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Ar–Ar and K–Ar Dating

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Encyclopedia of Scientific Dating Methods
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Synonyms

(Argon–argon): Ar–Ar,40Ar–39Ar,40Ar/39Ar,39Ar–40Ar,39Ar/40Ar, argon-40/argon-39; (Potassium–argon): K–Ar,40K–40Ar,40Ar–40K

Definition

Potassium–argon dating. An absolute dating method based on the natural radioactive decay of40K to40Ar used to determine the ages of rocks and minerals on geological time scales.

Argon–argon dating. A variant of the K–Ar dating method fundamentally based on the natural radioactive decay of40K to40Ar, but which uses an artificially generated isotope of argon (39Ar) (produced through the neutron irradiation of naturally occurring39K) as a proxy for40K.

K–Ar Dating

The potassium–argon (K–Ar) geochronological method is one of the oldest absolute dating methods and is based upon the occurrence of a radioactive isotope of potassium (40K), which naturally decays to a stable daughter isotope of argon (radiogenic40Ar, also known as40Ar*). For this reason, the K–Ar method is one of the few radiometric dating techniques in which the parent (40K, a solid)...

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Bibliography

  • Antón, S. A., and Swisher, C. C., III, 2004. Early dispersal of homo from Africa. Annual Reviews in Anthropology, 33, 271–296.

    Article  Google Scholar 

  • Armstrong, P. A., 2005. Thermochronometers in sedimentary basins. Reviews in Mineralogy and Geochemistry, 58, 499–525.

    Article  Google Scholar 

  • Begemann, F., Ludwig, K. R., Lugmair, G. W., Min, K., Nyquist, L. E., Patchett, P. J., Renne, P. R., Shih, C.-Y., Villa, I. M., and Walker, R. J., 2001. Call for an improved set of decay constants for geochronological use. Geochimica et Cosmochimica Acta, 65, 111–121.

    Article  Google Scholar 

  • Berger, G. W., and York, D., 1981. Geothermometry from40Ar/39Ar dating experiments. Geochimica et Cosmochimica Acta, 45, 795–811.

    Article  Google Scholar 

  • Bissig, T., Clark, A. H., Lee, J. K. W., and Hodgson, C. J., 2002. Miocene landscape evolution in the Chilean flat-slab transect: uplift history and geomorphologic influences on epithermal processes in the El Indio-Pascua Au (–Ag, Cu) belt. Economic Geology, 97, 971–996.

    Article  Google Scholar 

  • Camacho, A., Lee, J. K. W., Hensen, B. J., and Braun, J., 2005. Short-lived orogenic cycles and the eclogitization of cold crust by spasmodic hot fluids. Nature, 435, 1191–1996.

    Article  Google Scholar 

  • Dalrymple, G. B., and Lanphere, M. A., 1969. Potassium-Argon dating: principles, techniques, and applications to geochronology. San Francisco: WH Freeman. 258 p.

    Google Scholar 

  • Dalrymple, G. B., Lanphere, M. A., and Pringle, M. S., 1988. Correlation diagrams in40Ar/39Ar dating: is there a correct choice? Geophysical Research Letters, 15, 589–591.

    Article  Google Scholar 

  • Deino, A., and Potts, R., 1992. Age-probability spectra from examination of single-crystal40Ar/39Ar dating results: examples from Olorgesailie, Southern Kenya rift. Quaternary International, 13(14), 47–53.

    Article  Google Scholar 

  • Deino, A., Renne, P. R., and Swisher, C. C., 1998.40Ar/39Ar dating in paleoanthropology and archeology. Evolutionary Anthropology, 6, 63–75.

    Article  Google Scholar 

  • Dickin, A. P., 2005. Radiogenic isotope geology, 2nd edn. Cambridge: Cambridge University Press, p. 492.

    Book  Google Scholar 

  • Dodson, M. H., 1973. Closure temperature in cooling geochronological and petrological systems. Contributions to Mineralogy and Petrology, 40, 259–274.

    Article  Google Scholar 

  • Dong, H., Hall, C. M., Peacor, D. R., and Halliday, A. N., 1995. Mechanisms of argon retention in clays revealed by laser40Ar-39Ar dating. Science, 267, 355–359.

    Article  Google Scholar 

  • Dong, H., Hall, C. M., Halliday, A. N., and Peacor, D. R., 1997. Laser40Ar-39Ar dating of microgram-size illite samples and implications for thin-section dating. Geochimica et Cosmochimica Acta, 61, 3803–3808.

