Articles | Volume 9, issue 5
https://doi.org/10.5194/se-9-1123-2018
https://doi.org/10.5194/se-9-1123-2018
Research article
 | 
25 Sep 2018
Research article |  | 25 Sep 2018

Constraints on Alpine Fault (New Zealand) mylonitization temperatures and the geothermal gradient from Ti-in-quartz thermobarometry

Steven B. Kidder, Virginia G. Toy, David J. Prior, Timothy A. Little, Ashfaq Khan, and Colin MacRae

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Steven Kidder on behalf of the Authors (18 Jul 2018)
ED: Publish subject to minor revisions (review by editor) (27 Aug 2018) by Renée Heilbronner
AR by Steven Kidder on behalf of the Authors (28 Aug 2018)  Author's response   Manuscript 
ED: Publish subject to technical corrections (03 Sep 2018) by Renée Heilbronner
ED: Publish subject to technical corrections (03 Sep 2018) by Federico Rossetti (Executive editor)
AR by Steven Kidder on behalf of the Authors (04 Sep 2018)  Author's response   Manuscript 
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Short summary
By quantifying trace concentrations of titanium in quartz (a known geologic “thermometer”), we constrain the temperature profile for the deep crust along the Alpine Fault. We show there is a sharp change from fairly uniform temperatures at deep levels to a very steep gradient in temperature in the upper kilometers of the crust.