Browsing by Author "Severson, M.J."
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Item Bedrock Geology of the Babbitt Northeast Quadrangle, St. Louis and Lake Counties, Minnesota(University of Minnesota, 2002) Miller, James D., Jr.; Severson, M.J.; Foose, M.P.Item Geology, geochemistry, and PGE potential of mafic-ultramafic intrusions in Minnesota, excluding the Duluth Complex(Minnesota Geological Survey, 2006) Jirsa, M.A.; Miller, James D., Jr.; Severson, M.J.This open-file contains data from both the first and the second phase of a 3-year study to evaluate platinum group element potential in mafic-ultramafic intrusions throughout Minnesota, excluding the Duluth Complex. Specifically, it reports the results of geochemical analyses conducted on 20 intrusions selected from more than 150 that were inventoried during the first phase of the study released in 2003. Some overlap may occur between the geochemical data listings from Phase 1 and Phase 2.Item M-091 Bedrock geologic map of Allen quadrangle, St. Louis County, Minnesota(Minnesota Geological Survey, 1999) Severson, M.J.; Miller, James D., Jr.Item M-099 Bedrock geology of the Aitkin 30 x 60 minute quadrangle, east-central Minnesota(Minnesota Geological Survey, 1999) Boerboom, T.J.; Severson, M.J.; Southwick, D.L.Item M-100 Bedrock geology of the Mille Lacs 30 x 60 minute quadrangle, east-central Minnesota(Minnesota Geological Survey, 1999) Boerboom, T.J.; Severson, M.J.; Southwick, D.L.Item M-119 Geologic map of the Duluth Complex and related rocks, northeastern Minnesota(Minnesota Geological Survey, 2001) Miller, James D., Jr.; Green, J.C.; Severson, M.J.; Chandler, V.W.; Peterson, D.M.Item M-159 Bedrock geology of the Babbitt quadrangle, St. Louis and Lake Counties, Minnesota(Minnesota Geological Survey, 2005) Miller, James D., Jr.; Severson, M.J.Item M-160 Bedrock geology of the Babbitt Northeast quadrangle, St. Louis and Lake Counties, Minnesota(Minnesota Geological Survey, 2005) Miller, James D., Jr.; Severson, M.J.Item M-161 Bedrock geology of the Babbitt Southwest quadrangle, St. Louis County, Minnesota(Minnesota Geological Survey, 2005) Miller, James D., Jr.; Severson, M.J.Item M-165 Bedrock geology of the Deer Lake Complex, Itasca County, Minnesota(Minnesota Geological Survey, 2006) Severson, M.J.; Jirsa, M.A.Item OFR06-03, Final Report on the Geology, Geochemistry, Geophysical Attributes, and Platinum Group Element Potential of Mafic to Ultramafic Intrusions in Minnesota, Excluding the Duluth Complex(University of Minnesota, 2006) Jirsa, M.A.; Miller, James D., Jr.; Severson, M.J.; Chandler, V.W.This report describes the results of a 4-year study of the potential for platinum group elements (PGE) and associated metals in mafic to ultramafic intrusions in Minnesota, excluding the Duluth Complex. Phase 1 of the study, conducted during the 2002-2003 biennium, produced an extensive database of geologic, geochemical, and geochronologic information about the intrusions, which was released to open-file on the MGS website. Phase 2 of the study, conducted 2004-2006, refined the earlier data and focused effort on select intrusions identified as having some potential for PGE and being broadly representative of the diverse intrusion types and ages. Geochemical data from Phase 2 were released to open-file in 2006 (Jirsa and others, 2006a; on the MGS website: geo.umn.edu/mgs/released documents). This Final Report summarizes the work conducted and results obtained during both phases of the study.Item RI-58 Geology and mineral potential of the Duluth Complex and related rocks of northeastern Minnesota(Minnesota Geological Survey, 2002) Miller, James D., Jr.; Green, J.C.; Severson, M.J.; Chandler, V.W.; Hauck, S.A.; Peterson, D.M.; Wahl, T.E.