February 2017 - Exploration for Metallic Mineral Resources: , Nickel, and Group Metals, Duluth Complex Map

The Exploration for Metallic Mineral Resources in Minnesota DULUTH COMPLEX Copper, Nickel, and Platinum Group Metals

Hosting World T. 62, R. 11 BWCAW White B2 D3 Gull Spruce Road Deposit Cu,Ni,PGM Class Copper, Nickel, Iron Gabbro Lake Twin Metals Minnesota NI 43-101 Lake and Platinum Group T. 62, R. 12 Lake Nickel Lake A B2 B2 T. 62, R. 7 T. 62, R. 10 T. 62, R. 9 Quadga Isabella S. Filson Creek Deposit Cu,Ni,PGM B2 E3 T. 62, R. 8 Metal Resources 1 D3 Lake Lake T. 62, R. 13 Encampment Minerals E3 E T3 D3 Omaday Bald Eagle Johnson B2 T3 Exploring since 1948 Purvis Lake-Ober One Pine E Lake Lake T. 62, R. 14 Lake Maturi Deposit Cu,Ni,PGM T3 E D3 Foundation SNA Lake B2 T3 T T3 T E D3 Twin Metals Minnesota NI 43-101 B2 T3 E E Bogberry T To w e r T E E3 Lake Bear B2 T D3 BWCAW T B2 B2 D3 Bog Head B2 T3 E3 Lake Lake T Bear Island T3 T B2 E3 E3 D3

T. 61, R. 14 State Boundary Waters Canoe Area Wilderness (BWCAW) Bear F Park Lake T3B2 T Head F F D3 E3 E D3 There are many deposits of copper, nickel, and PlatinumLake Group Birch E L E Harris D3 T. 61, R. 12 B2 Lake E Metal (PGM) resources in the bedrock along approximately 40 miles L Lake T. 61, R. 7 L T. 61, R. 11 D3 T. 61, R. 9 L T. 61, R. 8 of the edge of the Duluth Complex near Babbitt, Minnesota. This F E3 E3 D3 E3 L3 D3 E3 T. 61, R. 13 Birch Lake Deposit Cu,Ni,PGM F L3 map shows the locations of the deposits, state metallic mineral F E3 E Twin Metals Minnesota NI 43-101 L3 E F E3 E3 leases, and federal hardrock leases and prospecting permits. T3 D3 T. 61, R. 10 D3 E3 F E3 Birch F E E3 E3 B2 F F L3 E3 E3 There is another discovery of copper, nickel, and PGM at Tamarack F E3 D3 E3 Lake L3 (shown in the Tamarack Map below) , which is located along the F F Dunka Area Deposits Cu,Ni,PGM T3 E3 west flank of the Midcontinent Rift approximately 100 miles south- Twin Metals Minnesota T T3 T3

west of the Babbitt area deposits. The discovery is contained within F T F Babbitt T3 Slate an intrusion that is associated with the Midcontinent Rift. F T F Lake T. 60, R. 12 F T3 T Serpentine Deposit Cu,Ni,PGM F F F F Encampment Minerals F T3 T. 60, R. 7 E T. 60, R. 8 F F T. 60, R. 13 F F T3 Cliffs Natural Resources T. 60, R. 10 T. 60, R. 9 Northshore Taconite Mining Plant F TA Mesaba Deposit Cu,Ni,PGM F T. 60, R. 11 Teck American Inc. 1 T. 60, R. 14 T. 60, R. 15 TA

TA TA North McDougal D TA E E E Lake Dumbbell TA E D E E Lake NorthMet Deposit Cu,Ni,PGM E E South Isabella PolyMet Mining Corp. NI 43-101 Lake County E E E E E McDougal F E Lake PolyMet Mining Proposed Plant E PolyMet Mining T. 59, R. 11 E E 135 and Tailings Sites Proposed Mine Site E E Mesabi Section 17 Deposit Ti Sand Lake E E Nugget Peatland E E Idled Scientific T. 59, R. 9 T. 59, R. 8 T. 59, R. 15 Plant Wetlegs Deposit Cu,Ni,PGM T. 59, R. 7 Sabin and Natural Area T. 59, R. 10 T. 59, R. 12 Lake Longear Deposit Ti Sand

