Geochemical evolution of Cenozoic-Cretaceous magmatism and its relation to tectonic setting, southwestern Idaho, U.S.A

Physics

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Geochemistry, Idaho, Magma, Planetary Evolution, Tectonics, Earth Crust, Lead Isotopes, Neodymium Isotopes, Strontium Isotopes, Subduction (Geology), Trace Elements

Scientific paper

The relationships between Cretaceous to Neogene magmatism and the tectonic setting of southwestern and central Idaho are evaluated. An overview of the tectonics and geology of the northwestern U.S. is presented. Major element, trace element, and Sr, Pb, and Nd isotopic data for the region are used to place constraints on magma source characteristics, the manner in which the magmatic sources evolved through time, and the nature of interactions among mantle and crustal domains in response to changing tectonic environment.

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