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Geochronology and geochemistry of Paleoproterozoic metamorphic rocks in the Midcontinent

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 06:11 AM | Dataset Last Updated: January 07, 2026 at 12:00 AM
We present isotopic and geochemical data for several Archean and Paleoproterozoic metamorphic rocks in the Penokean orogen, USA. These data include new U-Pb and trace element analyses of apatite, titanite, and monazite; bulk rock major and trace element compositions; and whole rock and garnet Lu-Hf and Sm-Nd isotope compositions.

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