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borttagen - 40Ar/39Ar Geochronology Laboratory

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The ⁴⁰Ar/³⁹Ar method is a tremendously versatile and powerful geochronometer which has been used to date K-bearing rocks and minerals as young as a few 10’s of thousands of years to the oldest rocks on Earth. Argon for ⁴⁰Ar/³⁹Ar analysis can be released either by step-heating a sample (single grain or rock aggregate) using a furnace or a defocused laser and by in-situ Laser Ablation of a small ≥ 2 micron spot.