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Late Jurassic bimodal magmatism in the northern sea-floor remnant of the Rocas Verdes basin, southern Patagonian Andes

Calderon, Mauricio; Fildani, A.; Herve, Francisco; Fanning, Christopher; Weislogel, A.; Cordani, Umberto

Description

Magmatic and detrital zircon ages from the Rocas Verdes basin, a tectonically juxtaposed remnant of sea floor in the Magallanes fold and thrust belt (southern Patagonia, South America), indicates that a rifting phase of the Rocas Verdes basin occurred between 152 and 142 Ma, and was accompanied by bimodal magmatism. A dacite dyke cross-cutting pillow-basalt successions and a plagiogranite dyke in mixed maficfelsic terranes of the basal Sarmiento Ophiolite Complex contain 150 Ma zircon crystals,...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
URI: http://hdl.handle.net/1885/32532
Source: Journal of the Geological Society
DOI: 10.1144/0016-76492006-102

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