Single crystal laser fusion

As pointed out by Swisher and Prothero (1990) relatively recent advances (1989-1990) in mass spectrometric techniques and the development of laser-fusion 40Ar/39Ar dating techniques have resulted in the ability to date individual volcanic crystals, Multiple analysis and the ability to date single crystals allow the identification of multiplc-agc components due to detrital contamination, and thus permit improved precision and accuracy. To date, studies have been directed to North American chronology, notably minerals (biotite, anor, plag) found in Nebraska and Wyoming. 

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