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Recognition of mid-Paleozoic volcanism in New Zealand
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2018 (English)In: New Zealand Journal of Geology and Geophysics, Vol. 61, no 4, p. 413-427Article in journal (Refereed) Published
Abstract [en]

Two felsic volcanic clasts from conglomerates in Fiordland and northwest Nelson provide U–Pb zircon ages of 359 and c. 362 Ma respectively; ages that occur within the interval between voluminous Western Province plutonic S-type magmatism of the Karamea and Ridge suites. Both volcanic clasts have inherited zircon populations, and trace element signatures suggesting derivation from crustal melts. The dacitic clast from the mid-Cretaceous Seek Cove Formation in southwest Fiordland has whole-rock chemistry and an O–Hf–zircon isotopic signature consistent with derivation from the Takaka Terrane. A rhyolite clast from the Pupu Conglomerate in northwest Nelson also has chemistry consistent with derivation from a Takaka Terrane source. We therefore correlate both volcanic clasts to the S-type Ridge Suite. No comparable S-type plutonic source of the same age has been recognised in the northwest Nelson section of the Takaka Terrane. These volcanic clasts represent the oldest recognised episode of S-type Ridge Suite magmatism in the Takaka Terrane.

Place, publisher, year, edition, pages
Taylor & Francis , 2018. Vol. 61, no 4, p. 413-427
National Category
Earth and Related Environmental Sciences
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-3188DOI: 10.1080/00288306.2018.1469513OAI: oai:DiVA.org:nrm-3188DiVA, id: diva2:1273383
Available from: 2018-12-20 Created: 2018-12-20 Last updated: 2018-12-21Bibliographically approved

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Publisher's full texthttps://doi.org/10.1080/00288306.2018.1469513

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Whitehouse, Martin J.
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