Open AccessPHYSICAL-CHEMICAL FORMATION CONDITIONS OF URANIUM-TITANIUM-METAGEL MINERALIZATION AT THE GOLD-URANIUM ELKON DEPOSIT
Author(s) -
Mariya Komarova,
Вл. Б. Комаров,
А. П. Алешин,
Т. Л. Крылова
Publication year - 2017
Publication title -
izvestiâ vysših učebnyh zavedenij. geologiâ i razvedka
Language(s) - English
Resource type - Journals
eISSN - 2618-8708
pISSN - 0016-7762
DOI - 10.32454/0016-7762-2017-5-52-57
Subject(s) - uranium , mineralization (soil science) , hydrothermal circulation , chloride , mineralogy , uranium ore , geology , geochemistry , precipitation , fluid inclusions , salinity , carbonate , titanium , metallurgy , materials science , oceanography , physics , seismology , meteorology , soil science , soil water
A wide range of the temperatures of hydrothermal fluid regime (430-103 °C) has been revealed in the result of microthermometric study of the fluid inclusions in the minerals of pre-ore and post-ore stages developed at the Elkon deposit. Average temperatures, as well as the temperature variation are similar for both pre-ore and post-ore stages. It allows sure determination of temperatures of uranium ore formation as 400-120 °C. Fluids possessed Na-chloride, rarely Na-chloride-carbonate composition and moderate salinity (6-16 wt. % · NaCl equiv.). The wide range of tem-peratures confirms an assumption made before that various temperatures were the reason of formation of uranium mineralization both in the form of predominantly amorphous phase (U-Ti-metagel), as well as the rarely crystalline form (brannerite). Abrupt temperature decrease was apparently the main factor of the ore precipitation.