Occurrence of SiC and Diamond Polytypes, Chromite and Uranophane in Breccia from Nickel Laterites (New Caledonia): Combined Analyses by Yassine El Mendili, Beate Orberger, Daniel Chateigner, Jean-François Bardeau, Stéphanie Gascoin, Sébastien Petit, Olivier Perez

“…Again, the SiC polymorph represent stable relicts from this dissolution process being deposited in breccia pores. Uranophane is a neoformed phase having crystallized from the silica rich aqueous solutions. …”
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Natural Radioactivity and Radiological Hazard Effects from Granite Rocks in the Gabal Qash Amir Area, South Eastern Desert, Egypt by Bahaa M. Emad, M. I. Sayyed, Hamoud H. Somaily, Mohamed Y. Hanfi

“…The radioactivity levels in the studied granite samples are due to the secondary alteration of radioactive-bearing minerals associated with cracks of granites (secondary minerals in muscovite granites are wolframite, uraninite, uranophane, beta-uranophane, autunite, xenotime, columbite, zircon, and monazite). …”
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Mineralogy and mineral chemistry of rare-metal pegmatites at Abu Rusheid granitic gneisses, South Eastern Desert, Egypt by Mohamed Fahmy Raslan, Mohamed A. Ali

“…The calculated formula of the studied fergusonite is A(Y0.303 ΣREE0.014 U0.135 Th0.063 Ca0.013 Pb0.006 Si0.213 Zr0.035 Hf0.048 Fe0.105)Σ0.935 B(Nb0.61 Ta0.084 Ti0.01)Σ0.704 O4.The presence of uraninite (high Th, and REE contents) and thorite, indicates that these minerals magmatic processes and followed by hydrothermal processes which are responsible for the precipitation of Nb-Ta multioxide minerals. Uranophane and kasolite of Abu Rusheid pegmatites are most probably originated from hydrothermalalterations of the primary uraninite. …”
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Uranium Mineralization in the MacInnis Lake Area, Nonacho Basin, Northwest Territories: Potential Linkages to Metasomatic Iron Alkali-Calcic Systems by Kerstin Landry, Erin Adlakha, Andree Roy-Garand, Anna Terekhova, Jacob Hanley, Hendrik Falck, Edith Martel

“…Chemical U-Th-Pb dating yields resetting ages of <875 ± 35 Ma for type-ii uraninite-uranophane, younger than strike-slip movement along regional structures of the basin that are spatially associated with the uranium occurrences. …”
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REE Concentrations in Secondary Uranium Minerals from the Izera Metamorphic Complex (SW Poland) by Marcin Daniel Syczewski, Rafał Siuda, Jan Parafiniuk

“…The secondary uranium mineralization from these locations consists of phosphates (meta-autunite, meta-torbernite, metauranocircite-I, saleéite, bassetite, phosphuranylite), arsenates (zeunerite), silicates (uranophane, sklodowskite), and uranyl hydroxides (likely becquerelite). …”
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Water-Rock Interaction and Potential Contamination Risk in a U-Enriched Area by Margarida Antunes, Rui Teixeira, Teresa Albuquerque, Teresa Valente, Paula Carvalho, António Santos

“…Mineralization occurs mainly in quartz veins with meta-torbernite and uranophane and some U-bearing minerals, cutting a Variscan granite. …”
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The Application of Electron Microprobe Dating Method on Uranium Minerals in Changjiang Granite, Northern Guangdong by ZHANG Long, CHEN Zhen-yu, TIAN Ze-jin, HUANG Guo-long

“…Uraninite is considered to be the main ore source provider of granite-hosted uranium deposits, it plays a significant role in mineralization assessment of granite and constraining the age of digenesis and uranium mineralization.Changjiang granite is a part of the Zhuguang Mountains, and is important U-bearing granite in the north of Guangdong.Uranium minerals in this granite are studied by Electron Microprobe.Results show that uranium minerals mainly fill in the spaces between minerals or are surrounded by pyrite.Uranium minerals are also found in quartz, biotite, chlorite and other minerals.The main types of uranium minerals are uraninite, pitchblende, uranothorite and uranophane.The chemical ages of uraninite and pitchblende dated by Electron Microprobe can be divided into three groups, 155 Ma, 106 Ma and 74 Ma.The first group represents the formation age of Changjiang granite mass, and the second and third groups represent multiple stages of uranium mineralization.From rock formation to about 106 Ma, the composition of uraninite has not changed significantly.Obvious U activation and migration did not happen until 74 Ma, so the main uranium mineralization of Changjiang granite may have occurred at about 74 Ma or later.…”
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Litsa uranium ore occurrence (Arctic zone of the Fennoscandian Shield): new results of petrophysical and geochemical studies by Vadim L. Il’chenko, Elena N. Afanasieva, Tatiana V. Kaulina, Lyudmila M. Lyalina, Elena A. Nitkina, Olga D. Mokrushina

