This page is for the promotion of sharing and cooperation between labs united under the common goals of EARTHTIME. It should be used for the posting of longer technique-oriented papers, data templates, suggestions etc. Dialogue should still be done on the FORUM page. Please submit content for this page to Sam Bowring

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This 1.19 Ma 40Ar/39Ar standard is in large scale preparation for distribution to interested labs. Small aliquots (ca. 5 gm) are currently available; larger ones will be available within about 3 months. Contact Paul Renne if you are interested. IMPORTANT: Please use "Alder" in the subject line of any email to facilitate searching and spam-blocker obviation.

These templates for Ar-Ar (and U-Pb)ž were discussed by Anthony Koppers at the EARTHTIME II workshop (see post on Ar-Ar forum).ž Please compare both versions and discuss on Ar-Ar forum.

This version was presented during EARTHTIME II workshop in which the ⁴⁰Ar/³⁹Ar definition is based on the total 40/39, 38/39, 37/39 and 36/39 ratios only and not the intercept values.ž Use this version for testing out the RiG Console Software which allows you to manage all data and metadata.ž One example file has been included and one RiG format text file.

This includes baseline, blank- and fractionation-corrected intercept values and optionally procedure blanks in the ARAR measurements table.