Cosmogenic Nuclide Laboratory and Geomorphology Research Group
Methods we use in the UVM Cosmogenic Lab
With the completion of the rebuilt laboratory, we are changing many of our sample preparation and extraction methods. They will be posted here as we complete method revision.
Rock and sediment are prepared in our rock room on the first floor before being taken upstairs to the mineral separation laboratory for quartz isolation. Here we crush, grind, sieve, wash and magnetically separate materials as well as pulverize material for meteoric 10-Be analysis.
Download Rock Room Lab Safety Manual with methods (PDF, revision 9/6/08)
Quartz is extracted from rock and sediment using a series of physical and chemical treatments.
Download Quartz Purification Lab Safety Manual with methods (PDF, revision 1/21/13)
The extracted quartz is tested for purity and re-purified until the impurity level has stabilized at levels usually less than 100 ppm.
Download Quartz Purity testing method (PDF, revision 6/13/13)
Be-10 and Al-26 present in the quartz mineral lattice are extracted using a multi-acid dissolution followed by anion and cation exchange and pH-specific precipitation to separate and purify Al and Be from other cations and to reduce boron levels so that precise and accurate AMS measurements can be made.
Download Be/Al extraction method (PDF, revision 06/18/13) .
Be-10 adhered to the surface of sediment and soil grains is extracted using a flux method modified from that developed and perfected by John Stone at the University of Washington.
Download Meteoric Be extraction method, (PDF, revision 6/13/13).
You can click here to access the methods we used over the past decade (until the lab fire in 2007). Additionally, you can download some methods below that helped us design the protocols we used with great success until 2007.
Chapters on pertinent Elements from Handbook of Geochemistry
Last modified June 18 2013 11:49 AM