Oxygen Isotopes in Zircon

Valley, John W.

doi:10.2113/0530343

Cited by 643 publications

(382 citation statements)

References 117 publications

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“…The low zircon oxygen isotopic value (4.0‰) (Fig. 7a), confirmed by duplicate analyses, is obviously lower than mantle zircon O values (5.3 ± 0.6‰) (Valley, 2003). Thus, one or more components that have undergone high-temperate water-rock interaction were added to the source of the monzogranites or contaminated their magmas.…”

Section: Zircon Hf-o Isotopic Compositionsmentioning

confidence: 75%

An Early Permian (ca. 280Ma) silicic igneous province in the Alxa Block, NW China: A magmatic flare-up triggered by a mantle-plume?

Wei

Wang

et al. 2014

Lithos

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Section: Zircon Hf-o Isotopic Compositionsmentioning

confidence: 75%

An Early Permian (ca. 280Ma) silicic igneous province in the Alxa Block, NW China: A magmatic flare-up triggered by a mantle-plume?

Wei

Wang

et al. 2014

Lithos

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“…6b). Given the slow diffusion of O in zircon, O-isotope exchange might only be anticipated to any significant degree in dissolution-reprecipitation processes, while solid-state recrystallisation processes might be less affected, if at all (Valley, 2003). Peck et al, (2004) analysed some of the heaviest δ 18 O magmatic zircon worldwide in the Grenvillian Frontenac terrane and proposed hydrothermally altered basalts and sediments as a source for the heavy oxygen.…”

Section: O-isotope Constrains On Subsurface Evolution Of Ohiomentioning

confidence: 99%

Zircon U-Pb, Hf and O isotope constraints on growth versus reworking of continental crust in the subsurface Grenville orogen, Ohio, USA

Petersson

Scherstén

Andersson

et al. 2015

Precambrian Research

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“…Zircons in equilibrium with pristine mantle-derived melts theoretically have δ 18 O values of 5.3 ± 0.3‰. However, zircons crystallized from a mixed source magma which involves a sedimentary cycle or hydrothermal alteration have elevated δ 18 O values [60,61]. Thus, combination of Hf and O isotopes can be used to distinguish zircons derived from a mantle sources or a crustal source region with a high sedimentary component [4,62].…”

Section: Implications For Early Precambrian Crustal Evolution In the Nccmentioning

confidence: 99%

Early Precambrian tectonothermal events of the North China Craton: Constraints from in situ detrital zircon U-Pb, Hf and O isotopic compositions in Tietonggou Formation

et al. 2013

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Clastic sediments and sedimentary rocks are widely used for understanding the formation and evolution of the continental crust. The Tietonggou Formation outcrops in the Xiaoqinling region at the southern margin of the North China Craton (NCC) and has unconformable contacts with the underlying Taihua Complex and overlying Paleoproterozoic Xiong'er Group. It mainly consists of quartzite and its protoliths are mature terrigenous clastic rocks. On the basis of the ages of the youngest detrital zircons from the quartzites and the ages of the Xiong'er Group, the depositional ages of the protoliths of the Tietonggou Formation were well constrained to 1.91-1.80 Ga. The U-Pb isotopic data of detrital zircons from the Formation show a major age peak at ~2.1 Ga, which is consistent with 2.2-2.0 Ga magmatism in the Trans-North China Orogen of the NCC. Taking into account the texctural and compositional maturity of the Tietonggou Formation quartzite, the ~2.1 Ga lithologic units in the Trans-North China Orogen are interpreted as the major source of the Tietonggou Formation. The majority of these ~2.1 Ga detrital zircons mostly have high δ 18 O values (>6.5‰) and negative ε Hf (t) values (-7.8-0.0), with corresponding Hf model ages significantly older than their crystallization ages, indicating that these zircons formed from the partial melting of ancient continental crust. The majority of the 2.8-2.7 Ga and ~2.5 Ga detrital zircons from the Tietonggou Formation had positive ε Hf (t) values, and mantle-like δ 18 O values, suggesting that the NCC has experienced two stages of significant crustal growth in the Neoarchaean at 2.7 and 2.5 Ga, respectively. The Hf isotopic data of detrital zircons from Paleoproterozoic metasedimentary rocks in the Trans-North China Orogen varied mainly toward the reduction of the radiogenic Hf isotope and gradually show a similar trend of the isotope trajectories of crustal evolution. This reveals that the NCC probably has not developed a long-lived subduction to complete the final assembly of the NCC. Alternatively, these maybe imply that the tectonic setting of the NCC substantially changed at ~2.1 Ga, the reduction of the radiogenic Hf isotope could be attributed to the rollback of the subducting slab. North China Craton, Tietonggou Formation, detrital zircon, Hf isotope, O isotope Citation:Diwu C R, Sun Y, Gao J F, et al. Early Precambrian tectonothermal events of the North China Craton: Constraints from in situ detrital zircon

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Oxygen Isotopes in Zircon

Cited by 643 publications

References 117 publications

An Early Permian (ca. 280Ma) silicic igneous province in the Alxa Block, NW China: A magmatic flare-up triggered by a mantle-plume?

An Early Permian (ca. 280Ma) silicic igneous province in the Alxa Block, NW China: A magmatic flare-up triggered by a mantle-plume?

Zircon U-Pb, Hf and O isotope constraints on growth versus reworking of continental crust in the subsurface Grenville orogen, Ohio, USA

Early Precambrian tectonothermal events of the North China Craton: Constraints from in situ detrital zircon U-Pb, Hf and O isotopic compositions in Tietonggou Formation

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