EarthRef.org Digital Archive (ERDA) -- 40Ar/39Ar Age Determination 18D22522 (10.58052/OSU-KM1609-D7-2.AK1

Description
This upload contains the 40Ar/39Ar geochronology age determination of sample KM1609-D7-2 (OSU-KM1609-D7-2.AK1) from Pacific in Ellice Basin (Ellice Basin, Pacific Ocean) and was calculated using the ArArCALC freeware. The preferred age of 78.19 ± 0.34 Ma is the age plateau and is interpreted as the alteration age of the sample. Alteration age The age determination was carried out on a sample of basalt (plagioclase) 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 (4F38-18) (sanidine) with an age of 28.201 ± 0.082 Ma. This sample was collected by Paul Wessel (pwessel@hawaii.edu). Sample Description: Standard full leach + 5 min 5% HF. Sample Treatment: whole rock.

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 ...

Keywords
40Ar/39Ar, Geochronology, Radiometric Age Dating, K/Ar, Argon, Mass Spectrometry, ArArCALC, Data Reduction, 10.58052/OSU-KM1609-D7-2.AK1 (IGSN), 10.58052/OSU-KM1609-D7-2 (Parent IGSN), 18D22522 (Experiment), ELLICE BASIN, DAVIDSON (16-INT-01) (Project), Dredging>Chain Bag (Collection Method), Ship (Platform Type), Grab (Collection Object), Igneous>Volcanic>Mafic (Rock Classification), Phenocryst (Mineral Type), Plagioclase (Mineral Name), 180-250 µm (Grain Size), 32.9 mg (Sample Weight), Deep Ocean Floor (Feature Type)