T. 59, R. 14 Lake St. Louis County Louis St. Wynne County Louis St. Longnose Deposit Ti Lake E E NI 43-101 P3 T. 59, R. 13

E

E Wyman Creek Deposit Cu,Ni,PGM,Ti Colby Encampment Minerals Greenwood E Lake Lake Aurora E Big E Sand Lake T. 58, R. 15 Lake E Exploration Leases and Permits Peatland E T. 58, R. 7 Hoyt Seven Beaver Scientific E Active state nonferrous metallic mineral leases T. 58, R. 12 and Natural Area See company label codes below for map labels. State leases have no number Lakes E E Lake appended to the label. E E T. 58, R. 13 T. 58, R. 9 T. 58, R. 11 T. 58, R. 10 T. 58, R. 8 Active federal hardrock mineral leases T. 58, R. 14 Beaver Bay Joint Venture (’B2’) is the only company with federal mineral leases. Whitewater E Lake Active federal hardrock prospecting permits E Sect. 22 Deposit Cu,Ni,PGM,Ti The map labels add a ‘3’ after a companies label code where they Encampment Minerals E E E 1 have a federal prospecting permit to help differentiate them from other leases. E E E E Twin Metals Minnesota and its E E E E Company labeled codes E Pine Ownership Interests E E A - Agate Lake Resources B2 - Beaver Bay Joint Venture Butterball Lake D - DMC (USA) LLC F - Franconia Minerals E - Encampment Minerals L - Lehmann Exploration E E Skibo Deposit Cu,Ni,PGM,Ti Lake P3 - Prime Meridian Resources T - Twin Metals Minnesota E Encampment Minerals St. Louis River TA - Teck American Inc. E E E E Northshore Mining Railroad The number ‘3’ is appended to the label code for Federal Prospecting Permits. P3 E Map Locations Tamarack Inset Map Only: E E E HTX - HTX Minerals K - Kennecott Exploration Co. E E E E

Ontario, Canada 7 R. T. 57, E E Terminated state nonferrous Canadian National Railway metallic mineral leases (1967-March 2017) E T. 57, R. 14 E E T. 57, R. 13 T. 57, R. 12 T. 57, R. 10 T. 57, R. 9 DuluthT. 57, R. 8 Private mineral leases are not shown. P3 E T. 57, R. 11 P3 E E Complex T. 57, R. 15 E P3 E E Map Mineral Deposits P3 P3 E E E Duluth Deposits of Copper, Nickel, PGM and/or P3 Water Hen Deposit Cu,Ni,PGM,Ti E Caddotte Tamarack E Prime Meridian Resources Deposit Name Minerals Lake Map Company *NI 43-101 P3 P3 E *National Instrument NI 43-101 is a national instrument for the Standards of Disclosure for Mineral Projects within Canada. Mineral deposits on this map MinneapolisLax with a completed NI 43-101 are: SpruceLoon Road, Maturi, Birch Lake, NorthMet, Bassett Lake Longnose, Titac South, and Tamarack LakeNorth. Lake and St. Paul

