Filters: Tags: Age date (X)
3,265 results (36ms)|
Filters
Date Range
Extensions Categories |
Argon analysis were done by isotopic dilution. Potassium was determined by flame photometry, using a lithium metaborate fusion technique.
Categories: Physical Item;
Tags: Age date
Determined using stadard isotope dilution techniques for extraction and measurement of argon and flame photometry for potassium.
Categories: Physical Item;
Tags: Age date
K analyzed by G. Edsall, Kristina Ahlnas, and Diane Duvall with a digital flame photometer (Instrumentataion Laboratories, model 343) using the LiBO2 flux fusion technique and mineral calibration standards. Ar analyzed and ages calculated by Donald Turner, Wilfred Davis and Diane Duval using isotopic dilution, using 38Ar tracers, and a mass spectrometer (152.4-cm radius) (Nuclide Corporation) equipped with automated peak stepping and a digital data-acquisition system.
Categories: Physical Item;
Tags: Age date
Whole rock and mineral concentrates were split and analyzed separately for potassium and argon. Potassium was analyzed by a lithium metaborate flame photometry technique. Argon was analyzed standard techniques of isotope dilution and mass spectrometry.
Categories: Physical Item;
Tags: Age date
Potassium content was analyzed by flame photometry, using a lithium metaborate fusion technique in which the lithium seerves as an internal standard. Argon was extracted and analyzed by standard methods of isotope dilution and mass spectrometry.
Categories: Physical Item;
Tags: Age date
|
|
