| Locality type: | Mine |
| Classification |
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| Species: | Stilpnomelane |
| Formula: | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Stilpnomelane data |
| Locality Data: | Click here to view Mahnomen No. 2 mine, Ironton, Cuyuna North Range, Crow Wing County, Minnesota, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 247756 |
| Long-form Identifier: | 1:3:247756:5 |
| GUID (UUID V4): | 2669ec4d-de1a-45b1-b317-8e2c484b5953 |
| Nearest other occurrences of Stilpnomelane |
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| 1.0km (0.6 miles) | ⓘAlstead-North Hillcrest mine, Cuyuna North Range, Crow Wing County, Minnesota, USA |
| 1.2km (0.7 miles) | ⓘArko mine, Cuyuna North Range, Crow Wing County, Minnesota, USA |
| 2.2km (1.4 miles) | ⓘPortsmouth Mine, Cuyuna North Range, Crow Wing County, Minnesota, USA |
| 2.9km (1.8 miles) | ⓘMerritt No. 1 mine, Cuyuna North Range, Crow Wing County, Minnesota, USA |
| 3.4km (2.1 miles) | ⓘMerritt No. 2 Mine (Gorham Garbert Company), Cuyuna North Range, Crow Wing County, Minnesota, USA |
| 6.1km (3.8 miles) | ⓘSagamore Mine (Syracuse property), Riverton, Cuyuna North Range, Crow Wing County, Minnesota, USA |
| 18.8km (11.7 miles) | ⓘCuyuna North Range, Crow Wing County, Minnesota, USA |
| 82.5km (51.3 miles) | ⓘAlsted Mine (Shawmut Company), Cuyuna North Range, Carlton County, Minnesota, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Report (issue) | | Geology and Ore Deposits of the Cuyuna North Range Minnesota GEOLOGICAL SURVEY PROFESSIONAL PAPER...407 Geology and Ore Deposits of the Cuyuna North Range Minnesota By ROBERT GORDON SCHMIDT GEOLOGICAL...1924Geology and ore deposits of the Cuyuna North range, Minnesota. Washington, U.S. Govt. Print. Off....87-91. l.Geology Minnesota Cuyuna North range. 2.Ore-deposits Minnesota Cuyuna North Range. S.Iron ores Minnesota...Minnesota Cuyuna North range. I.Title: The Cuyuna North range, Minnesota. (Series) For sale by the Superintendent |  | | Report (issue) | | GEOLOGY AND GEOCHRONOLOGY OF MINNESOTA UNIVERSITY OF MINNESOTA MINNESOTA GEOLOGICAL SURVEY GEORGE M...The Precambrian Geology and Geochronology of Minnesota BY SAMUEL S. GOLDICH, ALFRED O. NIER, HALFDAN...KRUEGER MINNEAPOLIS • 1961 THE UNIVERSITY OF MINNESOTA PRESS PRINTED IN THE UNITED STATES OF AMERICA...and made the project possible. In addition the Minnesota Geological Survey supported the project, particularly...publication. The Graduate School of the University of Minnesota also made notable contributions of funds at critical |  | | Journal (article/letter/editorial) | | ................... Iron formations outside of North America ........................... Africa .......Fe were producedfrom taconiteand jaspilite in Minnesota ORIGIN OF PRECAMBRIAN IRON FORMATIONS 1027...following depositionare problems on which there is still no generalagreement. Thesequestionswere carefullyconsideredby...silicaby groundwaterduring the dry season. Alexandrov (2) concludedthat the iron formationshad their sourcein...rivers of North America of 300 •g/1 (parts per billion). The median for A1 is 238 •g/1 with a range of 12-2550 |
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