Uplift in the Fiordland Region, New Zealand: Implications for Incipient Subduction
Abstract
Low-temperature thermochronometry reveals regional Late Cenozoic denudation in Fiordland, New Zealand, consistent with geodynamic models showing uplift of the overriding plate during incipient subduction. The data show a northward progression of exhumation in response to northward migration of the initiation of subduction. The locus of most recent uplift coincides with a large positive Bouguer gravity anomaly within Fiordland. Thermochronometrically deduced crustal thinning, anomalous gravity, and estimates of surface uplift are all consistent with ∼2 kilometers of dynamic support. This amount of dynamic support is in accord with geodynamic predictions, suggesting that we have dated the initiation of subduction adjacent to Fiordland.
Additional Information
© 2003 American Association for the Advancement of Science. Received for publication 21 June 2002; accepted for publication 12 August 2002. Supported by NSF grant EAR-0003558 to M. A. H. and M. G. We thank J. Braun for discussions and J. Braun and T. Ehlers for access to software used in the modeling. Comments from three anonymous reviewers greatly improved the manuscript.Attached Files
Supplemental Material - 1075328s.pdf
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Additional details
- Eprint ID
- 35819
- DOI
- 10.1126/science.1075328
- Resolver ID
- CaltechAUTHORS:20121205-103634787
- NSF
- EAR-0003558
- Created
-
2012-12-05Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Seismological Laboratory