Petro-structural map of the Dent Blanche tectonic system between Valpelline and Valtournenche valleys, Western Italian Alps
作者： Paola Manzotti
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摘要: Abstract Please click here to download the map associated with this article. The mountain ridge between Valpelline and Valtournenche valleys (Western Italian Alps) consists of a high-strain zone, several kilometres wide, in which basement cover Dent Blanche Mont Mary tectonic units (nappes Austroalpine domain) show complex interrelations. New detailed petro-structural maps across help update structural metamorphic evolution these units. Alpine imprint, under blueschist facies onditions, is evident only locally, notably shear zones. Such zones developed basement, post-Permian (Roisan metasedimentary Zone) where polyphase overprint strong. pre-Alpine commonly well-preserved many domains little strain. presented from 1:2,500 1:20,000 scales, cross sections, are primitive data source work. They synthesize ge...
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