Data Release of Geochemical, Geochronologic, and Isotopic Data for Proterozoic rocks from the Mountain Pass REE deposit and its host rocks, Arizona, California, and Nevada

This U.S. Geological Survey (USGS) data release includes whole-rock major, trace, and rare earth element geochemical data, whole-rock and mineral Nd-Pb-Sr isotopic data collected by thermal ionization mass spectrometry (TIMS), and uranium-lead isotopic data collected by Sensitive High Resolution Ion Microprobe-Reverse Geometry (SHRIMP-RG) methods that characterize the Mountain Pass Rare Earth Element deposit, associated Mesoproterozoic igneous rocks, and their Paleoproterozoic host rocks in Arizona, California, and Nevada. SHRIMP-RG data were collected between 2013 and 2018. Sample collection and whole-rock geochemistry were carried out between 1981 and 2015.