 | | Journal (article/letter/editorial) | | Minerals: a Case Study of Chauli Deposits, Chatkal–Qurama District, Uzbekistan I. V. Chernyshev*, V. N...resulting in transformation of uranium ores during deposit history but also calculation of age of these processes...assumptions. Galena from the Chauli deposit in the Chatkal–Qurama district, Uzbekistan, a typical representative...for the Chauli deposit, the age of epigenetic transformation of uranium ores of this deposit has been...into galena. The obtained date is 170 Ma. In the Chatkal–Qurama district, these epigenetic processes are |  | | Journal (article/letter/editorial) | | performed using 0.02–0.04mg microsamples of uraninite, pitchblende, and coffinite, which were locally...values obtained for 50 samples of Ubearing minerals range from 137.703 to 137.821, with a 0.86‰ difference...238U/235U value of 137.773 ± 0.056 (±2SD). The range of 238U/235U variations in seven deposits with ura...U(IV)bearing solid phase in the heavy isotope 238U. The range of 238U/235U ratios for 11 hydrothermal (hightemperature)...703–137.821) lies well within the broader (twofold) range of values determined for the lowtemperature deposits |  | | Journal (article/letter/editorial) | | quartz, calcite, and fluorite. The temperature range most favorable for the origin of U deposits is 100–200°C...937 measured temperature values fall within this range), which makes U deposits remarkably different from...also differ in the salinity of the fluids. The range of fluid salinity of 10–30 wt % equiv. NaCl includes...density: 94% of all measured values lie within the range of 0.8–1.2 g/cm3. Fluid pressure at U deposits broadly...Russia, Ukraine, and Kazakhstan. (a–c) Druzhnoe deposit, Aldan, Russia (a, b—quartz, c—barite; homogenization |  | | Book | | of other geoscientists who worked on any given deposit, in order to stimulate and encourage further research.... . . . . . . . . . . . . . . 397 Chapter 15 Uzbekistan . . . . . . . . . . . . . . . . . . . . . . ...conflicting. Descriptions of the same district or deposit or specific features thereof by different authors...geological situation and size of a district or deposit. It has to be admitted, however, that this demanding...have contributed work to the country, district or deposit described in that particular chapter. This scheme |
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