Filling in the juvenile magmatic gap: Evidence for uninterrupted Paleoproterozoic plate tectonics

C A Partin, A Bekker, Paul Sylvester, N Wodicka, R A Stern, T Chacko, L M Heaman

Research output: Contribution to journalArticlepeer-review

Abstract

Despite several decades of research on growth of the continental crust, it remains unclear whether the production of juvenile continental crust has been continuous or episodic throughout the Precambrian. Models for episodic crustal growth have gained traction recently through compilations of global U–Pb zircon age frequency distributions interpreted to delineate peaks and lulls in crustal growth through geologic time. One such apparent trough in zircon age frequency distributions between ∼2.45 and 2.22 Ga is thought to represent a pause in crustal addition, resulting from a global shutdown of magmatic and tectonic processes. The ∼2.45–2.22 Ga magmatic shutdown model envisions a causal relationship between the cessation of plate tectonics and accumulation of atmospheric oxygen over the same period. Here, we present new coupled U–Pb, Hf, and O isotope data for detrital and magmatic zircon from the western Churchill Province and Trans-Hudson orogen of Canada, covering an area of approxim
Original languageEnglish
Pages (from-to)123-133
JournalEarth and Planetary Science Letters
StatePublished - Feb 15 2014

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