Journal article
The Fish Canyon Tuff: A new look at an old low-temperature thermochronology standard
A Gleadow, M Harrison, B Kohn, R Lugo-Zazueta, D Phillips
Earth and Planetary Science Letters | Published : 2015
Abstract
The Fish Canyon Tuff (FCT) has served as an important source for geochronology standards, particularly for fission track, K-Ar and (40Ar/39Ar) dating, even though efforts to establish precise ages for its constituent minerals have proved to be unexpectedly complex. To evaluate the suitability of FCT apatite as a standard for apatite (U-Th-Sm)/He (AHe) thermochronometry, and to test underlying assumptions about its suitability for apatite fission track (AFT) thermochronometry, we analysed samples from a series of sites throughout the vertical and lateral extent of the host ignimbrite sheet. Samples were collected from the relatively lithic-rich, classic sampling location in the lower part of ..
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Grants
Awarded by National Science Foundation
Funding Acknowledgements
The ion microprobe facility at the University of California, Los Angeles, is partly supported by a grant from the Instrumentation and Facilities Program, Division of Earth Sciences, National Science Foundation. N9547N provided outstanding logistic support during fieldwork. Abaz Alimanovic is thanked for technical support for mineral separations, helium analyses, and,solution ICP-MS analyses. Christian Seiler and Ling Chung provided valuable assistance with various aspects of the fission track analyses and LA-ICP-MS analyses. We also thank two anonymous reviewers for their constructive comments. The Automated Fission Track Analysis Facility at the University of Melbourne was developed with support from Australian Research Council Grants LP0348767 and LE0882818 and additional operational and equipment funding from the National Collaborative Research Infrastructure Strategy Au Scope program and the Education Investment Fund AGOS program.