Ar-Ar age constraints on the timing of Havre Trough opening and magmatism
Wysoczanski, Richard J.; Leonard, Graham; Gill, James; Wright, Ian; Calvert, Andrew T.; McIntosh, William; Jicha, Brian; Gamble, John A.; Timm, Christian; Handler, Monica; Drewes, Elizabeth; Zohrab, Alex
Date:
2019
Copyright:
© 2019, Informa UK Limited, trading as Taylor & Francis Group. All rights reserved.
Full text restriction information:
Access to this article is restricted until 12 months after publication by request of the publisher.
Restriction lift date:
2020-05-30
Citation:
Wysoczanski, R., Leonard, G., Gill, J., Wright, I., Calvert, A., McIntosh, W., Jicha, B., Gamble, J., Timm, C., Handler, M., Drewes, E. and Zohrab, A. (In press) 'Ar-Ar age constraints on the timing of Havre Trough opening and magmatism', New Zealand Journal of Geology and Geophysics.
Abstract:
The age and style of opening of the Havre Trough back-arc system is uncertain due to a lack of geochronologic constraints for the region. 40Ar/39Ar dating of 19 volcanic rocks from across the southern Havre Trough and Kermadec Arc was conducted in three laboratories to provide age constraints on the system. The results are integrated and interpreted as suggesting that this subduction system is young (< 2 Ma) and coeval with opening of the continental Taupo Volcanic Zone of New Zealand. Arc magmatism was broadly concurrent across the breadth of the Havre Trough.
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