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Primitive oxygen-isotope ratio recorded in magmatic zircon from the Mid-Atlantic Ridge

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Published/Copyright: April 1, 2015
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American Mineralogist
From the journal American Mineralogist Volume 94 Issue 7

Abstract

The oxygen-isotope composition of the Earth’s upper mantle is an important reference for understanding mantle and crust geochemical cycles. Olivine is the most commonly used mineral for determining the influence of crustal processes on the oxygen-isotope ratio (δ18O) of primitive rocks, however it is an uncommon mineral in continental crust and readily alters at or near Earth’s surface. Here we report the first measurements of oxygen-isotope ratios in zircon from oceanic crust exposed at a mid-ocean ridge. Measurements of δ18O and trace elements were made by ion microprobe on zircon in polished rock chips of gabbro and veins in serpentinized peridotite drilled from the Mid-Atlantic Ridge. The zircon grains contain both oscillatory and sector growth zoning, features characteristic of magmatic zircon. Values of δ18O (zircon) = 5.3 ± 0.8‰ (2 st. dev., n = 68) for the population are consistent with the interpretation that these grains are igneous in origin and formed in high-temperature isotopic equilibrium with mantle oxygen. The δ18O values demonstrate that zircon in oceanic crust preserves primitive δ18O in spite of sub-solidus alteration of the whole rock. The fact that the primitive δ18O (zircon) values fall in a narrow range (5.3 ± 0.8‰) strengthens the use of oxygen isotopes in zircon as a tracer to identify processes of exchange in a wide range of modern and ancient crustal environments, including subducted oceanic crust (eclogite), and also in the oldest known pieces of Earth, >3900 million-year-old detrital zircon grains from Western Australia.

Keywords : Zircon; ODP; MARK; oxygen isotope; oceanic crust; ion microprobe
Received: 2008-3-21
Accepted: 2009-3-12
Published Online: 2015-4-1
Published in Print: 2009-7-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. 27Al NMR spectroscopy at multiple magnetic fields and ab initio quantum modeling for kaolinite
  2. The effect of oxygen fugacity on the olivine to wadsleyite transformation: Implications for remote sensing of mantle redox state at the 410 km seismic discontinuity
  3. Spectroscopic characteristics of synthetic olivine: An integrated multi-wavelength and multi-technique approach
  4. Effects of hydration on thermal expansion of forsterite, wadsleyite, and ringwoodite at ambient pressure
  5. Forsterite, hydrous and anhydrous wadsleyite and ringwoodite (Mg2SiO4): 29Si NMR results for chemical shift anisotropy, spin-lattice relaxation, and mechanism of hydration
  6. Structural transitions and electron transfer in coffinite, USiO4, at high pressure
  7. Fe-Mg partitioning between perovskite and ferropericlase in the lower mantle
  8. Primitive oxygen-isotope ratio recorded in magmatic zircon from the Mid-Atlantic Ridge
  9. Determination of the potential for extrinsic color development in natural colorless quartz
  10. X-ray diffraction and Raman spectroscopic study of clinopyroxenes with six-coordinated Si in the Na(Mg0.5Si0.5)Si2O6-NaAlSi2O6 system
  11. Phase behavior of protoenstatite at high pressure studied by atomistic simulations
  12. Metasomatic replacement of inherited metamorphic monazite in a biotite-garnet granite from the Nízke Tatry Mountains, Western Carpathians, Slovakia: Chemical dating and evidence for disequilibrium melting
  13. Shear viscosity and diffusion in liquid MgSiO3: Transport properties and implications for terrestrial planet magma oceans
  14. Polarized infrared spectroscopic study of diffusion of water molecules along structure channels in beryl
  15. The vibrational spectrum of lizardite-1T [Mg3Si2O5(OH)4] at the Γ point: A contribution from an ab initio periodic B3LYP calculation
  16. Origins of Mount St. Helens cataclasites: Experimental insights
  17. The crystal structure and hydrogen bonding of synthetic konyaite, Na2Mg(SO4)2·5H2O
  18. Joëlbruggerite, Pb3Zn3(Sb5+,Te6+)As2O13(OH,O), the Sb5+ analog of dugganite, from the Black Pine mine, Montana
  19. Cathodoluminescence characterization of tridymite and cristobalite: Effects of electron irradiation and sample temperature
  20. Sequential extraction and DXRD applicability to poorly crystalline Fe- and Al-phase characterization from an acid mine water passive remediation system
  21. Thermoelasticity of ε-FeSi to 8 GPa and 1273 K
  22. Demicheleite-(Cl), BiSCl, a new mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy
  23. Biomineralization associated with microbial reduction of Fe3+ and oxidation of Fe2+ in solid minerals
  24. Evidence for residual elastic strain in deformed natural quartz
  25. Mineralogy of mine waste at the Vermont Asbestos Group mine, Belvidere Mountain, Vermont
  26. Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source
  27. Structure determination of the 2.5 hydrate MgSO4 phase by simulated annealing
https://doi.org/10.2138/am.2009.2982
Keywords for this article
Zircon; ODP; MARK; oxygen isotope; oceanic crust; ion microprobe