PolyMet’s NorthMet Project Area T. 56, R. 15 T. 56, R. 12 T. 56, R. 14 MINNESOTA Tettegouche Iron Ore Mining Features T. 56, R. 10 T. 56, R. 9 State T. 56, R. 13 T. 56, R. 11 T. 56, R. 8 7 R. T. 56, Active taconite Idled taconite pellet plant Park mining plant or pig iron nugget plant Tamarack Area Inset Map In closure taconite mining plant The Biwabik Iron Formation TAMARACK Taconite or Natural Iron Ore Pit K K K K K K Wolf Tailings Basin Lake DISCOVERY K K A Nickel, Copper, and K K K K Long Platinum Project General Bedrock Geology Terranes K K Lake Whiteface First drilled in 1984 by the MGS. Followed up in 1999 by Kennecott Exploration who discovered significant Duluth Complex Reservoir HTX K K K mineralization by 2008. In June 2014 Talon Metals K K Corporation entered into anBay North Shore Volcanic Group, Beaver Bay Lake T. 49, R. 23 exploration and option agreement Complex, or miscellaneous midcontinent rift Minnewawa 1 with Kennecott. intrusions K K K K HTX K K K Canadian NationalT. 55, Railway R. 11 T. 55, R. 10 Penokean Virginia Formation, Thomson K Carlton County T. 55, R. 13 T. 49, R. 22 K Formation, or Pokegama Quartzite 1 11 Kennecott exploration K K Cloquet River drilling compiled by DNR T. 55, R. 12 K 3 Archean Granite or Greenstones of the 1 1 - 10 drill holes K K T. 49, R. 21 Superior Province K T. 55, K K 11 - 20 drill holes R. 14 Tamarack North Deposit Ni,Cu,PGM 20 - 30 drill holes Round Kennecott Exploration & Talon Metals JV NI 43-101 1 Miles Lake K 8 K K Wright30 - 40 drill holes 0 1 2 3 4 Titac North Deposit Fe, Ti K K K E 25 40 - 60 drill holes Map Scale is 1:110,000 Comstock 1 K 14 T. 55,Lake R. 15 K K 60 K K E E K Cluster analysis applied by DNR to King 39 37 generalize the exploration drill hole Titac South Deposit Fe, Ti locations due to this small scale map NI 43-101 Lake K 5 K K K representation. E K E E K K 16 E K 2 Burlington NorthernK Santa Fe Railway T. 48, R. 21 E Highway 210 E 4 K E Lake County K K K K E K Tamarack E 2 K E K K K 1 K E E E T. 48, R. 23 K E 10 E E T. 54, R. 12 T. 54, R. 11 T. 54, R. 10 K K K K K T. 54, R. 15 T. 54, R. 13 K K Aitkin County

K Canadian National Railway National Canadian Canadian National Railway National Canadian Highway 210 K 1 E 4 K 2 E E K T. 48, R. 22 K K K 1 K K K K K K K T. 54, R. 14 K K K K 3 K K K K K K Disclaimer K

K K K K St. Louis County Louis St. St. Louis County Louis St. K The State of Minnesota makes no representations K K or warranties express or implied, with respect to K K the use of the information contained herein K K regardless of its format or the means of its trans- Sherriff K K K mission. There is no guarantee or representation to E Lieuna Lake K 5 E the user as to the accuracy, currency, suitability, Lake K completeness, usefulness, or reliability of this E information for any purpose. The user accepts the K E E T. 47, R. 23 information “as is." The State of Minnesota assumes T. 47, R. 22 K K K T. 47, R. 21 no responsibility for loss or damage incurred as a K result of any user’s reliance on this information. E K K K K All maps, reports, data, and other information contained herein are protected by copyright. 0 1 2 Miles Permission is granted to copy and use the materials T. 53, R. 10 Map Scale 1:100,000 herein for any lawful noncommercial purpose. Any T. 53, R. 14 user of this information agrees not to transmit or T. 53, R. 13 T. 53, R. 12 T. 53, R. 11 About this map and data provide access to all or any part of this information T. 53, R. 15 Map was updated by Kevin Hanson in February of 2016 at the Minnesota Department of Natural Resources, Division of Lands and to another party unless the user shall include with Minerals. the information a copy of this disclaimer. Iron Mining Plant Status (1/17), Iron Mining Features (1/15), Known Metallic Mineral Deposits (02/14), Exploration Drilling for Tw o Lake Superior Kennecott Exploration (12/16), and Active State Metallic Mineral Leases (02/28/17) from the DNR’s Division of Lands and Minerals. Federal Hardrock Leasing and Prospecting Permits from USDA Forest Service (1/15 - No changes to this data since January of 2015 Harbors through August of 2016). Bedrock Geology features were generalized from the MGS S-21, 2011 version (1:500,000). Roads and E Railroads from MnDOT; County Boundaries, State Parks, SNAs, BWCAW, Public Land Survey features, and Cities from the DNR; Lakes shown are greater than 200 acres and were taken from the DNR.