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40Ar/39Ar Age Determination 16D06785 (IEKK1-HO-AT-01 - Marquesas Islands)
File Name IEKK1-HO-AT-01.16D06785.pdf
Data Type spreadsheet
Computer Program ArArCALC 2.7.0
File Size 1.28 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-HO-AT-01/
Description
This upload contains the 40Ar/39Ar geochronology age determination of sample HO-AT-01 from Marquesas Islands in French Polynesia and was calculated using the ArArCALC freeware. The preferred age of 2.1614 ± 0.0011 Ma is the age plateau and is interpreted as the eruption age of the sample. The groundmass produced a high precision, long plateau which was a function of a K rich groundmass. Some earlier steps included in the plateau show some decreasing apparent age patterns but are still within the uncertainity of the plateau. Therefore, those steps are conservatively included in the age result. 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 (6A3-15) (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: Atuona Bay, Hiva Oa Island, Marquesas Islands, French Polynesia. Lat/Long/Elevation is approximate. .
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