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Occurrences of Excess 40Ar in Hydrothermal Tourmaline: Interpretations from 40Ar-39 Ar Dating Results by Stepwise Heating
2007
Acta Geologica Sinica (English)
The occurrences of excess 40Ar 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 4oAr.39Ar stepwise heating technique. About 80% excess 40Ar was released in the last step when the tourmaline was fused, corresponding to a release of only -3 % 39Ar (K), which indicates that most excess 40Ar was held in the mineral lattice rather than in the channels
doi:10.1111/j.1755-6724.2007.tb00974.x
fatcat:l6e2cagihnd75bu5jkhdvknifm