Authors
Allen J Schaen, Brian R Jicha, Kip V Hodges, Pieter Vermeesch, Mark E Stelten, Cameron M Mercer, David Phillips, Tiffany A Rivera, Fred Jourdan, Erin L Matchan, Sidney R Hemming, Leah E Morgan, Simon P Kelley, William S Cassata, Matt T Heizler, Paulo M Vasconcelos, Jeff A Benowitz, Anthony AP Koppers, Darren F Mark, Elizabeth M Niespolo, Courtney J Sprain, Willis E Hames, Klaudia F Kuiper, Brent D Turrin, Paul R Renne, Jake Ross, Sebastien Nomade, Hervé Guillou, Laura E Webb, Barbara A Cohen, Andrew T Calvert, Nancy Joyce, Morgan Ganerød, Jan Wijbrans, Osamu Ishizuka, Huaiyu He, Adán Ramirez, Jörg A Pfänder, Margarita Lopez-Martínez, Huaning Qiu, Brad S Singer
Publication date
2021/3/1
Journal
GSA Bulletin
Volume
133
Issue
3-4
Pages
461-487
Publisher
GeoScienceWorld
Description
The 40 Ar/39 Ar dating method is among the most versatile of geochronometers, having the potential to date a broad variety of K-bearing materials spanning from the time of Earth’s formation into the historical realm. Measurements using modern noble-gas mass spectrometers are now producing 40 Ar/39 Ar dates with analytical uncertainties of∼ 0.1%, thereby providing precise time constraints for a wide range of geologic and extraterrestrial processes. Analyses of increasingly smaller subsamples have revealed age dispersion in many materials, including some minerals used as neutron fluence monitors. Accordingly, interpretive strategies are evolving to address observed dispersion in dates from a single sample. Moreover, inferring a geologically meaningful “age” from a measured “date” or set of dates is dependent on the geological problem being addressed and the salient assumptions associated with each set …
Scholar articles
AJ Schaen, BR Jicha, KV Hodges, P Vermeesch… - GSA Bulletin, 2021