DNR Reports 295: Reconnaissance Mineral Potential Evaluation, Central Minnesota

DNR Report 295 Volumes 1 & 2: Reconnaissance Mineral Potential Evaluation, Central Minnesota, Open File Report, 1993.
DNR Report 295-2: Central Minnesota: Compilation of Metallic Mineral Potential Databases for Analysis Using Geographic Information Systems

Project Funded in Part by the Minerals Coordinating Committee Through the Mineral Diversification Program

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Abstract extracted from Report 295, Volume 1:

REPORT 295 VOLUME 1 ABSTRACT (First three paragraphs only)   The Minnesota Department of Natural Resources, Minerals Division, has completed a program using contemporary methods to begin to evaluate the mineral potential of a large part of Central Minnesota, (see index map in pocket). This project is oriented toward identifying nonferrous metallic mineralization, associated alteration or lithologic units and structures permissive of such mineralization. The purposes are: 1. To serve land use planning within the D.N.R.; 2. To encourage private exploration through better data access, and; 3. To serve government agency planning of future programs.

The goal of creating an improved regional mineral potential evaluation was approached by seeking: 1. Mineral occurrences, or lithologic units and structures permissive of mineral deposits. 2. Defining basic bedrock lithologic locations from existing drill core. 3. Creating 1:62,500 scale inferred geologic maps, which display interpreted mineral potential, using available geophysical and geologic data supplemented by some field work. 3. Re-evaluating existing geochemical surveys using contemporaneous statistical analytical methods. Both the inferred geologic mapping and re-evaluation of geochemical data required assemblage of available data in digital formats, which enhanced the geologic database in this region of few outcrops. This improved the availability of data for use by all our clients in the public and private sectors. The process of converting the geological data for this area into a digital format is continuing (see Index to Minerals Resource Information in Central Minnesota, in progress).

Data used in this project are from several sources which are divided into two groups: The major part of the data base which existed prior to this project, and; new data acquired as a part of this project. Existing data sources were: 1. Exploration data and drilling done by private industry or government agencies which is available to the public at the D.N.R. Minerals Library in Hibbing; 2. Geologic maps, airborne magnetic surveys, and gravity surveys, funded by the Legislative Commission on Minnesota Resources, and done by the Minnesota Geological Survey; 3. Geochemical surveys done by the United States Department of Energy and the Minnesota Department of Natural Resources; 4. Data from Mineral Division files.

1. View or download report:

Report 295, Volume 1: Reconnaissance Mineral Potential Evaluation, Central Minnesota, Open File Report. This is a PDF file. You will need Adobe Acrobat Reader to download it.
(384 pages, 8.5 x 11 inches, Large File Size - 13.90 MB)
Authors: B.F. Frey and T.L. Lawler

Report 295, Volume 2: Reconnaissance Mineral Potential Evaluation, Central Minnesota, Open File Report. This is a PDF file. You will need Adobe Acrobat Reader to download it.
(265 pages, 8.5 x 11 inches, Large File Size - 9.56 MB)
Authors: B.F. Frey and T.L. Lawler

Report 295-2: Central Minnesota: Compilation of Metallic Mineral Potential Databases for Analysis Using Geographic Information Systems. This is a PDF file. You will need Adobe Acrobat Reader to download it.
(73 pages, 8.5 x 11 inches, 2.61 MB)
Authors: B.F. Frey and T.L. Lawler

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2. View or download plates:

Plate 1 for 295-2: Inferred Bedrock Geologic - Mineral Potential Maps: Modified from Spector (1992, 1993, 1994, and 1995) This is a PDF file. You will need Adobe Acrobat Reader to download it.
(11 x 17 inches, full size, 977 kb)
Author: MN DNR, Division of Lands and Minerals

3. Digital data available:

Raw digital data of report 295 is available by request.

For more information:

Dennis Martin
500 Lafayette Road
St. Paul, Minnesota 55155-4045
tel. (651) 259-5405
fax (651) 296-5939
dennis.martin@state.mn.us

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