TY - RPRT TI - Petrogenesis and rare earth element mineralization of the Elk Creek carbonatite, Nebraska, USA AU - Philip Verplanck AU - G. Lang Farmer AU - Richard M. Kettler AU - Heather A. Lowers AU - Craig A. Johnson AU - Alan E. Koenig AU - Michael J. Blessington PY - 2022 DO - 10.1016/j.oregeorev.2022.104953 UR - https://pubs.usgs.gov/publication/70232132 ID - 70232132 ER -