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40Ar/39Ar Age Determination 16D05392 (IESS10057 - Beluga Seamount)
File Name IESS10057.16D05392.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.38 MB - 4 files [ pdf,xls,age,xml ]
Expert Level State-of-the-art Science
Contributor Susan Schnur
Source http://earthref.org/ERDA/IESS10057/
Description
This upload contains the 40Ar/39Ar geochronology age determination of sample MV1203-D08-05 from Beluga Seamount in Walvis Ridge and was calculated using the ArArCALC freeware. The preferred age of 66.35 ± 0.04 Ma is the age plateau and is interpreted as the eruption age of the sample. Excess argon signature, tiny plateau at low-T and and another slightly higher. Broader plateau selected.
The age determination was carried out on a sample of trachybasalt (groundmass) in an incremental heating experiment and using the bulk laser heating extraction method. The analyses were run on a ARGUS-VI mass spectrometer and the ages were calculated relative to flux monitor FCT-NM (7A12-15) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Anthony Koppers (akoppers@ceoas.oregonstate.edu). Sample Description: Standard. Sample Treatment: Medium-grained, sparsely vesicular basalt. Moderately altered GM, sparsely ol-phyric..
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