Folders: ROOT > ScienceBase Catalog > ReSciColl Archive > Alaska Division of Geological & Geophysical Surveys > Collection of radiometric age data from Alaska ( Show all descendants )
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ROOT _ScienceBase Catalog __ReSciColl Archive ___Alaska Division of Geological & Geophysical Surveys ____Collection of radiometric age data from Alaska Filters
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K20 measurements were made in duplicate on each of two separate splits of sample powder by flame photometry after lithium metaborate fusion and dissolution. Ar analyses were by isotope-dilution mass spectrometry using a high-purity (>99.9%), 38Ar tracer. All samples for Ar extraction were baked overnight at 280
Categories: Physical Item;
Tags: Age date
Standard isotope dilution techniques were used for the argon determinations; the potassium determinations were done by flame photometry using a lithium internal standard.
Categories: Physical Item;
Tags: Age date
Potassium was determined by flame photometry using a lithium metaborate fusion technique (Engels and Ingamells, 1970). Argon extraction and measurement was accomplished using standard techniques of isotope dilution mass spectrometry, as described by Dalrymple and Lanphere (1969).
Categories: Physical Item;
Tags: Age date
Lead isotopic compositoins, measured on an NBS 30.5 cm mass spectrometer
Categories: Physical Item;
Tags: Age date
K analyzed with an Instrumetation Laboratories Model 343 digital flame photometer, using the LiBO2 fluxfusion technique and mineral calibration standards, by Genevieve Edsall. Ar was determined by isotope dilution using Ar38 tracers and a six inch radius Nuclide mass spectrometer equipped with automated peak steppping and digital data acquisition system, by D.L. Turner and Wilfrid D. Davis.
Categories: Physical Item;
Tags: Age date
K analyzed with an Instrumetation Laboratories Model 343 digital flame photometer, using the LiBO2 fluxfusion technique and mineral calibration standards, by Genevieve Edsall. Ar was determined by isotope dilution using Ar38 tracers and a six inch radius Nuclide mass spectrometer equipped with automated peak steppping and digital data acquisition system, by D.L. Turner and Wilfrid D. Davis.
Categories: Physical Item;
Tags: Age date
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