    Article  Google Scholar 

  • Fitz Gerald, J. D., and Harrison, T. M., 1993. Argon diffusion domains in K-feldspar I: microstructures in MH-10. Contributions to Mineralogy and Petrology, 113, 367–380.

    Article  Google Scholar 

  • Fleck, R. J., Sutter, J. F., and Elliot, D. H., 1977. Interpretation of discordant40Ar/39Ar age spectra of Mesozoic tholeiites from Antarctica. Geochimica et Cosmochimica Acta, 41, 15–32.

    Article  Google Scholar 

  • Gaber, L. J., Foland, K. A., and Corbato, C. E., 1988. On the significance of argon release from biotite and amphibole during40Ar/39Ar vacuum heating. Geochimica et Cosmochimica Acta, 52, 2457–2465.

    Article  Google Scholar 

  • Gabunia, L., Vekua, A., Ferring, R., Justus, A., Lordkipanidze, D., Swisher, C. C., III, Tvalchrelidze, M., Antón, S. C., Bosinski, G., de Lumley, M.-A., Majsuradze, G., Mouskhelishvili, A., and Nioradze, M., 2000. Earliest Pleistocene hominid cranial remains from Dmanisi, Republic of Georgia, taxonomy, geologic setting and age. Science, 288, 1019–1025.

    Article  Google Scholar 

  • Goodman, C., and Evans, R. D., 1941. Age measurements by radioactivity. Geological Society of America Bulletin, 52, 491–544.

    Google Scholar 

  • Halliday, A. N., 1978.40Ar-39Ar stepheating studies of clay concentrates from Irish orebodies. Geochimica et Cosmochimica Acta, 42, 1851–1858.

    Article  Google Scholar 

  • Hanes, J. A., York, D., and Hall, C. M., 1985. An40Ar/39Ar geochronological and electron microprobe investigation of an Archean pyroxenite and its bearing on ancient atmospheric compositions. Canadian Journal of Earth Sciences, 22, 947–958.

    Article  Google Scholar 

  • Hodges, K. V., Ruhl, K. W., Wobus, C. W., and Pringle, M. S., 2005.40Ar/39Ar thermochronology of detrital minerals. Reviews in Mineralogy and Geochemistry, 58, 238–257.

    Article  Google Scholar 

  • Huneke, J. C., and Smith, S. P., 1974. The realities of recoil:39Ar recoil out of small grains and anomalous patterns in39Ar–40Ar dating. Geochimica et Cosmochimica Acta Supplement, 7(Proceedings of the 7th Lunar Science Conference), 1987–2008.

    Google Scholar 

  • Jourdan, F., and Renne, P. R., 2007. Age calibration of the Fish Canyon sanidine40Ar/39Ar dating standard using primary K–Ar standards. Geochimica et Cosmochimica Acta, 71, 387–402.

    Article  Google Scholar 

  • Kelley, S., 2002. Excess argon in K–Ar and Ar–Ar geochronology. Chemical Geology, 188, 1–22.

    Article  Google Scholar 

  • Kontak, D. J., Horne, R. J., Sandeman, H., Archibald, D., and Lee, J. K. W., 1998.40Ar/39Ar dating of ribbon-textured veins and adjacent wallrock from the Meguma lode gold deposits: implications for timing and duration of vein formation of slate-belt-hosted vein gold deposits. Canadian Journal of Earth Sciences, 35, 746–761.

    Article  Google Scholar 

  • Kramar, N., Cosca, M. A., and Hunziker, J. C., 2001. Heterogeneous40Ar* distributions in naturally deformed muscovite: in situ UV-laser ablation evidence for microstructurally controlled intragrain diffusion. Earth and Planetary Science Letters, 192, 377–388.

    Article  Google Scholar 

  • Kuiper, K. F., Deino, A., Hilgen, F. J., Krijgsman, W., Renne, P. R., and Wijbrans, J. R., 2008. Synchronizing the rock clocks of earth history. Science, 320, 500–504.

    Article  Google Scholar 

  • Lanphere, M. A., Champion, D., Melluso, L., Morra, V., Perrotta, A., Scarpati, C., Tedesco, D., and Calvert, A., 2007.40Ar/39Ar ages of the AD 79 eruption of Vesuvius, Italy. Bulletin of Volcanology, 69, 259–263.

    Article  Google Scholar 

  • Leakey, M. G., Feibel, C. S., McDougall, I., Ward, C., and Walker, A., 1995. New four-million-old hominid species from Kanapoi and Allia Bay, Kenya. Nature, 376, 565–571.

