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40Ar/39Ar Age Determination 16D16281 (IESS10094 - Rachel Seamount)
File Name IESS10094.16D16281.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.37 MB - 4 files [ pdf,xls,age,xml ]
Expert Level State-of-the-art Science
Contributor Susan Schnur
This upload contains the 40Ar/39Ar geochronology age determination of sample MV1203-D22-05 from Rachel Seamount in Walvis Ridge and was calculated using the ArArCALC freeware. The preferred age of 39.04 ± 0.01 Ma is the age plateau and is interpreted as the eruption age of the sample. Steps form wavy pattern, mid-T yields a slightly bumpy but acceptable plateau. The age determination was carried out on a sample of tephrite (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 (7B2-15) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Anthony Koppers ( Sample Description: Standard. Sample Treatment: Aphanitic, highly vesicular basalt. Fresh GM, sparsely ol-phyric..
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