Results 21 to 30 of about 19,529 (228)
REE MINERALS IN BLACK SHALES OF THE PALEOPROTEROZOIC MIKHAILOVKA FORMATION (BAIKAL-PATOM HIGHLAND, SIBERIA) [PDF]
Минералогия, 2022 The paper characterizes REE mineralization from carbonaceous metapelites of the Paleoproterozoic Mikhailovka Formation, which is the most ancient gold-bearing horizon of the Lena province (Bodaibo district, Irkutsk region). The conditions of metamorphism
E.E. Palenova +3 more
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Internal framework and geochemistry of the Carboniferous Huaco granite pluton, Sierra de Velasco, NW Argentina [PDF]
, 2018 The A-type Huaco granite pluton of the Velasco range (Sierras Pampeanas of northwest Argentina) is formed by three coeval granitic facies and contains subordinate coeval-to-late facies, as well as enclaves, dikes and stocks that show different temporal ...
Grosse, Pablo +3 more
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Yankuang ceshi, 2022 BACKGROUND The Changjiang uranium ore field in the southern margin of the Zhuguangshan complex pluton is a typical granite-type uranium ore field in China. Zircon U-Pb dating has been used to date ore-bearing granites. However, due to the high content of
CHEN Yan +6 more
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Speculations Linking Monazite Compositions to Origin: Llallagua Tin Ore Deposit (Bolivia)
Resources, 2017 Monazite [(Ce,Th)PO4] from the Llallagua tin ore deposit in Bolivia is characterized by low radiogenic element contents. Previously reported field evidence and mineral associations suggest the mineral formed via direct precipitation from hydrothermal ...
Elizabeth J. Catlos, Nathan R. Miller
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Occurrence of Rare Earth, Iron, Phosphorus and Calcium in High Grade Rare Earth Concentrate
Kuangchan zonghe liyong, 2022 Rare earth grade of Bayan Obo mixed rare earth concentrate is 65.86%, and the contents of P2O5, CaO and TFe are 11.26%, 3.89% and 1.34%, respectively. Chemical analysis, automatic mineral analysis system, SEM and EDS were used to study the occurrence of ...
Na Li +3 more
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Pressure-induced phase transitions in AgClO4 [PDF]
, 2011 AgClO4 has been studied under compression by x-ray diffraction and density functional theory calculations. Experimental evidence of a structural phase transition from the tetragonal structure of AgClO4 to an orthorhombic barite-type structure has been ...
Beltran, A. +4 more
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Scientific Reports, 2023 Multi-heavy mineral separation techniques like density, magnetic, and electromagnetic techniques are followed by picking, grain counting, and mineralogical examinations conducted with an environmental scanning electron microscope (ESEM). These techniques
M. Awad +5 more
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REE-bearing minerals in Drava river sediments, Slovenia, and their potential origin
Geologija, 2017 Monazite and xenotime are major ore minerals for rare earth elements (REE), Y, and actinides, a powerful tool for radiometric dating and indicators of the geological genesis of the parent rock.
Aleš Šoster +3 more
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Radiological assessment of different monazite grades after mechanical separation from black sand
Scientific Reports, 2023 In Egyptian black sands, monazite is a precious mineral characterized by its composition, which includes crucial constituents such as thorium, trace amounts of uranium, and rare earth elements. It is essential to evaluate and quantify the extent of gamma-
N. A. kotb +2 more
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Phase Decomposition upon Alteration of Radiation-Damaged Monazite–(Ce) from Moss, Østfold, Norway
CHIMIA, 2010 The internal textures of crystals of moderately radiation-damaged monazite–(Ce) from Moss, Norway, indicate heavy, secondary chemical alteration.
Lutz Nasdala +8 more
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