We present a method for 40Ar/39Ar step-heating measurements on anhydrous K-bearing minerals. Samples placed in dimples on Ta foil platforms are heated indirectly with a laser while temperatures are measured with a two-color pyrometer. The system provides a simple, inexpensive, and reliable means for the heating of samples as small as a few to tens of micrograms. Results for plagioclase separates from the Rustenburg Layered Suite of the circa 2.06 Ga Bushveld Complex closely match previously published data.
All Science Journal Classification (ASJC) codes
- Geochemistry and Petrology