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Detailed File Information
40Ar/39Ar Age Determination 15D04484 (IEKK1-FH-TOP - Marquesas Islands)
File Name IEKK1-FH-TOP.15D04484.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.41 MB - 4 files [ pdf,xls,age,xml ]
Expert Level State-of-the-art Science
Contributor Kevin Konrad
Source Konrad et al. 2018
http://earthref.org/ERDA/IEKK1-FH-TOP/
Description
This upload contains the 40Ar/39Ar geochronology age determination of sample FH-TOP from Marquesas Islands in French Polynesia and was calculated using the ArArCALC freeware. The preferred age of 1.4535 ± 0.0028 Ma is the age plateau and is interpreted as the eruption age of the sample. The plateau begins with a few low radiogenic Ar steps with erradic apparent ages. The plateau than becomes consistant until the highest temperature steps where the age decreases as a function of high temperature recoil. The age determination was carried out on a sample of basalt (groundmass) in an incremental heating experiment and using the in situ 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 (R98) (4C26-14) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Kevin Konrad (Konradke@oregonstate.edu). Sample Description: 1x leach. Sample Treatment: Individual handsample from the Marquesas Islands. . Location Description: Omoa Bay, Fatu Hiva Island, Marquesas Islands, French Polynesia. Lat/Long/Elevation is approximate. .
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