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Dating fault-generated pseudotachylytes: comparison of Ar-40/Ar-39 stepwise-heating, laser ablation and Rb-Sr microsampling analyses

Mueller, Wolfgang; Kelley, Shari K; Villa, Igor M

Description

Three different geochronological techniques (stepwise-heating, laser-ablation 40Ar/39Ar, Rb-Sr microsampling) have been evaluated for dating fault-generated pseudotachylytes sampled along the Periadriatic Fault System (PAF) of the Alps. Because pseudotachylytes are whole-rock systems composed of melt, clast and alteration phases, chemical control from both Ar isotopes (Cl/K, Ca/K ratios) and EMPA analyses is crucial for their discrimination. When applied to stepwise-heating 40Ar/39Ar analyses,...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
URI: http://hdl.handle.net/1885/73471
Source: Contributions to Mineralogy and Petrology

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