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40Ar/39Ar analysis of sample SEG 03 64


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At the University of Wisconsin Rare Gas Geochronology Laboratory, the groundmass packets and mini-cores were ncrementally heated in a double-vacuum resistance furnace attached to a 300 cm3 gas clean-up line. Prior to each incremental-heating experiment, samples were heated to 500-675 �C and pumped to remove potentially large amounts of atmospheric argon and water (Baksi, 1974). Fully automated experiments consisted of 4-10 steps from 675-1450 �C; each step included a 2 min increase to the desired temperature that was maintained for 10-15 min. During the heating time, and for an additional 5-8 min afterward, the sample gas was exposed to three SAES C50 Zr-Al getters. Isotopic measurements and data reduction followed the procedures of [...]

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title Parent-4f4e49d8e4b07f02db5df185 40Ar/39Ar analysis of sample SEG 03 64

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alternateGeometryThe coordinates are represented in North American Datum of 1927 (NAD27). Location was derived from the following method(s): Location provided in Jicha, B.R. and Singer, B.S., 2006, GSA Bulletin, v. 118, no. 7/8, p. 808-822

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