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40Ar/39Ar Age Determination 14D30658 (IESS10038 - Harpooner Guyot)
File Name IESS10038.14D30658.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.12 MB - 4 files [ pdf,xls,age,xml ]
Expert Level State-of-the-art Science
Contributor Susan Schnur
Source http://earthref.org/ERDA/IESS10038/
Description
This upload contains the 40Ar/39Ar geochronology age determination of sample MV1203-D56-22 from Harpooner Guyot in Walvis Ridge and was calculated using the ArArCALC freeware. The preferred age of 35.35 ± 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 trachyte (alkali-feldspar) 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 (4B20-14) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Anthony Koppers (akoppers@ceoas.oregonstate.edu). Sample Description: Standard + heavy liquid separation.. Sample Treatment: Fine-grained, avesicular basalt. Moderatley altered GM, sparsely cpx-plag-phyric, trace hbl and bt phenox..
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