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The youngest basic oceanic magmatism in the Alps (Late Cretaceous; Chiavenna unit, Central Alps): geochronological constraints and geodynamic significance

Liati, Anthi; Gebauer, Dieter; Fanning, Christopher

Description

Cathodoluminescence-controlled radiometric dating (U-Pb SHRIMP) was carried out on zircon domains from metabasic rocks of the Chiavenna unit, a major mafic/ultramafic-bearing unit in the Central Alps. Co-magmatic zircon domains from amphibolites near Chiavenna and Prata areas yielded weighted mean 206Pb/238U ages at 93.0 ± 2.0 and 93.9 ± 1.8 Ma, respectively, interpreted as the age of crystallization of the magmatic protoliths. These ages fit well with the time of late spreading in the Valais...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
URI: http://hdl.handle.net/1885/88652
Source: Contributions to Mineralogy and Petrology (Electronic)
DOI: 10.1007/s00410-003-0485-7

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