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40Ar-39Ar method

Turner G (1969) Thermal histories of meteorites by the 39Ar-40Ar method. In Millman PM (ed) Meteorite Research. D. Reidel Publishing, Dordrecht, The Netherlands, p 407-417 Turner G (1970a) Thermal histories of meteorites. In Runcorn SK (ed) Paleogeophysics. Academic Press, London, p 491-502 [Pg.817]

Duffell, H. (1999) Contribution gdochronologique h la stratigraphic volcanique du Massif des Monts Dore par la methode 40Ar/39Ar. D.E.A. Univ. Clermont-Ferrand. [Pg.705]

The Ar/" °Ar method is a variant on the " °K/" °Ar method. For deteimination of the amount of K present in the sample, neutron activation is applied. The sample and a standard of known age (i.e. containing a known ratio °Ar °K) are irradiated under the same conditions at a neutron flux density of about 10 " cm s for about 1 day. Ar is produced by the nuclear reaction K(n,p) Ar and the ratio 39Ar 40Ar is measured by MS. Because the half-life of Ar is rather long (h /2 = 269 y), its decay after the end of irradiation can be neglected. From the relation [Pg.333]

See other pages where 40Ar-39Ar method is mentioned: [Pg.239]    [Pg.240]    [Pg.242]    [Pg.242]    [Pg.304]    [Pg.265]    [Pg.69]    [Pg.71]    [Pg.72]    [Pg.383]    [Pg.143]    [Pg.264]    [Pg.266]    [Pg.335]    [Pg.2]    [Pg.82]    [Pg.434]    [Pg.27]    [Pg.143]    [Pg.149]    [Pg.150]    [Pg.150]    [Pg.2]    [Pg.2]   
See also in sourсe #XX -- [ Pg.69 , Pg.70 , Pg.71 , Pg.72 , Pg.73 ]



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