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Potassium-argon dating

The determination of the potassium-argon age of rock involves the following experimental stages  [Pg.52]

Isolating the potassium-40 and argon-40 in the sample from the rest of the mineral matter [Pg.52]

Determining the relative amounts of these elements in the sample [Pg.52]

Calculating the potassium-argon date of the mineral or rock [Pg.52]

Experience shows that samples weighing 0.2-20g are usually sufficient for dating by this method. The determination of potassium-40 is, at present. [Pg.52]

Potassium-argon dating is based on the nuclear decay of... [Pg.663]

Ruxton, B. P. and McDougall, I. (1967) Denudation rates in northeast Papua from potassium-argon dating of lavas. Am. ]. Sci. 265,545-561. [Pg.193]

The logic underlying carbon-14 dating differs from that for potassium-argon dating. Recall that bombardment of... [Pg.1606]

The Juan Fernandez Islands, Chile, he east of the South American mainland at approximately 33°30 S, 80°W (Fig. 6.8). The archipelago consists of two main islands, Masatierra, which lies about 660 km from the mainland, and Masafuera, which lies 150km further west. A third, small island, Santa Clara, lies off the western end of Masatierra and probably was attached to Masatierra at one time. The ages of the islands have been determined using potassium-argon dating methods to be 5.8 2.1 million years for Santa Clara 4.23 0.16 million years for Masatierra and 2.44 0.14 million years for Masafuera (Stuessy et ah, 1984). [Pg.263]

Stuessy, T. F., Foland, K. A., Sutter, J. F., Sanders, R. W. and Silva, O. M. 1984. Botanical and geological significance of potassium-argon dates from the Juan Fernandez Islands. Science 225 49-51. [Pg.331]

Curtis GH, Hay RL (1972) Further geological studies and potassium-argon dating at Oludvai Gorge and Ngorongoro Crater. In Calibration of Hominid Evolution. Bishop WW, Miller JA (eds), Scottish Academic Press, Edinburgh... [Pg.627]

Knowing the total amounts of potassium-40 and of radiogenic argon-40 in a sample enables one to calculate first, their relative weight amounts and then, from these values, the age of the sample. The reliability of a potassium-argon date is generally expressed as a plus or minus value after the calculated date. [Pg.78]

Evemden, J. F. and G. H. Curtis (1965), The potassium-argon dating of late Cenozoic rocks in East Africa and Italy, Current Anthropol. 6, 343-385. [Pg.573]

Guillot, P. Y. and Y. Comette (1986), The Cassignoll technique for potassium-argon dating, precision and accuracy Examples from the late Pleistocene to recent vol-canics from southern Italy, Client. Geol. (Isotopes Geoscience Section) 59, 205-222. [Pg.581]

Dalrymple G. B. and Lanphere M. A. (1969). Potassium-Argon Dating W. H. Freeman, San Erancisco. [Pg.826]

Merrihue C. and Turner G. (1966). Potassium-argon dating by activation with fast neutrons. J. Geophys. Res., 71 2852-2857. [Pg.844]

See other pages where Potassium-argon dating is mentioned: [Pg.368]    [Pg.206]    [Pg.66]    [Pg.66]    [Pg.75]    [Pg.75]    [Pg.76]    [Pg.76]    [Pg.79]    [Pg.80]    [Pg.517]    [Pg.531]    [Pg.587]    [Pg.86]    [Pg.86]    [Pg.41]    [Pg.41]    [Pg.50]    [Pg.50]    [Pg.51]    [Pg.51]    [Pg.54]    [Pg.55]    [Pg.492]    [Pg.506]    [Pg.562]    [Pg.29]    [Pg.31]    [Pg.410]   
See also in sourсe #XX -- [ Pg.368 ]

See also in sourсe #XX -- [ Pg.368 ]

See also in sourсe #XX -- [ Pg.781 ]



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Dating methods potassium/argon

Dating techniques potassium-argon

Potassium-40 dating

Potassium-Argon

Potassium-argon dating applications

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