Whole-rock geochemistry and zircon O-Hf isotope compositions of ca. 2.35 Ga strongly peraluminous granites: Implications for increase in zircon δ18O values during the Paleoproterozoic

Xie, Shucheng; Wang, Fang; Bucholz, Claire E.; Liu, Fulai; Wang, Peizhi; Bao, Zemin; Liu, Dunyi

doi:10.1016/j.gca.2022.06.029

Cited by 7 publications

(2 citation statements)

References 78 publications

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“…2.3 Ga TTGs in this study, there are nearly coeval low-δ 18 O A-type granites and gabbro-diorites are also identified (e.g., Q. Y. Sun et al, 2023;Y. S. Wang et al, 2022;, which are inferred to be derived from recycling of high-T hydrothermally altered crustal rocks and a heterogeneous ancient subcontinental lithospheric mantle (SCLM) in an intraplate rift setting, respectively.…”

Section: Low δ 18 O and δ 30 Si Ca 23 Ga Ttg And Coeval Magmatism May...mentioning

confidence: 52%

“…In particular, in Earth's surface environments, the near-synchronous increase in the δ 18 O of sedimentary rocks and their recycling products of the ca. 2.4-2.2 Ga strongly peraluminous granites were reported (Liebmann et al, 2021(Liebmann et al, , 2022Xie et al, 2022). Given the near-synchronous changes of O isotopic compositions at both granitic end-members (A-and S-type), as well as the rapid increase in average detrital zircon δ 18 O values from <7.5‰ before GOE to 9-11‰ by ca.…”

Section: Ca 23 Ga Ttg and Coeval Magmatism Could Relate To The Onset ...mentioning

confidence: 99%

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Low δ¹⁸O and δ³⁰Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle

Zhou,

Zhai,

Mitchell

et al. 2024

JGR Solid Earth

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The start of the Paleoproterozoic supercontinent cycle is typically taken as the initiation of orogenesis at ca. 2.1 Ga leading to the assembly of Earth's first supercontinent, Columbia. However, the dearth of ca. 2.5–2.2 Ga geological records makes it difficult to deduce tectonic factors during the onset of the Paleoproterozoic supercontinent cycle. The petrogenesis of tonalite–trondhjemite–granodiorite (TTG) provides useful proxies for tracing prevailing geodynamic regimes of early continental evolution. However, marked decreases of TTG and other magmatism occurred across the Archean–Paleoproterozoic transition and have previously precluded forming testable hypotheses. Early Paleoproterozoic TTGs have been identified in the North China Craton (NCC) and other cratons, which may represent the last major pulse of TTGs globally. Here we present low δ18O and δ30Si ca. 2.3 Ga TTGs from the NCC, together with thermodynamic modeling and compilation of stable O and Si isotopes for TTGs globally through time. The ca. 2.3 Ga TTGs were derived from the partial melting of Archean basaltic crust and give lighter average zircon δ18O (3.15 ± 0.35‰) and whole‐rock δ30Si values (−0.17 ± 0.08‰) than most Archean TTGs. Considering coeval mafic‐felsic igneous rocks, and lithospheric thinning since ca. 2.5 Ga based on estimated crustal thickness through the Neoarchean–Paleoproterozoic, we posit the onset of an intraplate rifting consistent with the anomalous low‐δ18O magmatism. Continental rifting of Archean cratons/supercratons plausibly hints at the formation of rifts driving subduction initiation as the veritable onset of the Paleoproterozoic supercontinent cycle.

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Section: Low δ 18 O and δ 30 Si Ca 23 Ga Ttg And Coeval Magmatism May...mentioning

confidence: 52%

Section: Ca 23 Ga Ttg and Coeval Magmatism Could Relate To The Onset ...mentioning

confidence: 99%

Low δ¹⁸O and δ³⁰Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle

Zhou,

Zhai,

Mitchell

et al. 2024

JGR Solid Earth

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The diversity and origin of granites

Bucholz

2025

Treatise on Geochemistry

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Evolution of continental crust and sedimentary rock chemistry through time

Kamber,

Ossa Ossa

2023

Reference Module in Earth Systems and Environmental Sciences

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Whole-rock geochemistry and zircon O-Hf isotope compositions of ca. 2.35 Ga strongly peraluminous granites: Implications for increase in zircon δ18O values during the Paleoproterozoic

Cited by 7 publications

References 78 publications

Low δ¹⁸O and δ³⁰Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle

Low δ¹⁸O and δ³⁰Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle

The diversity and origin of granites

Evolution of continental crust and sedimentary rock chemistry through time

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Whole-rock geochemistry and zircon O-Hf isotope compositions of ca. 2.35 Ga strongly peraluminous granites: Implications for increase in zircon δ18O values during the Paleoproterozoic

Cited by 7 publications

References 78 publications

Low δ18O and δ30Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle

Low δ18O and δ30Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle

The diversity and origin of granites

Evolution of continental crust and sedimentary rock chemistry through time

Contact Info

Product

Resources

About

Low δ¹⁸O and δ³⁰Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle

Low δ¹⁸O and δ³⁰Si TTG at ca. 2.3 Ga Hints at an Intraplate Rifting Onset of the Paleoproterozoic Supercontinent Cycle