Differentiated impact melt sheets may be a potential source of Hadean detrital zircon: COMMENT
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چکیده
منابع مشابه
Metamorphic replacement of mineral inclusions in detrital zircon from Jack Hills , Australia : Implications for the Hadean Earth
We appreciate that Rasmussen et al. (2011) have characterized a large number of inclusions in Jack Hills (Australia) detrital zircons, but we fi nd two signifi cant fl aws in their paper: one of scholarship and one of omission. With regard to the fi rst, their paper implies discovery of reset isotopic systems in phosphate inclusions in Jack Hills zircons. This was previously discussed by Caro e...
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19 Detrital-zircon analysis of sandstones interbedded with ca 464 Ma ignimbrites in 20 the lower Mweelrea Formation of the South Mayo Trough, western Ireland, 21 suggests Ordovician source-rock provenance that corresponds to two distinct 22 volcanic-arc phases on the Laurentian margin. East-derived sandstones contain a 23 suite of zircons with a mean age of ca 487 Ma that suggests derivation fr...
متن کاملDetermination of zircon/melt trace element partition coefficients from SIMS analysis of melt inclusions in zircon
Partition coefficients (DM) for rare earth elements (REE) (La, Ce, Nd, Sm, Dy, Er and Yb) and other trace elements (Ba, Rb, B, Sr, Ti, Y and Nb) between zircon and melt have been calculated from secondary ion mass spectrometric (SIMS) analyses of zircon/melt inclusion pairs. The melt inclusion-mineral (MIM) technique shows that DREE increase in compatibility with increasing atomic number, simil...
متن کاملConstraints on Hadean zircon protoliths from oxygen isotopes, Ti-thermometry, and rare earth elements
[1] 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 se...
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Detrital zircon studies are providing new insights on the evolution of sedimentary basins but the role of sedimentary recycling remains largely undefined. In a broad region of northwestern North America, this contribution traces the pathway of detrital zircon sand grains from Proterozoic sandstones through Phanerozoic strata and argues for multi-stage sedimentary recycling over more than a bill...
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ژورنال
عنوان ژورنال: Geology
سال: 2016
ISSN: 0091-7613,1943-2682
DOI: 10.1130/g38135c.1