Cuyuna North Range, Crow Wing Co., Minnesota, USA

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District consists of a semicircular area 5 miles in diameter north-northwest of Ironton, Minnesota. The ores are typical banded iron formation that have been metamorphosed and later concentrated into both brown and red hematite ore. Some of the mines also contain significant manganese mineralization. Ores have been mined both by underground methods as well as by open pit mining. The open pits are now filled by lakes. Best reference is USGS Professional Paper 407 "Geology and Ore Deposits of the Cuyuna North Range, Minnesota"

Mineral List

Mineral list contains entries from the region specified including sub-localities

Aegirine Albite 'Albite-Anorthite Series' 'Amphibole Group' Aragonite Arsenopyrite Baryte Calcite Chalcopyrite 'Chlorite Group' Cryptomelane

Diopside Enstatite Epidote Galena Goethite Groutite (TL) Grunerite Hematite var: Martite 'K Feldspar var: Adularia' Kutnohorite

Limonite Magnetite Manganite Microcline Minnesotaite (TL) Muscovite var: Sericite Nontronite 'Psilomelane' Pyrite Pyrolusite Pyrrhotite

Quartz var: Binghamite var: Chert Rhodochrosite Siderite var: Manganoan Siderite Stilpnomelane 'Tourmaline'

55 entries listed. 29 valid minerals. 2 type localities (valid minerals).

Localities in this Region

USA Minnesota Crow Wing Co. Cuyuna North Range Adams Mine (U S Steel Corp) Algoma mine (Iron Mountain Mine; Hoch Mine; Zeno Mine) Alstead-North Hillcrest mine Alsted Mine (Shawmut Company) Arko mine Armour No. 2 mine Aune Reserve Prospect (Hanna Mining Company) Barrows Mine (Hanna Iron Ore Divn; Hanna Mining Company Agt) Barrows Reserve H-1 Bonnie Belle mine (Liberty mine; Mattson Rectangle Mine) Brainerd-Cuyuna Mine (City of Brainerd) Carlson-Nelson mine Clearwater Lake Reserve X-43 Prospect (San Diego Bk & Tr Company) Colonization Reserve H-41 (Hanna Mining Company) Croft mine Crosby Crosby Reserve H-50 (Crosby Iron Company et al) Crow Wing Reserve O-11 (U S Steel Corp) Cuyuna North Range Cuyuna Reserve X-61 (Whiteside Cuyuna) Dunn Reserve H-3 Prospect (Hanna Iron Ore Division; Hanna Mining Company) Erich Reserve X-60 Prospect (Northern City Nat Bk Trustee et al) Federal Reserve X-37 Prospect (Federal Mining Company) Feigh mine Ferro mine (Duluth-Brainerd mine) Gloria mine (Donahue mine; McKensie mine; Lauretta Manganiferous Mines) US Bureau Mines core Gunderson Reserve O-34 Prospect (U S Steel Corp) Hanna Iron Ore Divn Prospect (Hanna Mining Company Agt; Barrows Reserve H-1) Hennen Mine (Hanna Mining Company) Hillcrest Extension mine Hillcrest Mine-North (Adams Brothers Company et al) Hillcrest Mine-South (R M Adams Company) Hopkins Mine (Hopkins-Sultana Mine; Pitt Pac Company et al) Hunter Reserve X-35 Prospect (Louise Hunter) Huntington mine Ironton Mahnomen No. 1 mine Mahnomen No. 2 mine Mahnomen No. 3 mine Mahnomen No. 4 mine Mahnomen pit Maroco Mine (Adbar mine) Sagamore Mangan No. 2 pit Ironton mine (Cuyuna-Duluth Mine) Joan No. 1 mine (Mangan Joan mine) Joan No. 4 mine Kennedy mine Kona Reserve X-21 Prospect (Cuyuna Village) Louisa mine (Cuyuna-Mille Lacs mine) Mallen mine Mangan No. 1 mine (Mangan-Stai mine) Mangan Stai Mine (R M Adams et al) Manuel mine Martin Mine (State of Minnesota Mine)

USA Minnesota Crow Wing Co. Cuyuna North Range Mattson Rectangle Mine (Armour No.1 Mine) Mattson Rectangle Mine (Mangan No. 2 Mine) Meacham mine Merritt No. 1 mine Merritt No. 2 Mine (Gorham Garbert Company) Milford mine (Ida Mae mine) Musser Mine (Hanna Mining Company) N.W.I. Reserve X-46 Prospect (Glacier Park Company) N.W.I. Reserve X-47 Prospect (Glacier Park Company & U S Steel Corp) N.W.I. Reserve X-48 Prospect (Burlington Northern Inc) N.W.I. Reserve X-49 Prospect (Burlington Northern Inc) N.W.I. Reserve X-50 Prospect (Glacier Park Company) N.W.I. Reserve X-51 Prospect (Glacier Park Company) N.W.I. Reserve X-52 Prospect (Glacier Park Company) N.W.I. Reserve X-53 Prospect (Burlington Northern Inc) North Carlson-Nelson Mine (G M Carlson et al) North Yawkey mine Northland mine Omaha Mine (Wilcox Mine; Omaha Iron Company; U S Steel Company et al) Pennington mine Polk Reserve X-58 Prospect (University of Minn Mine) Pontiac Mine (Clark Mine; Joan No. 3 Reserve; Hanna Mining Company Agt; Lauretta Manganiferous Mines) Portsmouth group Chisolm-Williams mine Evergreen mine Healy mine Meacham mine Osberg mine Portsmouth Extension Mine Portsmouth mine Thompson mine Wearne mine Preston mine Rabbit Lake mine Riverton Sagamore Mine (Syracuse property) Rowe mine Section 6 mine Sisters 40 Reserve H-67 Prospect (Benedictine Sisters Benevolent Assn; Hanna Mining Company) Snowshoe mine Snyder Mine (Snyder Mining Company; Trespass ore from Musser Mine) South Carlson-Nelson Mine (G M Carlson et al) South Hillcrest mine South Yawkey Mine Sultana-Hopkins mine Sultana Mine (Pitt-Pac Company et al) Syracuse Mine (J J Hennen et al) Syracuse Reserve St-4 (State of Minnesota) Tabert Reserve H-24 Prospect (Hanna Mining Company Agt) Trojan Mine (Trustee U/W Chester A Congdon et al) Virginia Extension Mine (Adams Brothers Company) Virginia mine Walker Reserve H-29 Prospect (Hanna Mining Company Agt) West Airport Mine (State of Minnesota et al) Whitmarsh Reserve H-66 Prospect (Hanna Mining Company Agt) Willcuts Reserve H-47 Prospect (Hanna Mining Company Agt)