The paper presents the results of fuid inclusion study of auriferous and barren quartz veins of the Krasnoe gold deposit situated in the bodaybo area (Irkutsk oblast) using thermo- and criometry, Raman spectroscopy and gas chromatography. The auriferous and barren quartz veins were formed from Mg-Na and K-Na chloride fuids with salinity of 6.3-10.6 and 7.3-13.9 wt. % NaCl-equiv. at temperature 260-330 and 140-280 °с, respectively, and pressure 1.2-1.6 kbar. Carbon dioxide (up to 98 mol. %) is the main component of the fuid followed by H2O and N2. The O isotopic composition of quartz both from auriferous and barren veins (δ18О 18.5-19.3 %°), as well as the calculated δ18О values of the fuid (δ18OH2O 9.82-12.30 ‰), correspond to those of metamorphic rocks and fuids.

Figures 7. Tables 3. References 53.

Key words: black shale-hosted gold deposits, bodaybo region, Krasnoe deposit, fuid inclusions, quartz.

N.N. Ankusheva,  Institute of Mineralogy UB RAS, Miass, Chelyabinsk region, 456317 Russia; South-Urals State University, Miass branch, ul. 8 Iyulya 10, Miass, Chelyabinsk region, 456316 Russia ankusheva@mail.ru

E.E. Palenova, Institute of Mineralogy UB RAS, Miass, Chelyabinsk region, 456317 Russia

E.A. Pankrushina, Institute of Geology and Geochemistry UB RAS, Ekaterinburg, 620016 Russia

S.N. Shanina, Institute of Geology KSC UB RAS, ul. Pervomayskaya 54, Syktyvkar, 167000 Russia

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