Introduction extracted from page 1 of the report:
In rocks similar to those in the Lake Superior region of northeastern Minnesota, silver has been mined east of Thunder Bay, on Silver Islet; copper with silver has been mined extensively in northern Michigan; and copper-nickel mining has been proposed in Ontario, 15 miles north of Grand Portage. In Minnesota, extensive copper-nickel deposits have been discovered in the Ely-Hoyt Lakes area.
The Division of Minerals of the Minnesota Department of Natural Resources has the responsibility for the administration of approximately ten million acres of state controlled mineral lands in Minnesota. A large portion of these mineral lands are in the Lake Superior region of northeastern Minnesota. In order to properly administer the mineral lands, the Division of Minerals continually evaluates the mineral resource potential of these lands for various land use considerations.
In 1976, a program was initiated to evaluate the mineral resource potential of the Lake Superior region of northeastern Minnesota (Figure 1). This program includes: A determination of the types of mineral resources that could occur, based on the geology of the region; a survey of the literature, exploration data, and historical records to determine the nature and location of reported mineral occurrences; and field examination and laboratory testing of reported mineral occurrences.
In 1976, this program concentrated mainly· on native copper occurrences described in this progress report. Presently, an extensive survey of the literature, exploration data and historical records is underway for all mineral resources in the region. Field examination and laboratory testing of reported mineral occurrences, of all types, will continue during 1977-78. The entire area covered by this program is more than 3,000 square miles (Figure 1).
View or download report
Report 132-1: Mineral Evaluation of the Lake Superior Region of Northeastern Minnesota - A Progress Report on Field Surveys.
(9 pages, 8.5 x 11 inches, 317 KB)
Authors: W.H. Listerud
Please note: Best results in viewing this report will be obtained by saving the file to a location of your choice and opening with Adobe Reader or Acrobat. Some report information may not display as a result of opening with Acrobat directly from a web browser.
This report has been scanned in and applied with optical character recognition (OCR) which electronically translates the scanned image printed text into machine-encoded text. This allows users to then search the document by keywords in Adobe Reader or Acrobat software.
Download digital data
A georeferenced study area map of figure 4 in Report 132-1 (zip, 876 KB) This image was georectified for display in GIS software products.
Disclaimer and Copyright Protection: Maps, Reports, Data, and Other Information:
The State of Minnesota makes no representations or warranties express or implied, with respect to the use of the information contained herein regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, completeness, usefulness, or reliability of this information for any purpose. The user accepts the information “as is." The State of Minnesota assumes no responsibility for loss or damage incurred as a result of any user’s reliance on this information. All maps, reports, data, and other information contained herein are protected by copyright. Permission is granted to copy and use the materials herein for any lawful noncommercial purpose. Any user of this information agrees not to transmit or provide access to all or any part of this information to another party unless the user shall include with the information a copy of this disclaimer.