Geology of Ore Deposits

, Volume 54, Issue 7, pp 580–588 | Cite as

High-alumina titanite in mineral assemblages of the Berezitovy gold-base-metal deposit, Upper Amur Region

  • A. S. Vakh
  • O. V. Avchenko
  • A. A. Karabtsov
  • V. A. Stepanov
Minerals and Parageneses of Minerals


Grothite—a rare Al- and F-rich variety of titanite—was identified in two different gold-bearing mineral assemblages of the Berezitovy gold-base-metal deposit, Upper Amur Region, Russian Far East. Grothite is associated with quartz, orthoclase, chlorite, muscovite, tourmaline, almandine-spessartine garnet, ilmenite, pyrophanite, magnetite, fluorapatite, and sulfides. Grothite forms numerous scattered lamellar aggregates 20–100 μm in size with a relatively homogeneous structure. The lamellae grow in chlorite or between chlorite and orthoclase. According to microprobe analyses, variations in major elements of grothite are as follows (wt %): 30.56–34.07 SiO2, 7.91–12.71 Al2O3, 22.83–28.29 TiO2, 23.55–29.21 CaO, 0.52–4.25 FeO, and 2.19–6.16 F. It is suggested that grothite appeared in the gold-bearing mineral assemblages of the Berezitovy deposit due to the specifics of the primary composition of the host rocks and physicochemical conditions of the fluid regime at the final stage of deposit formation.


Pyrite Chlorite Galena Tourmaline Titanite 
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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • A. S. Vakh
    • 1
  • O. V. Avchenko
    • 1
  • A. A. Karabtsov
    • 1
  • V. A. Stepanov
    • 2
  1. 1.Far East Geological Institute, Far East BranchRussian Academy of SciencesVladivostokRussia
  2. 2.Geotechnical Research Center, Far East BranchRussian Academy of SciencesPetropavlovsk-KamchatskiiRussia

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