgulikan ore field is localized in the west of the Umlekan-Ogodzha volcanoplutonic belt made up of various igneous (upper-Amur granite-granodiorite (140-134 Ma), Burunda monzodiorite-granodiorite (130-127 Ma), and Taldan andesite (127-123 Ma)) and superposed (Early Cretaceous Gal'ka trachybasalt-rhyolite (119-115 Ma) and Late Cretaceous trachybasalt-trachyandesite (97-94 Ma)) complexes. 40Ar/39Ar dating of porphyry intrusions breaking through the Taldan volcanic complex and associated with Cu-Mo-(Au) mineralization yielded the following ages: early (dark)
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