U-Pb zircon geochronology and Nd isotopic signatures of the Pre-Mesozoic metamorphic basement of the eastern Peruvian Andes: Growth and Provenance of a late Neoproterozoic to Carboniferous Accretionary Orogen on the Northwest margin of Gondwana
This study integrates U-Pb zircon geochronology (from LAM-ICP-MS, SHRIMP, and TIMS) with Nd isotopic data from orthogneisses and metasedimentary rocks of the pre-Mesozoic basement of the eastern Peruvian Andes to provide new information on the tectonic evolution and Neoproterozoic-Paleozoic paleogeography of this segment of the proto-Andean margin. A high-grade orthogneiss unit yields U-Pb zircon protolith crystallization ages of ~613 Ma. It was metamorphosed and intruded by an Early Ordovician...[Show more]
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