John W. Valley
Charles R. Van Hise Professor
Stable Isotope Geochemistry and Metamorphic Petrology
(608) 263-5659
Email: valley@geology.wisc.edu
Office: 345 Weeks Hall
John Valley-Home | John Valley – CV | WiscSIMS | Stable Isotope Lab | Early Earth & Zircon Research | Early Earth & Zircon Reprints | Useful Links
Early Earth & Zircon Research
WiscSIMS, Zircon Research News (March 2014)
Early Earth & Zircon Research- Reprints
Zircons are Forever (created 2005)
A Cool Early Earth (created 2002)
Cavosie2019JHReview Cavosie AJ, Valley JW, Wilde SA(2019) The Oldest Terrestrial Mineral Record: Thirty Years of Research on Hadean Zircon From Jack Hills, Western Australia. In: Earth’s Oldest Rocks. MJ Van Kranendonk (ed.), Elsevier, p 255-278. doi.org/10.1016/B978-0-444-63901-1.00012-5
Valley2015APT Valley JW, Reinhard DA, Cavosie AJ, Ushikubo T, Lawrence DF, Larson DJ, Kelly TF, Snoeyenbos D, Strickland A (2015) Nano- and Micro-geochronology in Hadean and Archean Zircons by Atom-Probe Tomography and SIMS: New Tools for Old Minerals. Am. Mineral, 100: 1355-1377. doi.org/10.2138/am-2014-5134.
Valley et al 2014, Nature Geoscience
Valley, J. W., A. J. Cavosie, T. Ushikubo, D. A. Reinhard, D. F. Lawrence, D. J. Larson, P. H. Clifton, T. F. Kelly, S. A. Wilde, D. E. Moser, and M. J. Spicuzza (2014), Hadean age for a post-magma-ocean zircon confirmed by atom-probe tomography, Nature Geoscience vol. 7, p 219-223.
http://dx.doi.org/10.1038/ngeo2075
Nature Geoscience, Feb. 23, 2014 (PDF)
App. 1 – 6 PDF
Appendix 7: oxygen three-isotope analyses (Excel file)
News & Views by Samuel Bowring (PDF)
Selected Web Sites (March 2014)
Ars Technica Article by Scott Johnson (MS in Geology, UW-Madison)
UW News
Videos at:
Slate
CNN World News

Atom Probe Tomography- Movies:
3-D rotating images of Pb (207Pb and 206Pb only) and Y measured by APT in specimen #2 from the core of zircon 01JH36-69 from Jack Hills, Western Australia. Scale in nm with no vertical exaggeration.
Atoms of Y including background for the full 1000-nm-long specimen shown in Fig. 3A.
Y & Pb for the enlarged ~100 nm domain shown in Fig. 3B. Only data from within the 3-at.% Y contour are shown to accentuate clusters.