Present in Michigan County: Marquette; Geological Formation: Republic Mine Pegmatite; Specific Mine Name: None; Commercial Mining History: None; Published Literature: ; Unpublished Literature: Johnson, Christopher M. and Van Daalen, Christopher M.,2015, Mineralogy and geochemistry of Late Archean and Paleoproterozoic granites and pegmatites in the Northern Penokean terrane of Marquette and Dickinson Counties, Michigan, University of New Orleans Masters Thesis, 384p.; Comments: Zircon grains analysed by Van Daalen (2015) contained an average of 1% Hafnium; USGS Critical Mineral Reference: Jones, J.V., III, Piatak, N.M., and Bedinger, G.M.,2017, Zirconium and hafnium, chap. V�of�Schulz, K.J., DeYoung, J.H., Jr., Seal, R.R., II, and Bradley, [...]