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40 AR/ 39 AR dating of synkinematic white mica; insights from fluid-rock reaction in low-grade shear zones (Mont Blanc Massif) and constraints on timing of deformation in the NW external Alps

Rolland, Yann; Rossi, M; Cox, Stephen; Corsini, M; Mancktelow, Neil; Pennacchioni, Giorgio; Fornari, M; Boullier, Anne-Marie

Description

This paper highlights the use of synkinematic white mica, biotite and phlogopite for the dating of deformation in ductile shear zones within crystalline rocks under low-grade metamorphic conditions. The Mont Blanc shear zones range from 1 mm to 50 m in width and have localized intense fluid flow, resulting in substantial differences in mineralogy and whole-rock geochemistry. On the basis of their synkinematic alteration assemblages and geographic distribution within the Mont Blanc Massif, three...[Show more]

CollectionsANU Research Publications
Date published: 2008
Type: Book chapter
URI: http://hdl.handle.net/1885/52394
DOI: 10.1144/SP299.18

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