ISSN:
1432-0819
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract 40Ar/39 Ar stepwise heating on one hydrothermal anhydrite and two partly hydrothermalized feldspars from a borehole in Vulcano volcano show that the initial trapped Ar does not have a constant isotopic composition. The constant 40Ar/36Ar ratio of the anhydrite, 306±3, is not a well-defined endmember for the two feldspars, which record a variety of fluid compositions. As the system is young (〈100 ka), radiogenic Ar is much less than excess Ar.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00278209
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