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Continuation of the Laurentian Grenville Province across the Ross Sea Margin of East Antarctica

Goodge, John W; Fanning, Christopher; Brecke, D.M.; Licht, Kathy J.; Palmer, Emerson F.

Description

Zircon U-Pb ages from glacial clasts in Quaternary tills of the central Transantarctic Mountains indicate the presence of Grenville-age crust along the Ross Sea margin of East Antarctica. The polymict tills contain a variety of igneous, metaigneous, and metasedimentary clasts with Proterozoic ages not known from basement exposure. Four orthogneiss clasts have igneous ages of ∼1065-1100 Ma and Ross Orogen metamorphic overgrowths of ∼500-550 Ma. The latter ages indicate that these clasts are not...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
URI: http://hdl.handle.net/1885/50609
Source: Journal of Geology
DOI: 10.1086/656385

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