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Early Cretaceous subduction of continental crust at the Diego de Almagro archipelago, southern Chile

Herve, Francisco; Fanning, Christopher


In the Diego de Almagro archipelago of southern Chile, a quartz rich mica schist and a mylonitized granite contain Late Jurassic zircons of ca 166 and 170 Ma respectively. These rocks were metamorphosed during the Cretaceous in a subduction zone environment, which developed blueschist assemblages in metabasalts interleaved with the mica schist. The dated rocks were probably part of the acid large igneous province developed in southwestern Gondwanaland during the extensional phase which preceded...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
Source: Episodes


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