Articles in the same Issue

  1. 27Al NMR spectroscopy at multiple magnetic fields and ab initio quantum modeling for kaolinite
  2. The effect of oxygen fugacity on the olivine to wadsleyite transformation: Implications for remote sensing of mantle redox state at the 410 km seismic discontinuity
  3. Spectroscopic characteristics of synthetic olivine: An integrated multi-wavelength and multi-technique approach
  4. Effects of hydration on thermal expansion of forsterite, wadsleyite, and ringwoodite at ambient pressure
  5. Forsterite, hydrous and anhydrous wadsleyite and ringwoodite (Mg2SiO4): 29Si NMR results for chemical shift anisotropy, spin-lattice relaxation, and mechanism of hydration
  6. Structural transitions and electron transfer in coffinite, USiO4, at high pressure
  7. Fe-Mg partitioning between perovskite and ferropericlase in the lower mantle
  8. Primitive oxygen-isotope ratio recorded in magmatic zircon from the Mid-Atlantic Ridge
  9. Determination of the potential for extrinsic color development in natural colorless quartz
  10. X-ray diffraction and Raman spectroscopic study of clinopyroxenes with six-coordinated Si in the Na(Mg0.5Si0.5)Si2O6-NaAlSi2O6 system
  11. Phase behavior of protoenstatite at high pressure studied by atomistic simulations
  12. Metasomatic replacement of inherited metamorphic monazite in a biotite-garnet granite from the Nízke Tatry Mountains, Western Carpathians, Slovakia: Chemical dating and evidence for disequilibrium melting
  13. Shear viscosity and diffusion in liquid MgSiO3: Transport properties and implications for terrestrial planet magma oceans
  14. Polarized infrared spectroscopic study of diffusion of water molecules along structure channels in beryl
  15. The vibrational spectrum of lizardite-1T [Mg3Si2O5(OH)4] at the Γ point: A contribution from an ab initio periodic B3LYP calculation
  16. Origins of Mount St. Helens cataclasites: Experimental insights
  17. The crystal structure and hydrogen bonding of synthetic konyaite, Na2Mg(SO4)2·5H2O
  18. Joëlbruggerite, Pb3Zn3(Sb5+,Te6+)As2O13(OH,O), the Sb5+ analog of dugganite, from the Black Pine mine, Montana
  19. Cathodoluminescence characterization of tridymite and cristobalite: Effects of electron irradiation and sample temperature
  20. Sequential extraction and DXRD applicability to poorly crystalline Fe- and Al-phase characterization from an acid mine water passive remediation system
  21. Thermoelasticity of ε-FeSi to 8 GPa and 1273 K
  22. Demicheleite-(Cl), BiSCl, a new mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy
  23. Biomineralization associated with microbial reduction of Fe3+ and oxidation of Fe2+ in solid minerals
  24. Evidence for residual elastic strain in deformed natural quartz
  25. Mineralogy of mine waste at the Vermont Asbestos Group mine, Belvidere Mountain, Vermont
  26. Structural parameters of chromite included in diamond and kimberlites from Siberia: A new tool for discriminating ultramafic source
  27. Structure determination of the 2.5 hydrate MgSO4 phase by simulated annealing
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