Startseite Zircon saturation and Zr diffusion in rhyolitic melts, and zircon growth geospeedometer
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Zircon saturation and Zr diffusion in rhyolitic melts, and zircon growth geospeedometer

  • Youxue Zhang EMAIL logo und Zhengjiu Xu
Veröffentlicht/Copyright: 3. Juni 2016
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American Mineralogist
Aus der Zeitschrift American Mineralogist Band 101 Heft 6

Abstract

Zircon is a ubiquitous accessory mineral in silicic igneous rocks. We have carried out new zircon dissolution experiments to refine our understanding of Zr diffusion and zircon solubility in several rhyolitic melts. Zr diffusivity depends strongly on temperature and H2O content, and weakly on pressure and anhydrous melt composition. The diffusion data for each individual melt follows the Arrhenius relation. The dependence of Zr diffusivity on temperature, pressure, and melt composition (including H2O content) is modeled for different rhyolitic melts in this study and for the combined literature and our data. Our data on Zr concentration at zircon saturation in silicic melts show strong dependence on temperature and weak dependence on pressure and melt composition, and are somewhat off the trend based on existing zircon solubility models. The dissolution or growth rate of a freely falling zircon crystal in a specific hydrous rhyolitic melt is modeled. The controlling factors are mostly the temperature and Zr concentration in the melt. Typical zircon growth rate in wet rhyolitic melt is 0.01 to 1.0 μm/yr. The size of zircon crystals can be used to place limit on the cooling rate of its hosting magma. The presence of large indigenous zircon crystals in Bishop Tuff requires slow cooling of the Bishop Tuff magma chamber.

Key words: Zirconium diffusion; Zr diffusivity; zircon solubility; zircon growth; zircon geospeedometer; cooling rate; Bishop Tuff; Invited Centennial article

Special collection information can be found at http://www.minsocam.org/MSA/AmMin/special-collections.html.

Acknowledgments

We thank James Mungall and an anonymous reviewer for insightful and constructive comments. This work was supported by U.S. NSF grants EAR-0838127, EAR-1019440, and EAR-1524473. The electron microprobe at the University of Michigan was purchased with NSF grant EAR-9911352.

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Received: 2015-6-12
Accepted: 2015-10-18
Published Online: 2016-6-3
Published in Print: 2016-6-1

© 2016 by Walter de Gruyter Berlin/Boston

Artikel in diesem Heft

  1. Invited Centennial Article
  2. On the nature and significance of rarity in mineralogy
  3. Special collection: mechanisms, rates, and timescales of geochemical transport processes in the crust and mantle
  4. Zircon saturation and Zr diffusion in rhyolitic melts, and zircon growth geospeedometer
  5. Review
  6. On silica-rich granitoids and their eruptive equivalents
  7. Special collection: advances in ultrahigh-pressure metamorphism
  8. Discovery of in situ super-reducing, ultrahigh-pressure phases in the Luobusa ophiolitic chromitites, Tibet: new insights into the deep upper mantle and mantle transition zone
  9. Special collection: from magmas to ore deposits
  10. Uraninite from the Olympic Dam IOCG-U-Ag deposit: linking textural and compositional variation to temporal evolution
  11. Special collection: from magmas to ore deposits
  12. A story of olivine from the McIvor Hill complex (Tasmania, Australia): Clues to the origin of the Avebury metasomatic Ni sulfide deposit
  13. Special collection: perspectives on origins and evolution of crustal magmas
  14. The origin of extensive Neoarchean high-silica batholiths and the nature of intrusive complements to silicic ignimbrites: Insights from the Wyoming batholith, U.S.A.
  15. Special collection: perspectives on origins and evolution of crustal magmas
  16. From the Hadean to the Himalaya: 4.4 Ga of felsic terrestrial magmatism
  17. Spinels renaissance: the past, present, and future of those ubiquitous minerals and materials
  18. Compositional effects on the solubility of minor and trace elements in oxide spinel minerals: insights from crystal-crystal partition coefficients in chromite exsolution
  19. Spinels renaissance: the past, present, and future of those ubiquitous minerals and materials
  20. An X-ray magnetic circular dichroism (XMCD) study of Fe ordering in a synthetic MgAl2O4-Fe3O4 (spinel-magnetite) solid-solution series: Implications for magnetic properties and cation site ordering
  21. Research Article
  22. High concentrations of manganese and sulfur in deposits on Murray Ridge, Endeavour Crater, Mars
  23. Research Article
  24. A Cr3+ luminescence study of spodumene at high pressures: effects of site geometry, a phase transition, and a level-crossing
  25. Research Article
  26. Phase transitions between high- and low-temperature orthopyroxene in the Mg2Si2O6-Fe2Si2O6 system
  27. Research Article
  28. High-temperature and high-pressure behavior of carbonates in the ternary diagram CaCO3-MgCO3-FeCO3
  29. Research Article
  30. Natural Mg-Fe clinochlores: enthalpies of formation and dehydroxylation derived from calorimetric study
  31. Research Article
  32. Trace element thermometry of garnet-clinopyroxene pairs
  33. Research Article
  34. Constraints on the solid solubility of Hg, Tl, and Cd in arsenian pyrite
  35. Research Article
  36. Ni-phyllosilicates (garnierites) from the Falcondo Ni-laterite deposit (Dominican Republic): mineralogy, nanotextures, and formation mechanisms by HRTEM and AEM
  37. Research Article
  38. Cu diffusion in a basaltic melt
  39. Research Article
  40. High-pressure behavior of the polymorphs of FeOOH
  41. New Mineral Names
  42. New Mineral Names
https://doi.org/10.2138/am-2016-5462
Schlagwörter für diesen Artikel
Zirconium diffusion; Zr diffusivity; zircon solubility; zircon growth; zircon geospeedometer; cooling rate; Bishop Tuff; Invited Centennial article

