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Detailed File Information
40Ar/39Ar Age Determination 07C1112 (KOP000053 - Manatu)
File Name KOP000053.07C1112.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.5.1
File Size 901.00 KB - 4 files [ pdf,xls,age,xml ]
Expert Level State-of-the-art Science
Contributor Anthony A.P. Koppers
Source Koppers et al. 2011
http://earthref.org/erda/KOP000053
Description
This upload contains the 40Ar/39Ar geochronology age determination of sample MAN-1 3E5-06 (ALIA 126-06) from Manatu and was calculated using the ArArCALC freeware. The preferred age of 4.19 ± 0.34 Ma is the age plateau and is interpreted as the eruption age of the sample. A good age plateau that is concordant with the inverse and normal isochron ages. Relatively large error bars on individual incremental heating steps because this a relatively young submarine basalt sample. The effects of alteration are visible in the apparently higher ages for the low temperature incremental heating steps. The age determination was carried out on a sample of basalt (groundmass 125-300µm) in an incremental heating experiment and using the bulk laser heating extraction method. The analyses were run on a MAP215-50 mass spectrometer and the ages were calculated relative to flux monitor FCT-3 (biotite) with an age of 28.030 ± 0.010 Ma. This sample was collected by Stan Hart (shart@whoi.edu).
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