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GRUAU , Gérard

Last name: GRUAU

First name: Gérard

August 1997 (v1)

Journal article

Metadata-only

Rb-Sr and 40Ar-39Ar laser probe dating of high-pressure phengites from the Sesia zone (Western Alps): underscoring of excess argon and new age constraints on the high-pressure metamorphism

Ruffet, Gilles Gruau, Gérard Ballèvre, Michel

The combined use of the Rb-Sr and 40Ar-39Ar laser probe methods allows confirmation of the existence of excess argon in phengites from eclogites from the Sesia zone (Western Alps) despite systematic 40Ar-39Ar plateau ages. 40Ar-39Ar phengite ages from two different areas show integrated age spreads between 65.4 ± 0.3 Ma and 109.5 ± 0.4 Ma. The...

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