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40Ar/39Ar Age Determination 14D34764 (IESS10048 - Maybe Seamount)
File Name IESS10048.14D34764.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.22 MB - 4 files [ pdf,xls,age,xml ]
Expert Level State-of-the-art Science
Contributor Susan Schnur
Source http://earthref.org/ERDA/IESS10048/
Description
This upload contains the 40Ar/39Ar geochronology age determination of sample MV1203-D61-06A from Maybe Seamount in Walvis Ridge and was calculated using the ArArCALC freeware. The preferred age of 42.54 ± 0.01 Ma is the age plateau and is interpreted as the eruption age of the sample. Good plateau The age determination was carried out on a sample of phonolitic-tephrite (biotite) 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 (R98) (4B34-14) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Anthony Koppers (akoppers@ceoas.oregonstate.edu). Sample Description: Standard but no leaching.. Sample Treatment: Fine-grained, moderately vesicular basalt. Highly altered GM, moderately plag-phyric, sparsely cpx-phyric, tr bt phenox..
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