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40Ar/39Ar Age Determination 16D14821 (IESS10087 - Right Guyot)
File Name IESS10087.16D14821.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.19 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-D27-08 from Right Guyot in Walvis Ridge and was calculated using the ArArCALC freeware. The preferred age of 33.55 ± 0.01 Ma is the age plateau and is interpreted as the eruption age of the sample. Low-T shows recoil effect but high-T steps yield a decent plateau. The age determination was carried out on a sample of trachyte (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 (7B15-15) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Anthony Koppers ( Sample Description: Standard. Sample Treatment: Aphanitic avesicular basalt. Completely altered GM, sparsely plag-phyric, tr cpx phenox. Trachyte composition unconfirmed - assumed based on mineralogy..
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