    Article  Google Scholar 

  • Leakey, M. G., Feibel, C. S., McDougall, I., Ward, C., and Walker, A., 1998. New specimens and confirmation of an early age for Australopithecus anamensis. Nature, 393, 62–66.

    Article  Google Scholar 

  • Lee, J. K. W., Onstott, T. C., Cashman, K. V., Cumbest, R. J., and Johnson, D., 1991. Incremental heating of hornblende in vacuo: implications for40Ar/39Ar geochronology and the interpretation of thermal histories. Geology, 19, 872–876.

    Article  Google Scholar 

  • Lo, C. H., and Onstott, T. C., 1989.39Ar recoil artifacts in chloritized biotite. Geochimica et Cosmochimica Acta, 53, 2697–2711.

    Article  Google Scholar 

  • Lo, C. H., Lee, J. K. W., and Onstott, T. C., 2000. Argon release mechanisms of biotite in vacuo and the role of short-circuit diffusion and recoil. Chemical Geology, 165, 135–166.

    Article  Google Scholar 

  • Lovera, O. M., Richter, F. M., and Harrison, T. M., 1989. The40Ar/39Ar geothermometry for slowly cooled samples having a distribution of diffusion domain sizes. Journal of Geophyscial Research, 94, 17917–17935.

    Article  Google Scholar 

  • Mark, D. F., Rice, C. M., Lee, M. R., Fallick, A. E., Boyce, A., Trewin, N. H., and Lee, J. K. W., 2010.40Ar/39Ar dating of hydrothermal activity, biota, and gold mineralization in the Rhynie hot-spring system, Aberdeenshire, Scotland. Geochimica et Cosmochimica Acta, 75, 555–569.

    Article  Google Scholar 

  • McDougall, I., and Harrison, T. M., 1999. Geochronology and thermochronology by the 40 Ar/ 39 Ar method, 2nd edn. New York: Oxford University Press, p. 269.

    Google Scholar 

  • McIntyre, G. A., Brooks, C., Compston, W., and Turek, A., 1966. The statistical assessment of Rb–Sr isochrons. Journal of Geophysical Research, 71, 5459–5468.

    Article  Google Scholar 

  • Merrihue, C., and Turner, G., 1966. Potassium-argon dating by activation with fast neutrons. Journal of Geophysical Research, 71, 2852–2857.

    Article  Google Scholar 

  • Min, K., Mundil, R., Renne, P. R., and Ludwig, K. R., 2000. A test for systematic errors in40Ar/39Ar geochronology through comparison with U/Pb analysis of a 1.1 Ga rhyolite. Geochimica et Cosmochimica Acta, 64, 73–98.

    Article  Google Scholar 

  • Nier, A. O., 1950. A redetermination of the relative abundances of the isotopes of carbon, nitrogen, oxygen, argon, and potassium. Physical Review, 77, 789–793.

    Article  Google Scholar 

  • Parsons, I., Brown, W. L., and Smith, J. V., 1999.40Ar/39Ar thermochronology using alkali feldspars: real thermal history or mathematical mirage of microtexture? Contributions to Mineralogy and Petrology, 136, 92–110.

    Article  Google Scholar 

  • Parsons, I., Fitz Gerald, J. D., Lee, J. K. W., Ivanic, T., and Golla-Schindler, U., 2010. Time-temperature evolution of microtextures and contained fluids in a plutonic alkali feldspar during heating. Contributions to Mineralogy and Petrology, 160, 155–180.

    Article  Google Scholar 

  • Phillips, D., and Onstott, T. C., 1988. Argon isotope zoning in mantle phlogopite. Geology, 16, 542–546.

    Article  Google Scholar 

  • Phillips, D., Kiviets, G. B., Barton, E. S., Smith, C. B., Viljoen, K. S., and Fourie L. F., 1999.40Ar/39Ar dating of kimberlites and related rocks: problems and solutions. In 7th International Kimberlite Conference v2, Red Roof Design, Cape Town, pp 677–688.

    Google Scholar 

  • Quang, C. X., Clark, A. H., Lee, J. K. W., and Guillén, B. J., 2003.40Ar–39Ar ages of hypogene and supergene mineralization in the Cerro Verde – Santa Rosa porphyry Cu–Mo cluster, Arequipa, Peru. Economic Geology, 98, 1683–1696.

