Title: Occurrences of Excess <sup>40</sup>Ar in Hydrothermal Tourmaline: Interpretations from <sup>40</sup>Ar‐<sup>39</sup> Ar Dating Results by Stepwise Heating
Abstract: Abstract: The occurrences of excess 40 Ar within a hydrothermal tourmaline is discussed in term of the analysis data of syngenetic muscovite and tourmaline from the Lushui hydrothermal tin‐tungsten deposit in western Yunnan, China, using the 40 Ar‐ 39 Ar stepwise heating technique. About 80% excess 40 Ar was released in the last step when the tourmaline was fused, corresponding to a release of only ∼‐3% 39 Ar (K), which indicates that most excess 40 Ar was held in the mineral lattice rather than in the channels parallel to the Z‐axis. This suggests that the excess 40 Ar was incorporated during crystallization and not diffused into the tourmaline during the post‐crystallization history.
Publication Year: 2007
Publication Date: 2007-06-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 7
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