An Early Miocene granite clast in a tuffisite dike at Miners Head, Great Barrier Island

An Early Miocene granite clast in a tuffisite dike at Miners Head, Great Barrier Island

A c. 30 cm thick hydrothermal dike (tuffisite) cuts Early Cretaceous Waipapa Composite Terrane basement on Great Barrier Island. The dike was previously, and erroneously, described as a conglomerate band in the Waipapa Composite Terrane. Zircon from a granite clast in the dike gives a U-Pb age of 17...

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Veröffentlicht in:New Zealand journal of geology and geophysics 2017-07, Vol.60 (3), p.314-318
Hauptverfasser: Adams, C. J., Mortimer, N.
Format: Artikel
Sprache:eng
Schlagworte:
Barrier islands
Conglomerates
Coromandel
Cretaceous
Geochronology
Geochronometry
Granite
Great Barrier Island
Miners
Mining
Miocene
Radiometric dating
tuffisite
U-Pb zircon dating
Zircon
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Beschreibung
Zusammenfassung:A c. 30 cm thick hydrothermal dike (tuffisite) cuts Early Cretaceous Waipapa Composite Terrane basement on Great Barrier Island. The dike was previously, and erroneously, described as a conglomerate band in the Waipapa Composite Terrane. Zircon from a granite clast in the dike gives a U-Pb age of 17.1 ± 0.6 Ma. The age contributes to a growing dataset of geochronological information from the Miocene Northland Arc.
ISSN:0028-8306
1175-8791
DOI:10.1080/00288306.2017.1316293