Radiation damage and uranium concentration in zircon as assessed by Raman spectroscopy and neutron irradiation
-
A.E. Marsellos
and
J.I. Garver
Abstract
Radiation damage of natural and synthetic zircon grains is evaluated by Raman spectroscopy to understand annealing and stability of fission tracks. Analyses focus on a suite of 338 Paleozoic detrital zircon grains from metamorphosed strata in the Hellenic forearc that were variably annealed by a Miocene thermal event, as well as a suite of 97 synthetic zircon grains. The Raman wavenumber shift of ν3 [SiO4] reveals that radiation damage and damage distribution in this suite mainly depends on uranium concentration. In zircon with similar uranium concentration, the Raman wavenumber shift allows for the determination of radiation damage in different crystals, which is a function of effective accumulation time. Nine detrital zircons grains with moderate radiation damage were stepwise annealed at 1000 and 1400 °C, which resulted in progressive removal of radiation damage revealed in an increase of ν3 [SiO4] peak positions. For a partly reset sample that was brought to temperatures of ~350 °C in a geologic setting (Hellenic forearc), we use the Raman measurements and uranium determination to estimate a Zircon Damage Discrimination Factor (ZRDD), which is our attempt to estimate only radiation damage in single grains by accounting for affects of the uranium atom in the Raman wavenumber. This discrimination allows for a separation of zircon fission track (ZFT) ages of single ages based on grains that have a low track retention (high damage, fully reset grain), thus refining the age determination of cooling in a rock that shows variable resetting.
© 2015 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
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- Elbrusite-(Zr)—A new uranian garnet from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia
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- Protracted oceanic subduction prior to continental subduction: New Lu-Hf and Sm-Nd geochronology of oceanic-type high-pressure eclogite in the western Dabie orogen
- Time-resolved in situ studies of apatite formation in aqueous solutions
- X-ray Rietveld and 57Fe Mössbauer studies of epidote and piemontite on the join Ca2Al2Fe3+Si3O12(OH)–Ca2Al2Mn3+Si3O12(OH) formed by hydrothermal synthesis
- Elastic behavior of zeolite boggsite in silicon oil and aqueous medium: A case of high-pressure-induced over-hydration
- Low-temperature infrared spectroscopic study of OH-stretching modes in kaolinite and dickite
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- Crystal chemistry of chromian pumpellyite from Osayama, Okayama Prefecture, Japan
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- The structure of schwertmannite, a nanocrystalline iron oxyhydroxysulfate
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- The behavior of the Hf isotope system in radiation-damaged zircon during experimental hydrothermal alteration
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Articles in the same Issue
- Resonant X-ray emission study of the lower-mantle ferropericlase at high pressures
- Uranyl phosphate sheet reconstruction during dehydration of metatorbernite [Cu(UO2)2(PO4)2·8H2O]
- Detection of structurally bound hydroxyl in fluorapatite from Apollo Mare basalt 15058,128 using TOF-SIMS
- Quantum-mechanical evaluation of Np-incorporation into studtite
- Electronic structure and local environment of substitutional V3+ in grossular garnet Ca3Al2(SiO4)3: K-edge X-ray absorption spectroscopy and first-principles modeling
- Elbrusite-(Zr)—A new uranian garnet from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia
- What drives the distribution in nature of 3T vs. 2M1 polytype in muscovites and phengites? A general assessment based on new data from metamorphic and igneous granitoid rocks
- Radiation damage and uranium concentration in zircon as assessed by Raman spectroscopy and neutron irradiation
- The Cr X-ray absorption K-edge structure of poorly crystalline Fe(III)-Cr(III)-oxyhydroxides
- Protracted oceanic subduction prior to continental subduction: New Lu-Hf and Sm-Nd geochronology of oceanic-type high-pressure eclogite in the western Dabie orogen
- Time-resolved in situ studies of apatite formation in aqueous solutions
- X-ray Rietveld and 57Fe Mössbauer studies of epidote and piemontite on the join Ca2Al2Fe3+Si3O12(OH)–Ca2Al2Mn3+Si3O12(OH) formed by hydrothermal synthesis
- Elastic behavior of zeolite boggsite in silicon oil and aqueous medium: A case of high-pressure-induced over-hydration
- Low-temperature infrared spectroscopic study of OH-stretching modes in kaolinite and dickite
- Stability field of the high-temperature orthorhombic phase in the enstatite-diopside system
- Unique crystal chemistry of two polymorphs of topaz-OH: A multi-nuclear NMR and Raman study
- Crystal chemistry of chromian pumpellyite from Osayama, Okayama Prefecture, Japan
- Toturite Ca3Sn2Fe2SiO12—A new mineral species of the garnet group
- The structure of schwertmannite, a nanocrystalline iron oxyhydroxysulfate
- Crystal chemistry of Cr-spinels from the lherzolite mantle peridotite of Ronda (Spain)
- Lead-tellurium oxysalts from Otto Mountain near Baker, California: I. Ottoite, Pb2TeO5, a new mineral with chains of tellurate octahedra
- Lead-tellurium oxysalts from Otto Mountain near Baker, California: II. Housleyite, Pb6CuTe4O18(OH)2, a new mineral with Cu-Te octahedral sheets
- The behavior of the Hf isotope system in radiation-damaged zircon during experimental hydrothermal alteration
- Letter. Crystal structure of a new high-pressure polymorph of topaz-OH
- Letter. In situ 238U-230Th disequilibrium dating of pyrochlore at sub-millennial precision
