Introduction. Available information on the occurrences of high alkaline magmatic rocks fixing position western flanks southern branches (Gobi Altai and Gobi Tien-Shan) Central Asian Late Paleozoic continental rift system in territory North-West Chingiz (the eastern part Kazakhstan), Kendyktas-Chu-Ili-Bet-Pak-Dal uranium-bearing province Southern Kazakhstan Chatkal-Naryn zone Tien-Shan (Uzbekist...

Uranium contamination is a worldwide problem. Preventing uranium contamination in the environment is quite challenging and requires a thorough understanding of the microbiological, ecological and biogeochemical features of the contaminated sites. Bioremediation of uranium is largely dependent on reducing its bioavailability in the environment. In situ bioremediation of uranium by microbial proc...

Abstract Mineralogical study showed that the Yuejin uranium ore is from a low grade, high carbonate and pyrite sandstone type deposit. Uranium leaching rate, speciation of leachate, kinetics precipitation analysis were investigated under conditions different acidity, liquid–solid ratio H 2 O concentration. The test results weak acid process can be used to develop deposits, however, because cont...

In situ leaching (ISL) uranium mining technology is an in which the chemical solution injected into ore-bearing strata through drilling wells, and moves along ore bed by controlling hydraulic gradient of flow field reacts with to form uranium-bearing solution. To reduce dead angle process leaching, each pumping injection unit should achieve uniform at end production, appropriate mode be adopted...

From the early 1960’s to the late 80’s, extensive exploration for uranium ore took place in the former Yugoslavia, including Croatia (BRAUN, 1984). Prospecting activities by the Croatian Geological Survey identified several locations in the Slavonian Mts. (Croatia) with an increased level of radioactivity (BRAUN et al., 1983), particularly in the area of Mts. Psunj and Papuk. The Carbon age of ...

Bioleaching is the extraction of metals from their ores through the use of microorganisms. Inthis process, the use of native bacteria leads to achieve more yields of metals. So, in the presentstudy, native sulfur-oxidizing bacterium in potentiality of uranium extraction was isolated fromGhachin mine in Iran and identified by partial gene sequencing. For this purpose, the watersamples were colle...

We evaluated the capabilities of an in situ method for measuring copper isotopes of cubanite using UV-fs-LA-MC-ICP-MS. A comparison of the UV-fs laser results with those obtained from the NIR-fs laser system shows that there is obviously an improvement in the precision (<0.10‰, 2SE) when using the UV-fs laser. In both wavelength modes, matrix-matched standards are required for reliable in situ ...

This paper provides a review of the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Advanced Land Imager (ALI), and Hyperion data and applications of the data as a tool for ore minerals exploration, lithological and structural mapping. Spectral information extraction from ASTER, ALI, and Hyperion data has great ability to assist geologists in all disciplines to map the d...

Large amounts of uranium waste rocks and tailings resulting from the exploitation and treatment of uranium ore at the Northern Guangdong mine (South China) have been accumulated in dams (tailing ponds). To reduce the dispersion of natural radionuclides into the environment, some dams were revegetated with arbor, bush and sward. Besides these plants, Miscanthus floridulu is the dominant plant gr...