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Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago
No crustal rocks are known to have survived since the time of the intense meteor bombardment that affected Earth between its formation about 4,550 Myr ago and 4,030 Myr, the age of the oldest knownExpand
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4.4 billion years of crustal maturation: oxygen isotope ratios of magmatic zircon
Analysis of δ18O in igneous zircons of known age traces the evolution of intracrustal recycling and crust-mantle interaction through time. This record is especially sensitive because oxygen isotopeExpand
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Further characterisation of the 91500 zircon crystal
This paper reports the results from a second characterisation of the 91500 zircon, including data from electron probe microanalysis, laser ablation inductively coupled plasma-mass spectrometryExpand
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Oxygen isotope ratios and rare earth elements in 3.3 to 4.4 Ga zircons: Ion microprobe evidence for high δ 18 O continental crust and oceans in the Early Archean
Ion microprobe analyses of oxygen isotope ratios in Early Archean (Hadean) zircons (4.0- to 4.4-Ga) reveal variable magmatic δ18O values, including some that are high relative to the mantle,Expand
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A cool early Earth
No known rocks have survived from the first 500 m.y. of Earth history, but studies of single zircons suggest that some continental crust formed as early as 4.4 Ga, 160 m.y. after accretion of theExpand
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Empirical calibration of oxygen isotope fractionation in zircon
New empirical calibrations for the fractionation of oxygen isotopes among zircon, almandine-rich garnet, titanite, and quartz are combined with experimental values for quartz-grossular. The resultingExpand
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Comment on "Heterogeneous Hadean Hafnium: Evidence of Continental Crust at 4.4 to 4.5 Ga"
Harrison et al. (Reports, 23 December 2005, p. 1947) proposed that plate tectonics and granites existed 4.5 billion years ago (Ga), within 70 million years of Earth's formation, based on geochemistryExpand
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Calcite‐Graphite Thermometry of the Franklin Marble, New Jersey Highlands
We present new stable‐isotope data for the Mesoproterozoic Franklin Marble from outcrops along an 80‐km traverse parallel to and across strike of the structural grain of the western New JerseyExpand
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Oxygen isotope perspective on Precambrian crustal growth and maturation
In this study the authors contrast insights on Precambrian crustal growth and maturation from radiogenic and oxygen isotope systematics in the Superior (3.0--2.7 Ga) and Grenville (1.3--1.0 Ga)Expand
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Slow oxygen diffusion rates in igneous zircons from metamorphic rocks
Abstract Empirical tests of oxygen exchange rate in zircon crystals from amphibolite- and granulite-facies metamorphic rocks of the Grenville Province demonstrate preservation of igneous δ18O throughExpand
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