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40Ar/39Ar Age Determination 16D07164 (IESS10066 - Bulkington East)
File Name IESS10066.16D07164.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.09 MB - 4 files [ pdf,xls,age,xml ]
Expert Level State-of-the-art Science
Contributor Susan Schnur
Source http://earthref.org/ERDA/IESS10066/
Description
This upload contains the 40Ar/39Ar geochronology age determination of sample MV1203-D15-07 from Bulkington East in Walvis Ridge and was calculated using the ArArCALC freeware. The preferred age of 65.26 ± 0.07 Ma is the age plateau and is interpreted as the eruption age of the sample. Low-T shows recoil but high-T yields a decent plateau. The age determination was carried out on a sample of trachyte (k-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 (7A27-15) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Anthony Koppers (akoppers@ceoas.oregonstate.edu). Sample Description: Standard + heavy liquid separation.. Sample Treatment: Aphanitic, sparsely vesicular basalt. Highly altered GM, highly cpx-phyric. Trachyte composition unconfirmed - assumed based on mineralogy..
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