Terminal tectono-magmatic phase of the New England Orogen driven by lithospheric delamination

Hugo K.H. Olierook, Jasmine Gale,Franco Pirajno,Fred Jourdan,Christopher L. Kirkland,Noreen J. Evans,Bradley J. McDonald, Mark Krejci,Qiang Jiang,Anusha Shantha Kumara,Celia Mayers,R. Adam Frew,Hugo Kaag,Brent I.A. McInnes

Gondwana Research（2022）

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摘要

•A series of tholeiitic and alkaline basaltic sills are encountered in the Sydney Basin.•These intrusions—the Avon Sills—yield ages of 202.77 ± 0.68 Ma and 202 ± 7 Ma.•Avon Sills were derived from a deep, garnet-bearing source.•Late Triassic magmatism is best explained by lithospheric delamination.

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关键词

40Ar/39Ar,U-Pb,Sydney Basin,Bowen basin,Slab roll-back

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