Linked evolution and in situ growth of the Wabigoon superterrane, Superior Craton: evidence from zircon U-Pb isotopes and whole-rock geochemistry

Bjorkman, Katarina E.; Lu, Yongjun; Campbell McCuaig, T.; Kemp, Anthony I.S.; Hollings, Pete

doi:10.1016/j.precamres.2024.107341

Precambrian Research

2024

DOI: 10.1016/j.precamres.2024.107341

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Linked evolution and in situ growth of the Wabigoon superterrane, Superior Craton: evidence from zircon U-Pb isotopes and whole-rock geochemistry

Katarina E. Bjorkman,

Yongjun Lu,

T. Campbell McCuaig

et al.

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2024

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Cited by 2 publications

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The metamorphosed Neoarchean epithermal Vent prospect, Ontario, Canada

Strongman,

Gibson,

Lafrance

et al. 2024

Miner Deposita

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The metamorphosed Neoarchean epithermal Vent prospect, Ontario, Canada

Strongman,

Gibson,

Lafrance

et al. 2024

Miner Deposita

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Is plate tectonics a post-Archean phenomenon? A petrological perspective

Brown,

Pearce,

Johnson

2024

JGS

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The petrogenesis of contemporary igneous and metamorphic rocks is commonly explained by plate tectonics, but how far back in time does this relationship hold? Here we investigate whether the distinctive petrological features of recent ocean crust, subduction-related magmatism and regional metamorphism can be unambiguously identified in the Archean geological record. From an igneous perspective based on geological relationships and Th – Nb systematics, it is difficult to claim that any Archean ‘ophiolite’ was part of a global plate system rather than deriving from a plume ascending through attenuating lithosphere. Furthermore, the rarity of subduction-related rocks, particularly their plutonic equivalents which have good preservation potential, is consistent with the concept of local convergence and short-lived subduction. From a metamorphic perspective, the appearance of orogenic eclogites in the Paleoproterozoic, the widespread occurrence of blueschists and ultrahigh pressure metamorphic rocks since the late Neoproterozoic, and a change from a unimodal to a bimodal distribution of metamorphic T/P during the Proterozoic, are responses to secular cooling and the evolution of tectonics since the Archean. Our petrological perspective is that plate tectonics analogous to that on Earth today is probably a post Archean phenomenon.

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Linked evolution and in situ growth of the Wabigoon superterrane, Superior Craton: evidence from zircon U-Pb isotopes and whole-rock geochemistry

Cited by 2 publications

References 117 publications

The metamorphosed Neoarchean epithermal Vent prospect, Ontario, Canada

The metamorphosed Neoarchean epithermal Vent prospect, Ontario, Canada

Is plate tectonics a post-Archean phenomenon? A petrological perspective

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