Constraints on Hadean zircon protoliths from oxygen isotopes, Ti-thermometry, and rare earth elements

Dustin Trail, S. Mojzsis, T. Mark Harrison, Axel K. Schmitt, E. Bruce Watson, Edward D. Young

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

We report zircon oxygen isotope ratios and reconnaissance Ti-in-zircon concentrations, guided by cathodoluminescence image studies, for detrital zircons up to 4.34 Ga from the Narryer Gneiss Complex of Western Australia. Zircon oxygen isotope results bolster the view that some Hadean (>3.85 Ga) zircon source melts were enriched in heavy oxygen, a sensitive proxy for melt contamination by sediments altered in liquid water. Zircon crystallization temperatures calculated from Ti concentration in pre-3.8 Ga zircons yield values around 680°C in all cases except for one lower value in a 4.0 Ga grain. Elevated zircon δ18O values reported here and elsewhere, combined with low minimum-melt crystallization temperatures, and analysis of zircon/melt partitioning of rare earth elements (REEs) provide mutually consistent lines of evidence that the Hadean Earth supported an evolved rock cycle which included formation of granitic water-saturated melts, extensive continental crust, hydrosphere-lithosphere interactions, and sediment recycling within the first 150 million years of planet formation.

Original languageEnglish
Article numberQ06014
JournalGeochemistry, Geophysics, Geosystems
Volume8
Issue number6
DOIs
Publication statusPublished - Jun 2007

Fingerprint

Oxygen Isotopes
Hadean
oxygen isotopes
Rare earth elements
protolith
oxygen isotope
temperature measurement
zircon
rare earth element
rare earth elements
sediments
melt
Earth hydrosphere
crystallization
gneiss
reconnaissance
isotope ratios
recycling
cathodoluminescence
lithosphere

Keywords

  • Crust
  • Hadean
  • Ion microprobe
  • Oxygen
  • Rare earth elements
  • Zircon thermometry

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Constraints on Hadean zircon protoliths from oxygen isotopes, Ti-thermometry, and rare earth elements. / Trail, Dustin; Mojzsis, S.; Harrison, T. Mark; Schmitt, Axel K.; Watson, E. Bruce; Young, Edward D.

In: Geochemistry, Geophysics, Geosystems, Vol. 8, No. 6, Q06014, 06.2007.

Research output: Contribution to journalArticle

Trail, Dustin ; Mojzsis, S. ; Harrison, T. Mark ; Schmitt, Axel K. ; Watson, E. Bruce ; Young, Edward D. / Constraints on Hadean zircon protoliths from oxygen isotopes, Ti-thermometry, and rare earth elements. In: Geochemistry, Geophysics, Geosystems. 2007 ; Vol. 8, No. 6.
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