Drill cores in the Duluth Complex, 50 to 70 km NNE of Duluth.
Ref.: Listerud, W.H. and Meineke, D.G. (1977) Mineral resources of a portion of the Duluth Complex and adjacent rocks in St. Louis and Lake counties, northeastern Minnesota. Minnesota Department of Natural Resources, Division of Minerals Mineral Exploration Section, Report 93.
Ripley, E.M. (1986) Applications of stable isotope studies to problems of magmatic sulfide ore genesis with special reference to the Duluth Complex, Minnesota. In: Geology and Metallogeny of Copper Deposits (G.H. Friedrich, A.D. Genkin, A.J. Naldrett, J.D. Ridge, R.H. Sillitoe & F.M. Vokes, editors). Springer-Verlag, Berlin, Germany (25-42).
Mineral List:8 entries listed. 4 valid minerals. 1 type locality (valid mineral).
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!