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A Triassic to Cretaceous Sundaland-Pacific subduction margin in West Sarawak, Borneo

Breitfeld, H Tim; Hall, Robert; Galin, Thomson; Forster, Marnie; Boudagher-Fadel, M.K.

Description

Metamorphic rocks in West Sarawak are poorly exposed and studied. They were previously assumed to be pre-Carboniferous basement but had never been dated. New 40Ar/39Ar ages from white mica in quartz-mica schists reveal metamorphism between c. 216 to 220 Ma. The metamorphic rocks are associated with Triassic acid and basic igneous rocks, which indicate widespread magmatism. New U-Pb dating of zircons from the Jagoi Granodiorite indicates Triassic magmatism at c. 208 Ma and c. 240 Ma. U-Pb dating...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
URI: http://hdl.handle.net/1885/231417
Source: Tectonophysics
DOI: 10.1016/j.tecto.2016.11.034

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