Geological constraints and 26Al–10Be burial dating isochrons
Article first published online: 11 JAN 2011
Copyright © 2011 John Wiley & Sons, Ltd.
Earth Surface Processes and Landforms
Volume 36, Issue 7, pages 946–952, 15 June 2011
How to Cite
Muzikar, P. (2011), Geological constraints and 26Al–10Be burial dating isochrons. Earth Surf. Process. Landforms, 36: 946–952. doi: 10.1002/esp.2124
- Issue published online: 27 MAY 2011
- Article first published online: 11 JAN 2011
- Manuscript Accepted: 22 NOV 2010
- Manuscript Revised: 21 OCT 2010
- Manuscript Received: 30 MAR 2010
- cosmogenic nuclides;
The 26Al–10Be burial dating method has been applied to a range of problems in geochronology. This technique allows us to determine the burial age of quartz-containing sediments, by measuring the concentration of cosmogenic 10Be and 26Al in the quartz. In its most basic form, the method assumes a simple history (single exposure episode followed by burial) for the quartz clasts. Balco and Rovey have recently developed an innovative isochron version of this method, which can take into account a more complicated exposure history for the quartz, and used it to date a series of glacial tills. There can be constraints on the slope and intercept of the isochron, depending on how we model the geology of the Balco–Rovey approach. We show how to take these constraints into account when fitting the slope and intercept; we apply a Bayesian approach, in which there is a straightforward way to implement constraints. We discuss the important issues that arise; a variety of choices must be made in choosing the prior, both in what geological insights to include and in how to include them. Copyright © 2011 John Wiley & Sons, Ltd.