Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya
Апстракт
During an investigation of the Jabal Eghei area in southern Libya and the production of geological maps on a scale of 1:250 000 (Tibesti sector, sheet Wadi Eghei NF 34-1 and NF 34-2), regional prospecting for mineral raw materials was performed. A radiometric survey of the observed targets at the sites indicated two significant uranium mineralizations in rhyolites, and some smaller ones in granites that are in close contact with rhyolites. Rhyolites are located in the central part of the investigated region. They cut through granite rocks. The first mineralization is in the central part of the rhyolite region, which is mostly composed of silificated rhyolites. The second one was discovered near the granite rhyolite contact zone, characterized by the presence of silicified breccia rocks. These findings were confirmed by laboratory measurements of more than seventy samples collected in the area, using high-resolution gamma-ray spectrometry. The concentrations of uranium in these minerali...zations were found to range from approx. 50 mg kg(-1) to more than 600 mg kg(-1). The latter value is about 240 times above the Earths average. Besides uranium, these measurements have also given concentrations of thorium and potassium. Additional geochemical analysis was performed on samples taken from locations where uranium anomalies were discovered using the ICP-MS technique, in which the concentrations of more than forty elements were determined. The uranium mineralizations are accompanied by increased contents of silver (up to 17 times), arsenic (up to 8 times), molybdenum (up to 50 times), mercury (up to 9 times), and lead (up to 14 times), with regards to the Clark values. These results warrant a continued investigation of this region because of potential interest in the discovery of nuclear mineral raw materials.
Кључне речи:
terrestrial radioactivity / Jabal Eghei / gamma-ray spectrometry / uranium / mineralization / geological mapИзвор:
Journal of the Serbian Chemical Society, 2013, 78, 5, 741-758
DOI: 10.2298/JSC120919124K
ISSN: 0352-5139
WoS: 000320070800013
Scopus: 2-s2.0-84879669254
Колекције
Институција/група
VinčaTY - JOUR AU - Kovacevic, Jovan AU - Tereesh, Mehdi Bashir AU - Radenković, Mirjana AU - Miljanić, Šćepan S. PY - 2013 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5537 AB - During an investigation of the Jabal Eghei area in southern Libya and the production of geological maps on a scale of 1:250 000 (Tibesti sector, sheet Wadi Eghei NF 34-1 and NF 34-2), regional prospecting for mineral raw materials was performed. A radiometric survey of the observed targets at the sites indicated two significant uranium mineralizations in rhyolites, and some smaller ones in granites that are in close contact with rhyolites. Rhyolites are located in the central part of the investigated region. They cut through granite rocks. The first mineralization is in the central part of the rhyolite region, which is mostly composed of silificated rhyolites. The second one was discovered near the granite rhyolite contact zone, characterized by the presence of silicified breccia rocks. These findings were confirmed by laboratory measurements of more than seventy samples collected in the area, using high-resolution gamma-ray spectrometry. The concentrations of uranium in these mineralizations were found to range from approx. 50 mg kg(-1) to more than 600 mg kg(-1). The latter value is about 240 times above the Earths average. Besides uranium, these measurements have also given concentrations of thorium and potassium. Additional geochemical analysis was performed on samples taken from locations where uranium anomalies were discovered using the ICP-MS technique, in which the concentrations of more than forty elements were determined. The uranium mineralizations are accompanied by increased contents of silver (up to 17 times), arsenic (up to 8 times), molybdenum (up to 50 times), mercury (up to 9 times), and lead (up to 14 times), with regards to the Clark values. These results warrant a continued investigation of this region because of potential interest in the discovery of nuclear mineral raw materials. T2 - Journal of the Serbian Chemical Society T1 - Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya VL - 78 IS - 5 SP - 741 EP - 758 DO - 10.2298/JSC120919124K ER -
@article{ author = "Kovacevic, Jovan and Tereesh, Mehdi Bashir and Radenković, Mirjana and Miljanić, Šćepan S.", year = "2013", abstract = "During an investigation of the Jabal Eghei area in southern Libya and the production of geological maps on a scale of 1:250 000 (Tibesti sector, sheet Wadi Eghei NF 34-1 and NF 34-2), regional prospecting for mineral raw materials was performed. A radiometric survey of the observed targets at the sites indicated two significant uranium mineralizations in rhyolites, and some smaller ones in granites that are in close contact with rhyolites. Rhyolites are located in the central part of the investigated region. They cut through granite rocks. The first mineralization is in the central part of the rhyolite region, which is mostly composed of silificated rhyolites. The second one was discovered near the granite rhyolite contact zone, characterized by the presence of silicified breccia rocks. These findings were confirmed by laboratory measurements of more than seventy samples collected in the area, using high-resolution gamma-ray spectrometry. The concentrations of uranium in these mineralizations were found to range from approx. 50 mg kg(-1) to more than 600 mg kg(-1). The latter value is about 240 times above the Earths average. Besides uranium, these measurements have also given concentrations of thorium and potassium. Additional geochemical analysis was performed on samples taken from locations where uranium anomalies were discovered using the ICP-MS technique, in which the concentrations of more than forty elements were determined. The uranium mineralizations are accompanied by increased contents of silver (up to 17 times), arsenic (up to 8 times), molybdenum (up to 50 times), mercury (up to 9 times), and lead (up to 14 times), with regards to the Clark values. These results warrant a continued investigation of this region because of potential interest in the discovery of nuclear mineral raw materials.", journal = "Journal of the Serbian Chemical Society", title = "Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya", volume = "78", number = "5", pages = "741-758", doi = "10.2298/JSC120919124K" }
Kovacevic, J., Tereesh, M. B., Radenković, M.,& Miljanić, Š. S.. (2013). Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya. in Journal of the Serbian Chemical Society, 78(5), 741-758. https://doi.org/10.2298/JSC120919124K
Kovacevic J, Tereesh MB, Radenković M, Miljanić ŠS. Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya. in Journal of the Serbian Chemical Society. 2013;78(5):741-758. doi:10.2298/JSC120919124K .
Kovacevic, Jovan, Tereesh, Mehdi Bashir, Radenković, Mirjana, Miljanić, Šćepan S., "Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya" in Journal of the Serbian Chemical Society, 78, no. 5 (2013):741-758, https://doi.org/10.2298/JSC120919124K . .