Ar-Ar age constraints on the timing of Havre Trough opening and magmatism
Type of content
Journal Article
UC permalink
Publisher's DOI/URI
Thesis discipline
Degree name
Publisher
Informa UK Limited
Journal Title
Journal ISSN
Volume Title
Language
English
Date
2019
Authors
Wysoczanski R
Leonard G
Gill J
Wright I
Calvert A
McIntosh W
Jicha B
Gamble J
Timm C
Handler M
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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Citation
Wysoczanski R, Leonard G, Gill J, Wright I, Calvert A, McIntosh W, Jicha B, Gamble J, Timm C, Handler M, Drewes-Todd E, Zohrab A Ar-Ar age constraints on the timing of Havre Trough opening and magmatism. New Zealand Journal of Geology and Geophysics. 1-7.
Keywords
Havre Trough, Kermadec Arc, Ar-Ar geochronology, back-arc basin, rifting, magmatism
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::37 - Earth sciences::3705 - Geology::370512 - Volcanology
Field of Research::04 - Earth Sciences::0403 - Geology::040313 - Tectonics
Field of Research::04 - Earth Sciences::0403 - Geology::040313 - Tectonics