Oxygen isotope ratios of Archean plutonic zircons from granite–greenstone belts of the Superior Province: indicator of magmatic source

King, Elizabeth M.; Valley, John W.; Davis, Don W.; Edwards, G. R.

doi:10.1016/s0301-9268(98)00082-5

Cited by 143 publications

(67 citation statements)

References 57 publications

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“…18 O measurements of Archaean materials including 2.7 Ga zircon from Superior Province TTG magmas (King et al, 1998), 3.2 Ga olivine inclusions contained within syngenetic diamonds (Mattey et al, 1994) and $3.8 Ga olivine from an unlayered dunite (Lowery et al, 2003) all pointing to the consistency of mantle compositions over time.…”

Section: The Oxygen Isotopic Composition Of Eoarchaean Mantle Sedimementioning

confidence: 99%

“…This evidence for a chondritic Lu/Hf isotopic composition in the source of Archaean continents is in contrast to previous interpretation from Hf isotopic studies of the IGC Vervoort and Blichert-Toft, 1999;Amelin et al, 2000), which suggested that these rocks were Valley et al (1998) and Archaean-Hadean ''supracrustal zircon" from Cavosie et al (2005a). Data sourced from: (1) Amelin et al (1999), (2) Harrison et al (2005), (3) Harrison et al (2008), (4) Blichert-Toft and Albarède (2008), (5) Choi et al (2006), (6) Amelin et al (2000), (7) Peck et al (2001), (8) Cavosie et al (2005), (9) Trail et al (2007), (10) Valley et al (2005), (11) King (2001), (12) King et al (1998), and (13) King et al (2000). derived from melting of a depleted upper mantle reservoir that had a long-term, high 176 Lu/ 177 Hf ratio.…”

Section: Fig 6 (Continued )mentioning

confidence: 99%

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In situ U–Pb, O and Hf isotopic compositions of zircon and olivine from Eoarchaean rocks, West Greenland: New insights to making old crust

Hiess

Bennett

Nutman

et al. 2009

Geochimica et Cosmochimica Acta

170

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In situ U-Pb, O and Hf isotopic compositions of zircon and olivine from Eoarchaean rocks, West Greenland: new insights to making old crust AbstractThe sources and petrogenetic processes that generated some of the Earth's oldest continental crust have been more tightly constrained via an integrated, in situ (U-Pb, O and Hf) isotopic approach. The minerals analysed were representative zircon from four Eoarchaean TTG tonalites and two felsic volcanic rocks, and olivine from one harzburgite/dunite of the Itsaq Gneiss Complex (IGC), southern West Greenland. The samples were carefully chosen from localities with least migmatisation, metasomatism and strain. Zircon was thoroughly characterized prior to analysis using cathodoluminescence, scanning electron, reflected and transmitted light imaging. The zircon from all but one sample showed only minor post-magmatic recrystallisation. (207)Pb/(106)Pb dating of oscillatory-zoned zircon using SHRIMP RG (n = 142) indicates derivation of the felsic igneous rocks from different batches of magma at 3. 88, 3.85, 3.81, 3.80 and 3.69 Ga. Analyses of (18)O/(16)O compositions of olivine from a harzburgite/dunite (n = 8) using SHRIMP II in multi-collector mode, indicate that the oxygen isotopic composition of this sample of Eoarchaean mantle (delta(18)O(OI) = 6.0 +/-0.4 parts per thousand) was slightly enriched in (18)O, but not significantly different from that of the modern mantle. Zircon delta(18)O measurements from the six felsic rocks (n = 93) record mean or weighted mean compositions ranging from 4.9 +/-0.7 parts per thousand to 5.1 +/-0.4 parts per thousand, with recrystallised domains showing no indication of oxygen isotopic exchange during younger tectonothermal events. delta(18)O(Zr) compositions indicate that the primary magmas were largely in equilibrium with the mantle or mantle-derived melts generated at similar high temperatures, while calculated tonalite delta(18)O(WR) compositions (6.7-6.9 parts per thousand) resemble those of modern adakites. LA-MC-ICPMS zircon (176)Hf/(177)Hf analyses were obtained from six samples (n = 122), Five samples record weighted mean initial epsilon(Hf) compositions ranging from to 0.5 +/-0.6 to -0.1 +/-0.7 (calculated using lambda(176)Lu = 1.867 x 10(-11) yr(-1)), while one sample records a composition of 1.3 +/-0.7, indicating the magmas were generated from a reservoir with a time averaged, near chondritic Lu/Hf. The derivation of TTG magmas from a chondritic Lu/Hf source implies either that there was not voluminous continental crustal growth nor major mantle differentiation leading to Lu/Hf fractionation during the Hadean or Eoarchaean, or alternatively that rapid recycling of an early formed crust allowed the early mantle to maintain a chondritic Lu/Hf. Previous studies have demonstrated that ancient TTG rocks were mostly produced by dehydration melting of mafic rocks within the stability field of garnet, probably in flatly-subducted or buried oceanic crust. The oxygen isotopic signatures measured here at high spatial resolution allow ...

