Mineralogy and origin of surficial uranium deposits hosted in travertine and calcrete from central Jordan

Khoury, Hani; Salameh, Elias; Clark, Ian D.

doi:10.1016/j.apgeochem.2014.02.005

Cited by 42 publications

(61 citation statements)

References 27 publications

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“…Outcrops in central Jordan illustrate the presence of three main rock types: Bituminous marl; varicolored marble (pyrometamorphic rocks); travertine and top soil. The Bituminous Marl Unit overlies the Phosphorite Unit and underlies the varicolored marble and all are of Maestrichtian-Lower Paleocene age (Barjous, 1986;Blake & Ionides, 1939;Burdon, 1959;Jaser, 1986;Khoury et al, 2014;Quennel, 1956). In central Jordan, unusual redox-sensitive elements (RSE) cover large areas and are mainly associated with the varicolored marble, Pleistocene-Recent travertine and top soil.…”

Section: Geology Of Central Jordanmentioning

confidence: 99%

“…In central Jordan, unusual redox-sensitive elements (RSE) cover large areas and are mainly associated with the varicolored marble, Pleistocene-Recent travertine and top soil. Yellow uranium encrustations and green Cr-rich smectites are also associated Barjous, 1986;Jaser, 1986;Khoury et al, 2014). (D) Simplified geologic section of central Jordan.…”

Section: Geology Of Central Jordanmentioning

confidence: 99%

“…with the varicolored marble (pyrometamorphic rocks) and the underlying bituminous marl (oil shale) and phosphorites 9 (Khoury, 2006;Khoury & Abu-Jayyab, 1995;Khoury et al, 1984Khoury et al, , 2014. The mineralogy of surficial top soil in central Jordan and RSE source rocks, transport conditions, and deposition processes were explained in detail by Khoury et al (2014).…”

Section: Geology Of Central Jordanmentioning

confidence: 99%

“…Bzour et al (2016) have investigated the potential mobilization and accumulation of Cr, V and U in wild plants in Siwaqa area/Central Jordan and the results have indicated that the highest TF for U is (0.25) and is recorded in Onopordum transjordanicum. Top soils of Central Jordan are enriched in redox sensitive trace elements such as U, Cr, Zn, Cr, Ni, Cu, Co, As, and Cd in the form of sulphides and selenides Khoury, 2012;Khoury et al, 2014Khoury et al, , 2015Techer et al, 2006). The highest concentrations of trace elements from Central Jordan are present in the altered marble, chalk marl/travertine, and top soil Khoury, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Recent work on central Jordan has indicated that redox sensitive elements are present in the structure of high and low temperature minerals and are adsorbed by the organic matter. of the parent bituminous rocks Khoury et al, 2014Khoury et al, , 2015Khoury et al, , 2016Techer et al, 2006). Heavy metals such as U, Cd, As, Cr, Pb, Ni, Zn and V are also enriched in the phosphate rocks of Central Jordan (Abed et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Uptake of Some Toxic Elements by Wild Plants in Siwaqa Area/Central Jordan

Bzour

Khoury

Oran

2017

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Section: Geology Of Central Jordanmentioning

confidence: 99%

Section: Geology Of Central Jordanmentioning

confidence: 99%

Section: Geology Of Central Jordanmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Uptake of Some Toxic Elements by Wild Plants in Siwaqa Area/Central Jordan

Bzour

Khoury

Oran

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Uranium enrichment associated with geothermal alteration: An example from Rehai, Tengchong volcanic area of China

2022

Geological Journal

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For the continental rift‐related geothermal system, the hydrothermal alteration zones are rarely studied for uranium exploration. High uranium concentrations (up to 36 ppm) are shown in the altered sandstones at the Rehai geothermal field (RHGF) in Tengchong, China. To demonstrate the uranium enrichment mechanism, this study comparatively examines the trace element (uranium in particular) and rare earth element (REE + Y) concentrations of hot spring water, spring deposits (sinters and sulphates), and altered host sandstones from the RHGF of the Tengchong volcanic area. Along the central north‐south trending fault at Rehai, sinters and sulphates are precipitated from hot spring water, and the Neogene sandstones have been altered by hydrothermal fluids into zones formed of various clay minerals. The δD and δ18O values for the hot spring water indicate that the geothermal water originates from meteoric water. The spring water and hot spring deposits have identical REE distribution patterns which are featured with heavy REE (HREE) enrichment and negative Eu anomalies. Among the hot spring deposits, the yellowish earthy aggregates (tamarugite) deposited at the acidic Zhenzhu Spring have the maximum U concentration (27 ppm). The altered sandstones at Rehai, however, display the highest U concentrations (14–36 ppm). The U enrichment in the hot spring deposits and altered host rocks at the Rehai geothermal field is probably related to the multiple cycles of uranium leaching from granites, transportation upward along fault structures by geothermal water, decompression, and fixation in the hot spring deposits and/or alteration products. The results indicate that alteration zones associated with geothermal systems are also potential targets for uranium exploration.

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Characterization of Naturally Occurring Radioactive Material (NORM) Generated from the Lower Cretaceous Carbonate Formations in the Arabian Peninsula and Gulf

Arneodo

Balata

Benabderrahmane

et al. 2020

Berg Huettenmaenn Monatsh

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For most of the petroleum reservoirs in the world, the impact of the mother nuclides such as uranium-238 on the deposition of radioactive materials a.k.a. NORM from the formation and particularly as mineral scales adherent to tubulars and other equipment is considered insignificant. Uranium is regarded as insoluble in the reservoir formation and the prevailing understanding is that dissolved radium is not generated necessarily by U and Th in solution. Consequently, “uranium scale”, as a technical term, seems to be non-existent in the oil and gas industry. However, gamma spectroscopy and chemical analysis of NORM scale samples of carbonate origin, performed in the course of this research, has proven that they actually can contain uranium. A fundamental relationship between uranium and vanadium in scales is presumed. The highest specific activity of 238U in scale analyzed with gamma spectroscopy was at 11.4 [Bq/g] and supplementary chemical analysis has shown concentrations of up to 740 ppm total uranium and up to 260 ppm vanadium.

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Mineralogy and origin of surficial uranium deposits hosted in travertine and calcrete from central Jordan

Cited by 42 publications

References 27 publications

Uptake of Some Toxic Elements by Wild Plants in Siwaqa Area/Central Jordan

Uptake of Some Toxic Elements by Wild Plants in Siwaqa Area/Central Jordan

Uranium enrichment associated with geothermal alteration: An example from Rehai, Tengchong volcanic area of China

Characterization of Naturally Occurring Radioactive Material (NORM) Generated from the Lower Cretaceous Carbonate Formations in the Arabian Peninsula and Gulf

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