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Ar-Ar age constraints on the timing of Havre Trough opening and magmatism

October 19, 2019

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.

Citation Information

Publication Year 2019
Title Ar-Ar age constraints on the timing of Havre Trough opening and magmatism
DOI 10.1080/00288306.2019.1602059
Authors Richard Wysoczanski, Graham S. Leonard, James F. Gill, Ian Wright, Andrew T. Calvert, William McIntosh, Brian Jicha, John A Gamble, Christian Timm, Monica Handler, Elizabeth Kathleen Drewes, Alex Zohrab
Publication Type Article
Publication Subtype Journal Article
Series Title New Zealand Journal of Geology and Geophysics
Index ID 70215419
Record Source USGS Publications Warehouse
USGS Organization Volcano Science Center