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Section: The Oxygen Isotopic Composition Of Eoarchaean Mantle Sedimementioning

confidence: 99%

Section: Fig 6 (Continued )mentioning

confidence: 99%

In situ U–Pb, O and Hf isotopic compositions of zircon and olivine from Eoarchaean rocks, West Greenland: New insights to making old crust

Hiess

Bennett

Nutman

et al. 2009

Geochimica et Cosmochimica Acta

170

View full text Add to dashboard Cite

show abstract

“…18 O values of mantle-derived zircon 21 and zircon from juvenile, 3.0 to 2.7 Gyr tonalite-trondhjemite-granodiorite plutonic rocks of the Superior Province 22 . The second spot was located in the high LREE region of the grain, which is brighter in the CL image (Fig.…”

mentioning

confidence: 98%

“…18 O wallrock, is unlikely, as it would require either energetically unrealistic amounts of assimilation (.50%) or wallrocks with average d 18 O values above 12½ which are uncommon even in the late Archaean 22 . The correlation of high d…”

mentioning

confidence: 99%

Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago

Wilde

Valley

Peck

et al. 2001

Nature

1,511

597

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“…The oxygen isotope ratios of the studied zircons (δ 18 O =~5.8‰-6.9‰; Fig. 2; Appendix C) are commonly observed in the zircons from granitoids (e.g., King et al, 1998;Kemp et al, 2009), also indicating a continental crustal origin. Zircons derived from more evolved intermediate-felsic magmas would most likely have TE characteristics with crustal affinities, primarily owing to the FC of mafic minerals and the corresponding evolution of the geochemistry of the magmas; in other words, differentiation from mafic to intermediate or felsic compositions would control the TE budget for later crystallized PDL zircons.…”

Section: Tectonic Setting Of the Late Triassic Magmatism In Yidun Termentioning

confidence: 87%

Oxygen isotope and trace element geochemistry of zircons from porphyry copper system: Implications for Late Triassic metallogenesis within the Yidun Terrane, southeastern Tibetan Plateau

Kong

Chen

2016

Chemical Geology

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Oxygen isotope ratios of Archean plutonic zircons from granite–greenstone belts of the Superior Province: indicator of magmatic source

Cited by 143 publications

References 57 publications

In situ U–Pb, O and Hf isotopic compositions of zircon and olivine from Eoarchaean rocks, West Greenland: New insights to making old crust

In situ U–Pb, O and Hf isotopic compositions of zircon and olivine from Eoarchaean rocks, West Greenland: New insights to making old crust

Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago

Oxygen isotope and trace element geochemistry of zircons from porphyry copper system: Implications for Late Triassic metallogenesis within the Yidun Terrane, southeastern Tibetan Plateau

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