“…Mineralogical studies show the following formation sequence of ore minerals: uraninite – sulfides – uranophane, coffinite, pitchblende. Two stages of uranium mineralization are distinguished: Th-U (1.85-1.75 Ga) and U (400-300 Ma). …”
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Spectroscopic identification of Ca-bearing uranyl silicates formed in C–S–H systems by Antonia S. Yorkshire, Martin C. Stennett, Brant Walkley, John L. Provis, Luke T. Townsend, Latham T. Haigh, Neil C. Hyatt, Lucy M. Mottram, Claire L. Corkhill

“…At moderate or high Ca/Si ratios, uranophane-type uranyl silicates or Ca-uranates dominated, while at the lowest Ca/Si ratios, the formation of a Ca-bearing uranyl silicate mineral, similar to haiweeite (Ca[(UO2)2Si5O12(OH)2]·3H2O) or Ca-bearing weeksite (Ca2(UO2)2Si6O15·10H2O) was identified. …”
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Geochemical Conditions and Factors Controlling the Distribution of Major, Trace, and Rare Elements in Sul Hamed Granitic Rocks, Southeastern Desert, Egypt by Neveen S. Abed, Mohamed G. El Feky, Atef El-Taher, Ehab El Sayed Massoud, Mahmoud R. Khattab, Mohammed S. Alqahtani, El Sayed Yousef, Mohamed Y. Hanfi

“…Petrographic investigations clarified that these rocks were affected by saussiritization, muscovitization, and silicifications as the main alteration types associated with uranium mineralization (uranophane and autunite). We carried out chemical analyses of our samples for major oxides and trace and rare earth elements using ICP-OES and ICP-MS. …”
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Genetic implications of Th/U, Th/K, and U/K ratios for U mineralizations: A case study from El-Missikat and El-Erediya shear zones, Eastern Desert, Egypt by Mahmoud Abdel-Hakeem, Mohamed El-Tahir, Ehab Abu Zeid, Hassan Rageh

“…Afterwards, the hydrothermal mineralization underwent some degrees of chemical weathering that resulted in supergene U mineralization whose fingerprints can be traced by the occurrence of secondary U minerals (e.g. kasolite and uranophane), Th/U ratios ≤ 0.1, and the weak correlation between Th/K and U/K (e.g. r = 0.39 and − 0.11).…”
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Natural Radionuclide Levels and Radiological Hazards of Khour Abalea Mineralized Pegmatites, Southeastern Desert, Egypt by Reham M. Abd El Rahman, Sherif A. Taalab, Zainab Z. Al Full, Mostafa S. Mohamed, M. I. Sayyed, Nouf Almousa, Mohamed Y. Hanfi

“…The high activity of the mineralized pegmatite is mainly attributed to the presence of uranium mineral (autunite), uranophane, kasolite and carnotite, thorium minerals (thorite, thorianite and uranothorite) as well as accessories minerals—such as zircon and monazite. …”
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Notable changes in geochemical and mineralogical characteristics of different phases of episyenitization: insights on the radioactive and shielding of the late phase by Sherif A. Taalab, Hesham M. H. Zakaly, Hesham M. H. Zakaly, Hesham M. H. Zakaly, V. Ivanov, Albandari W. Alrowaily, Hamdy A. Awad, Neveen S. Abed, Shams A. M. Issa, Shams A. M. Issa, Amira M. Eltohamy, Antoaneta Ene

“…The mineralizing fluids in the least and highly episyenitized granites are incorporated in some ore minerals like uranophane, fergusonite, bazzite and garnet. Notably, the presence of elements such as U, Th, and other heavy metals in Kab Amiri granites highlights the potential for these rocks in radiation shielding applications. …”
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Application of Automatic Mineral Analysis Technology to Identify Minerals and Occurrences of Elements in Sandstone-type Uranium Deposits in the Ordos Basin by ZHANG Ran, YE Li-juan, DANG Fei-peng, XIAO Zhi-bin, BI Jun-hui, ZHOU Jing, GUO Hu, XU Ya-wen, GENG Jian-zhen, ZHOU Hong-ying

“…RESULTS The minerals in the study were identified as coffinite, pitchblende, uraninite and uranophane. Pyrite and titanium oxide were closely related to uranium minerals, and other associated minerals were identified as quartz, rutile, feldspar, mica and kaolinite. …”
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Hochleitnerite, [K(H₂O)]Mn₂(Ti₂Fe)(PO₄)₄O₂(H₂O)₁₀&thinsp; ⋅ &thinsp;4H₂O, a new... by I. E. Grey, E. Keck, A. R. Kampf, C. M. MacRae, R. W. Gable, W. G. Mumme, N. C. Wilson, A. M. Glenn, C. Davidson

“…It was found in specimens of altered zwieselite, in association with fluorapatite, rockbridgeite, columbite and sub-micrometre rods of uranophane. Hochleitnerite occurs as isolated and intergrown pale-yellow, diamond-shaped tablets with thicknesses reaching 50 <span class="inline-formula">µ</span>m and lengths of 120 <span class="inline-formula">µ</span>m. …”
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