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Tartèse, Romain; Ruffet, Gilles; Poujol, Marc; Boulvais, Philippe and Ireland, Trevor R.
(2011).
URL: http://dx.doi.org/10.1111/j.1365-3121.2011.01024.x
Abstract
Although water is ubiquitous in the continental crust, its effect on geochronometers through mineral reequilibration is rarely taken into account. Herein, we present 40Ar/39Ar analyses on muscovite and U-Pb isotopic data on zircon and monazite from a Variscan syn-tectonic granite from western France. Both the K-Ar in the muscovite and U-Pb in the monazite isotopic systems were hydrothermally reset, whereas the U-Pb radiogenic system in most of the zircons was unaffected and dates the granite emplacement age. Titanium chemical maps obtained on muscovites from various dated samples display a spectacular overprinting of their magmatic zoning resulting from increasing fluid-rock interaction. These results reiterate the need to combine geochronological data with petrological, mineralogical and geochemical studies to accurately interpret ages obtained in this type of geodynamical settings.
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About
- Item ORO ID
- 31686
- Item Type
- Journal Item
- ISSN
- 0954-4879
- Project Funding Details
-
Funded Project Name Project ID Funding Body Not Set Not Set CNRS-INSU (‘3F’ and ‘Action incitative’ programs) Not Set Not Set Rennes Me´tropole - Academic Unit or School
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Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2011 Blackwell Publishing Ltd
- Depositing User
- Romain Tartèse