Chromite placer occurrences of the Volga-Ural basin – genesis, sources and industrial potential

Georesursy

Antonina V. Grigor’eva¹  Alexander V. Lalomov²  Ildar R. Rakhimov³ 

[1] Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry of Russian Academy of Sciences;Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry of the Russian Academy of Sciences;Institute of Geology of the Ufa Federal Research Centre of the Russian Academy of Sciences;

关键词: chromites;    placer deposits;    strategic metals;    volga-ural basin;   

DOI  :  10.18599/grs.2021.3.17

来源: DOAJ

【 摘 要 】

Chromium is a strategic metal, but more than a half of Russia’s needs are met by imports, so new deposits of chromites, including unconventional placer deposits, are of industrial and scientific interest. Previous studies and current works of the authors of the article have established the chromite placer metal content of Permian-Jurassic deposits of the Volga-Ural basin, which has industrial and potential significance: within the Lukoyanovsky placer area (Nizhny Novgorod region), the industrial chromite content of Jurassic coastal-marine titanium-zirconium placers has been established; in the south-west of Bashkiria, chromite-bearing sands (Sabantuy occurrence) with increased contents, but not yet clear industrial potential. The study of the typomorphism of chromites indicate their close relationship with the chrome spinel of ophiolite associations. The assumed overthrust structure of chromite-bearing hyperbasites of the Urals suggests a wide distribution of chromite-bearing sands within the Upper Permian-Jurassic Volga-Ural paleobasin, in which the increased content of chromites was controlled by hydro- and lithodynamic conditions favorable for placer formation. Questions of the genesis of chromite placer occurrences in the Ural part of the East European Platform, their distribution and primary sources need further study.

【 授权许可】

Unknown