Tereesh, Mehdi Bashir

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  • Tereesh, Mehdi Bashir (2)
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Author's Bibliography

Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya

Kovacevic, Jovan; Tereesh, Mehdi Bashir; Radenković, Mirjana; Miljanic, Scepan S.

(2013)

TY  - JOUR
AU  - Kovacevic, Jovan
AU  - Tereesh, Mehdi Bashir
AU  - Radenković, Mirjana
AU  - Miljanic, Scepan S.
PY  - 2013
UR  - http://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 Miljanic, Scepan S.",
year = "2013",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/5537",
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.,& Miljanic, S. S. (2013). Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya.
Journal of the Serbian Chemical Society, 78(5), 741-758.
https://doi.org/10.2298/JSC120919124K
Kovacevic J, Tereesh MB, Radenković M, Miljanic SS. Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya. Journal of the Serbian Chemical Society. 2013;78(5):741-758
Kovacevic Jovan, Tereesh Mehdi Bashir, Radenković Mirjana, Miljanic Scepan S., "Discovery of uranium mineralizations in the rhyolite-granite complex in the Jabal Eghei area of southern Libya" Journal of the Serbian Chemical Society, 78, no. 5 (2013):741-758,
https://doi.org/10.2298/JSC120919124K .
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Terrestrial radioactivity of the Jabal Eghei area in southern Libya and assessment of the associated environmental risks

Tereesh, Mehdi Bashir; Radenković, Mirjana; Kovacevic, Jovan; Miljanic, Scepan S.

(2013)

TY  - JOUR
AU  - Tereesh, Mehdi Bashir
AU  - Radenković, Mirjana
AU  - Kovacevic, Jovan
AU  - Miljanic, Scepan S.
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4371
AB  - Activity concentrations of main terrestrial radioisotopes Ra-226, Th-232 and K-40 were measured in geological samples collected in Libyas Jabal Eghei area, in order to contribute to the establishment of a baseline map of the environmental radioactivity levels and to estimate the associated environmental risk to the population. Activity concentrations ranged from 22 to 5256 Bq kg(1) for Ra-226, from 11 to 221 Bq kg(1) for Th-232 and from 132.0 to 2304 Bq kg(1) for K-40. Using these results, representative risk factors were calculated: the total absorbed gamma dose rate in air (ranged from 25.5 to 2434.3 nGy h(1) with a mean value of 251.8 nGy h(1)), the radium equivalent activity (555281 Bq kg(1), with the mean value of 537 Bq kg(1)), external hazard index (0.14914.24, with a mean value of 1.451) and annual outdoor effective dose (31.32985.4 Sv, with a mean value of 308.9 Sv). Accordingly, the radiation risk is above the world average, mainly as the consequence of discovered uranium anomalies.
T2  - Radiation Protection Dosimetry
T1  - Terrestrial radioactivity of the Jabal Eghei area in southern Libya and assessment of the associated environmental risks
VL  - 153
IS  - 4
SP  - 475
EP  - 484
DO  - 10.1093/rpd/ncs124
ER  - 
@article{
author = "Tereesh, Mehdi Bashir and Radenković, Mirjana and Kovacevic, Jovan and Miljanic, Scepan S.",
year = "2013",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4371",
abstract = "Activity concentrations of main terrestrial radioisotopes Ra-226, Th-232 and K-40 were measured in geological samples collected in Libyas Jabal Eghei area, in order to contribute to the establishment of a baseline map of the environmental radioactivity levels and to estimate the associated environmental risk to the population. Activity concentrations ranged from 22 to 5256 Bq kg(1) for Ra-226, from 11 to 221 Bq kg(1) for Th-232 and from 132.0 to 2304 Bq kg(1) for K-40. Using these results, representative risk factors were calculated: the total absorbed gamma dose rate in air (ranged from 25.5 to 2434.3 nGy h(1) with a mean value of 251.8 nGy h(1)), the radium equivalent activity (555281 Bq kg(1), with the mean value of 537 Bq kg(1)), external hazard index (0.14914.24, with a mean value of 1.451) and annual outdoor effective dose (31.32985.4 Sv, with a mean value of 308.9 Sv). Accordingly, the radiation risk is above the world average, mainly as the consequence of discovered uranium anomalies.",
journal = "Radiation Protection Dosimetry",
title = "Terrestrial radioactivity of the Jabal Eghei area in southern Libya and assessment of the associated environmental risks",
volume = "153",
number = "4",
pages = "475-484",
doi = "10.1093/rpd/ncs124"
}
Tereesh, M. B., Radenković, M., Kovacevic, J.,& Miljanic, S. S. (2013). Terrestrial radioactivity of the Jabal Eghei area in southern Libya and assessment of the associated environmental risks.
Radiation Protection Dosimetry, 153(4), 475-484.
https://doi.org/10.1093/rpd/ncs124
Tereesh MB, Radenković M, Kovacevic J, Miljanic SS. Terrestrial radioactivity of the Jabal Eghei area in southern Libya and assessment of the associated environmental risks. Radiation Protection Dosimetry. 2013;153(4):475-484
Tereesh Mehdi Bashir, Radenković Mirjana, Kovacevic Jovan, Miljanic Scepan S., "Terrestrial radioactivity of the Jabal Eghei area in southern Libya and assessment of the associated environmental risks" Radiation Protection Dosimetry, 153, no. 4 (2013):475-484,
https://doi.org/10.1093/rpd/ncs124 .
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