Results 1 to 10 of about 79 (76)
Metamictization of zircon: Raman spectroscopic study [PDF]
Journal of Physics Condensed Matter, 2000 Raman spectroscopy of radiation-damaged natural zircon samples shows increased line broadening and shifts of phonon frequencies with increasing radiation dose. Stretching and bending frequencies of SiO4 tetrahedra soften dramatically with increasing radiation damage. The frequency shifts can be used to determine the degree of radiation damage.
Ian Farnan, Rodney Ewing
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Petrology and Zircon morphology of granitoid rocks at um Bogma Environs, south west Sinai, Egypt [PDF]
Delta Journal of Science, 2023 This paper studies the morphology of zircon crystals as well as geological and petrographical characteristics of granitoid rocks at Um Bogma environs, south Sinai, Egypt to provide the rock nomenclatures and to deduce their origin and magma types.
tarek hagag
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Chemical abrasion: the mechanics of zircon dissolution [PDF]
Geochronology, 2023 Chemical abrasion is a technique that combines thermal annealing and partial dissolution in hydrofluoric acid (HF) to selectively remove radiation-damaged portions of zircon crystals prior to U–Pb isotopic analysis, and it is applied ubiquitously to ...
A. J. McKanna +4 more
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Composition of metamict zircon from Mozambique [PDF]
Bulletin of the Geological Society of Finland, 1982 Nine specimens of metamict zircon from granite pegmatites of the district of Zambézia, Mozambique, have been analyzed by wet chemical methods and by X-ray fluorescence.
R. Törnroos
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Yankuang ceshi, 2016 Alpha dose matrix effect is the discrepancy of ablation rate and down-hole fractionation induced by the difference of crystal damage degree (alpha dose) between standard zircons and sample zircons. It has been proved to be the cause of systematic bias of
WANG Jia-song +3 more
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Columbite-Group Minerals from New York Pegmatites: Insights from Isotopic and Geochemical Analyses
Geosciences, 2018 Columbite crystals from niobium-yttrium-fluorine (NYF) pegmatites lacking zircon or containing metamict cyrtolite were analyzed for major and minor elements (Electron Microprobe (EMP)), trace elements (Laser Ablation-Inductively Coupled Plasma-Mass ...
Marian V. Lupulescu +4 more
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Anais da Academia Brasileira de Ciências, 2009 Since 1964, the Center for Geochronological Research - CPGeo, one of the interdepartmental centers of the Instituto de Geociências (IG) of São Paulo University, has developed studies related to several geological processes associated with different rock ...
Cláudia R. Passarelli +5 more
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Structural Characterization of Natural and Processed Zircons with X-Rays and Nuclear Techniques
Advances in Condensed Matter Physics, 2017 In ceramic industry, zircon sand is widely used in different applications because zirconia plays a role as common opacifying constituent. In particular, it is used as a basic component of glazes applied to ceramic tiles and sanitary ware as well as an ...
Laura C. Damonte +7 more
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Origin, Nature, and Crystallization Conditions of the Dacitic Magma Hosting the Koushk Zn-Pb Deposit, NE Bafq: Based on zircon crystal morphology, mineralogical evidence, and whole-rock geochemical [PDF]
پترولوژیIntroductionThe Kushk Pb–Zn deposit in northeastern Bafq, Central Iran, is associated with Neoproterozoic–Early Cambrian magmatism related to the Proto-Tethyan continental arc system.
Kiamars Hosseini +2 more
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NEW DATA ON PYROCHLORE OF ALKALI PEGMATITES AND ORE ZONES OF THE VISHNEVYE MOUNTAINS (SOUTHERN URALS) [PDF]
Минералогия, 2018 The minerals of the pyrochlore group are abundant in rocks of the Vishnevogorsk alkaline complex – miaskites, mica rocks, carbonatites, and their pegmatites. Several generations of pyrochlore can be found in complex pegmatite bodies.
V.I. Popova +3 more
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