    Article  Google Scholar 

  • Reichow, M. K., Pringle, M. S., Al'Mukhamedov, A. I., Allen, M. B., Andreichev, V. L., Buslov, M. M., Davies, C. E., Fedoseev, G. S., Fitton, J. G., Inger, S., Medvedev, A. Y. A., Mitchell, C., Puchkov, V. N., Safonova, I. Y. U., Scott, R. A., and Saunders, A. D., 2009. The timing and extent of the eruption of the Siberian Traps large igneous province: implications for the end-Permian environmental crisis. Earth and Planetary Science Letters, 277, 920.

    Article  Google Scholar 

  • Renne, P. R., Sharp, W. D., Deino, A. L., Orsi, G., and Civetta, L., 1997.40Ar/39Ar Dating into the historical realm: calibration against Pliny the younger. Science, 277, 1279–1280.

    Article  Google Scholar 

  • Renne, P. R., Karner, D. B., and Ludwig, K. R., 1998. Absolute ages aren’t exactly. Science, 282, 1840–1841.

    Article  Google Scholar 

  • Renne, P. R., Mundil, R., Balco, G., Min, K., and Ludwig, K. R., 2010. Joint determination of40K decay constants and40Ar*/40K for the Fish Canyon sanidine standard, and improved accuracy for40Ar/39Ar geochronology. Geochimica et Cosmochimica Acta, 74, 5349–5367.

    Article  Google Scholar 

  • Renne, P. R., Deino, A. L., Hilgen, F. J., Kuiper, K. F., Mark, D. F., Mitchell, W. S., Morgan, L. E., Mundil, R., and Smit, J., 2013. Time scales of critical events around the Cretaceous-Paleogene boundary. Science, 339(6120), 684–687.

    Article  Google Scholar 

  • Sherlock, R., Lee, J. K. W., and Cousens, B. L., 2004. Geological and geochronological constraints on the timing of mineralization at the Nanisivik zinc-lead Mississippi Valley-type deposit, northern Baffin Island, Nunavut, Canada. Economic Geology, 99, 279–293.

    Article  Google Scholar 

  • Sletten, V. W., and Onstott, T. C., 1998. The effect of the instability of muscovite during in vacuo heating on40Ar/39Ar step-heating spectra. Geochimica Cosmochimica Acta, 62, 123–141.

    Article  Google Scholar 

  • Smits, F., and Gentner, W., 1950. Argonbestimmungen an Kalium-Mineralien. I. Bestimmungen an tertiären Kalisalzen. Geochimica et Cosmochimica Acta, 1, 22–27.

    Article  Google Scholar 

  • Spell, T. L., and McDougall, I., 1992. Revisions to the age of the Brunhes-matayuma boundary and the Pleistocene geomagnetic polarity timescale. Geophysical Research Letters, 19, 1181–1184.

    Article  Google Scholar 

  • Steiger, R. H., and Jäger, E., 1977. Subcommission on geochronology: convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters, 36, 359–362.

    Article  Google Scholar 

  • Stoenner, R. W., Schaeffer, O. A., and Katcoff, S., 1965. Half-lives of argon-37, argon-39, and argon-42. Science, 148, 1325–1328.

    Article  Google Scholar 

  • Swisher, C. C., Curtis, G. H., Jacob, T., Getty, A. G., Suprijo, A., and Widiasmoro, 1994. Age of the earliest known hominids in Java, Indonesia. Science, 263, 1118–1121.

    Google Scholar 

  • Turner, G., and Cadogan, P. H., 1974. Possible effects of39Ar recoil in40Ar–39Ar dating. Geochimica et Cosmochimica Acta Supplement 5(Proceedings of the 5th Lunar Science Conference), 1601–1615.

    Google Scholar 

  • Turner, G., Miller, L. A., and Grasty, R. L., 1966. The thermal history of the Bruderheim meteorite. Earth and Planetary Science Letters, 1, 155–157.

    Article  Google Scholar 

  • Villa, I. M., 1997. Direct determination of the39Ar recoil distance. Geochimica et Cosmochimica Acta, 61, 689–691.

    Article  Google Scholar 

  • York, D., 1969. Least-squares fitting of a straight line with correlated errors. Earth and Planetary Science Letters, 5, 320–324.

    Article  Google Scholar 

  • York, D., 1984. Cooling histories from Ar/Ar age spectra: implications for Precambrian plate tectonics. Annual Review of Earth and Planetary Sciences, 12, 383–409.

    Article  Google Scholar 

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Lee, J.K.W. (2014). Ar–Ar and K–Ar Dating. In: Rink, W., Thompson, J. (eds) Encyclopedia of Scientific Dating Methods. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6326-5_40-1

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