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Description
This upload contains the 40Ar/39Ar geochronology age determination of sample 44A-ARGON-2 from Floreana Island in Galapagos and was calculated using the ArArCALC freeware. The preferred age of 0.9277 ± 0.0036 Ma is the age plateau and is interpreted as the eruption age of the sample. A reliable plateau with low and high temp recoil. The age determination was carried out on a sample of basalt (groundmass) 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-3 (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Andrea Balbas (Balbasam@caltech.edu). Sample Description: 1x leaching. Sample Treatment: A lava flow from Floreana Island, Galapagos. Location Description: Floreana Island, Galapagos. Site GA79 (Rochette et al. 1997; Kent et al. 2010) aka G44 (Cox and Dalrymple 1966). . |
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Geological Age Range and Timescale
0.3275 - 0.3275 Ma |
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Location
1º 16.38' S - 1º 16.38' S 90º 29.28' W - 90º 29.28' W, Ecuador, 44A-Argon-2, Pacific Ocean, Galapagos Plate |
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Instructions
This ERDA upload contains four separate 40Ar/39Ar age calculation files generated with ArArCALC. Both the XLS and PDF files are for easy viewing in Microsoft Excel or Adobe Acrobat Reader, whereas the AGE file is readable by the ArArCALC software only and the XML file is generated for the GEOCHRON online database project. For full age calculation functionality it is recommended that you open the AGE file in the ArArCALC software that is available as freeware online at http://earthref.org/ArArCALC ... |
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Keywords
40Ar/39Ar, Geochronology, Radiometric Age Dating, K/Ar, Argon, Mass Spectrometry, ArArCALC, Data Reduction, IEKK1-44A-ARGON-2A (IGSN), 13D08071 (Experiment), GALAPAGOS, BALBAS (13-19) (Project), Manual (Collection Method), Individual Sample (Collection Object), Igneous>Volcanic>Mafic (Rock Classification), Groundmass (Mineral Type), 150-180 µm (Grain Size), Floreana Island mg (Sample Weight), Lava Flow (Feature Type) |
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