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The Mejillonia suspect terrane (Northern Chile): Late Triassic fast burial and metamorphism of sediments in a magmatic arc environment extending into the Early Jurassic

Casquet, Cesar; Herve, Francisco; Pankhurst, Robert J; Baldo, Edgardo; Calderon, M.; Fanning, Christopher; Rapela, Carlos W; Dahlquist, Juan A.

Description

The Mejillonia terrane, named after the Mejillones Peninsula (northern Chile), has been traditionally considered an early Paleozoic block of metamorphic and igneous rocks displaced along the northern Andean margin in the Mesozoic. However, U-Pb SHRIMP zircon dating of metasedimentary and igneous rocks shows that the sedimentary protoliths were Triassic, and that metamorphism and magmatism took place in the Late Triassic (Norian). Field evidence combined with zircon dating (detrital and...[Show more]

CollectionsANU Research Publications
Date published: 2013
Type: Journal article
URI: http://hdl.handle.net/1885/53155
Source: Gondwana Research
DOI: 10.1016/j.gr.2013.05.016

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