Journal
TERRA NOVA
Volume 22, Issue 2, Pages 116-124Publisher
WILEY
DOI: 10.1111/j.1365-3121.2010.00924.x
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P>A unique set of mafic intrusives collected during a 1921 expedition to Novaya Zemlya and reported to cut Devonian sedimentary rocks, are shown instead to represent a Cryogenian magmatic arc. Zircon and titanite in four samples from Mashigin Fjord and Matochkin Strait yield U-Pb ages of 716-704 Ma and the dyke geochemistry shows typical subduction-zone features. These rocks have the characteristics of a peri-Gondwanan subduction-related complex, and originally could have been affiliated to the Avalonian systems before accreting to Baltica during the Timanian orogeny.
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