Artikel in diesem Heft

  1. Invited Centennial Article
  2. On the nature and significance of rarity in mineralogy
  3. Special collection: mechanisms, rates, and timescales of geochemical transport processes in the crust and mantle
  4. Zircon saturation and Zr diffusion in rhyolitic melts, and zircon growth geospeedometer
  5. Review
  6. On silica-rich granitoids and their eruptive equivalents
  7. Special collection: advances in ultrahigh-pressure metamorphism
  8. Discovery of in situ super-reducing, ultrahigh-pressure phases in the Luobusa ophiolitic chromitites, Tibet: new insights into the deep upper mantle and mantle transition zone
  9. Special collection: from magmas to ore deposits
  10. Uraninite from the Olympic Dam IOCG-U-Ag deposit: linking textural and compositional variation to temporal evolution
  11. Special collection: from magmas to ore deposits
  12. A story of olivine from the McIvor Hill complex (Tasmania, Australia): Clues to the origin of the Avebury metasomatic Ni sulfide deposit
  13. Special collection: perspectives on origins and evolution of crustal magmas
  14. The origin of extensive Neoarchean high-silica batholiths and the nature of intrusive complements to silicic ignimbrites: Insights from the Wyoming batholith, U.S.A.
  15. Special collection: perspectives on origins and evolution of crustal magmas
  16. From the Hadean to the Himalaya: 4.4 Ga of felsic terrestrial magmatism
  17. Spinels renaissance: the past, present, and future of those ubiquitous minerals and materials
  18. Compositional effects on the solubility of minor and trace elements in oxide spinel minerals: insights from crystal-crystal partition coefficients in chromite exsolution
  19. Spinels renaissance: the past, present, and future of those ubiquitous minerals and materials
  20. An X-ray magnetic circular dichroism (XMCD) study of Fe ordering in a synthetic MgAl2O4-Fe3O4 (spinel-magnetite) solid-solution series: Implications for magnetic properties and cation site ordering
  21. Research Article
  22. High concentrations of manganese and sulfur in deposits on Murray Ridge, Endeavour Crater, Mars
  23. Research Article
  24. A Cr3+ luminescence study of spodumene at high pressures: effects of site geometry, a phase transition, and a level-crossing
  25. Research Article
  26. Phase transitions between high- and low-temperature orthopyroxene in the Mg2Si2O6-Fe2Si2O6 system
  27. Research Article
  28. High-temperature and high-pressure behavior of carbonates in the ternary diagram CaCO3-MgCO3-FeCO3
  29. Research Article
  30. Natural Mg-Fe clinochlores: enthalpies of formation and dehydroxylation derived from calorimetric study
  31. Research Article
  32. Trace element thermometry of garnet-clinopyroxene pairs
  33. Research Article
  34. Constraints on the solid solubility of Hg, Tl, and Cd in arsenian pyrite
  35. Research Article
  36. Ni-phyllosilicates (garnierites) from the Falcondo Ni-laterite deposit (Dominican Republic): mineralogy, nanotextures, and formation mechanisms by HRTEM and AEM
  37. Research Article
  38. Cu diffusion in a basaltic melt
  39. Research Article
  40. High-pressure behavior of the polymorphs of FeOOH
  41. New Mineral Names
  42. New Mineral Names
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