Title: The derivation of <sup>40</sup>Ar/<sup>39</sup>Ar age spectra of single grains of hornblende and biotite by laser step‐heating
Abstract: We present the first examples of 40 Ar/ 39 Ar age spectra for hornblende and biotite derived by the laser step‐heating of individual grains. It is straightforward to use a continuous laser to produce detailed (>20 steps), reproducible and precise age spectra in this way. An infra‐red microscope is used to monitor the sample temperature changes so that a judicious heating schedule can be chosen. Such a system can be readily automated. The biotite spectra shown exhibit large age differences (∼60 m.y.) between co‐existing flakes differing in mass by a factor of ∼70.
Publication Year: 1987
Publication Date: 1987-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 149
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