Geochronology and Thermochronology by the 40Ar/39Ar Method
Ian McDougall, Ian Mac Dougall, T. Mark Harrison, Professor of Geology Ian McDougall, Consultant in Emergency Medicine Mark Harrison, Professor of Geology Department of Earth and Space Sciences T Mark Harrison
Oxford University Press, 1999 - Science - 269 pages
Argon isotopic dating is one of the most important techniques for estimating the ages of rocks and can be used on very small samples. It has been used to assign reliable ages to the Earth and numerous meteorites. This second edition covers the standard principles and methods and incorporates many of new developments from the last decade. It covers the basis of the method, technical aspects, data presentation, diffusion theory, thermochronology, and many applications and case studies.
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Basis of the ArAr Dating Method
ArAr Data Presentation
Diffusion Theory and Measurements
A 1 Derivation of the diffusion
A 2 Closure temperature for volume
A 4 Calculation of ArſArage 7 3 Thermal histories of the continental
Applications and Case Histories 191
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activation energy age spectra alkali feldspar amphiboles analysis anorthoclase Apollo 11 apparent ages Ar’ſ”Ark argon diffusion argon isotopes argon loss argon released Arrhenius plot Arſ Arſ”Ar age spectra Arſ”Ar dating atmospheric argon atoms basalts biotite calculated closure temperature commonly composition crystals Dalrymple dating method decay degassing derived determined diffusion domain distribution Earth Planet equation errors excess argon fluence monitor flux Foland fraction gas release geochronology geological gradients grain HIFAR hornblende ion beam irradiation isochron K-feldspar K/Ar ages K/Ar dating K/Ca Koobi Fora laboratory Lanphere laser laser beam laser microprobe Lovera lunar magnetic mass spectrometer metamorphic micas minerals muscovite neutron obtained outgassing parameter phases phengite plagioclase plateau ples potassium produced radiogenic argon range ratio reactor relatively release argon sample sanidine spectrum step heating experiment technique tephra thermal history tion trapped argon Tuff Turner utilized vacuum volcanic whole rock yield
Page 251 - Pankhurst, RJ, Moorbath, S.. Rex, DC, and Turner, G., 1973, Mineral age patterns in ca. 3700 my old rocks from west Greenland: Earth and Planetary Sci.