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Mechanism of metamorphic zircon growth in a granulite-facies quartzite, Adirondack Highlands, Grenville Province, New York
-
William H. Peck
,
M.E. Bickford
Veröffentlicht/Copyright:
2. April 2015
Abstract
Granulite-facies quartzites from the Adirondack Highlands (Grenville Province, New York) contain accessory zircon with ubiquitous metamorphic overgrowths. Detrital zircon cores are resorbed, preserve various internal zoning styles and inclusions, and have ages of 1.3 to 2.7 Ga. These ages constrain the timing of deposition of the protolith sandstone and suggest that the Adirondack Highlands were proximal or part of Laurentia during deposition. Metamorphic overgrowths formed in the quartzites during the Shawinigan orogeny (1.20-1.14 Ga). The average volume of overgrowths in eight samples ranges from 62-87%, with a positive correlation between zircon growth and feldspar content (melt productivity during metamorphism). Melt volumes and Zr solubility were too small to allow the overgrowths to have formed in one dissolution-precipitation event. Crystal-size distributions suggest zircon coarsening by the dissolution of small crystals and Zr transfer via a partial melt, and thus zircon overgrowths date anatexis. These results have implications for provenance studies, as dissolution of small zircon grains and growth of new zircon could bias age spectra of metasedimentary rocks.
Keywords: Metamorphic zircon; quartzite; U-Pb geochronology; Ostwald ripening; Adirondack Highlands; Grenville Province
Received: 2010-3-5
Accepted: 2010-7-20
Published Online: 2015-4-2
Published in Print: 2010-11-1
© 2015 by Walter de Gruyter Berlin/Boston
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Schlagwörter für diesen Artikel
Metamorphic zircon;
quartzite;
U-Pb geochronology;
Ostwald ripening;
Adirondack Highlands;
Grenville Province
Artikel in diesem Heft
- Characterization of cation environments in polycrystalline forsterite by 25Mg MAS, MQMAS, and QCPMG NMR
- Structure of nanocrystalline phyllomanganates produced by freshwater fungi
- First-principles study on variation of lattice parameters of mullite Al4+2xSi2–2xO10–x (x = 0.125, 0.250, 0.375)
- Natrolite may not be a “soda-stone” anymore: Structural study of fully K-, Rb-, and Cs-exchanged natrolite
- Metal retention, mineralogy, and design considerations of a mature permeable reactive barrier (PRB) for acidic mine water drainage in Northumberland, U.K.
- A relationship between d104 value and composition in the calcite-disordered dolomite solid-solution series
- XRD, micro-XANES, EMPA, and SIMS investigation on phlogopite single crystals from Mt. Vulture (Italy)
- Volume behavior of the 10 Å phase at high pressures and temperatures, with implications for H2O content
- Interfacial tension between immiscible liquids in the system K2O-FeO-Fe2O3-Al2O3-SiO2 and implications for the kinetics of silicate melt unmixing
- H2O and the dehydroxylation of phyllosilicates: An infrared spectroscopic study
- Effects of intermediate range structure on the 29Si NMR chemical shifts of framework silicates: Results for analcime
- High-temperature Mössbauer spectroscopy: A probe for the relaxation time of Fe species in silicate melts and glasses
- The thermal equation of state of FeTiO3 ilmenite based on in situ X-ray diffraction at high pressures and temperatures
- OH species, U ions, and CO/CO2 in thermally annealed metamict zircon (ZrSiO4)
- Crystallographic and chemical constraints on the nature of the proustite–pyrargyrite solid-solution series
- Accurate μRaman characterization of reaction products at the surface of (bio)oxidized pyrite
- Determination of manganese valence states in (Mn3+, Mn4+) minerals by electron energy-loss spectroscopy
- AFM study of the epitaxial growth of brushite (CaHPO4·2H2O) on gypsum cleavage surfaces
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- Crystal structure of hydrous wadsleyite with 2.8% H2O and compressibility to 60 GPa
- Dehydration and rehydration processes in gmelinite: An in situ X-ray single-crystal study
- Characteristics of emission centers in alkali feldspar: A new approach by using cathodoluminescence spectral deconvolution
- Mechanism of metamorphic zircon growth in a granulite-facies quartzite, Adirondack Highlands, Grenville Province, New York
- Speciation and mixing behavior of silica-saturated aqueous fluid at high temperature and pressure
- A critical comment on Thy et al. (2009b): Liquidus temperatures of the Skaergaard magma
