Project Funded by the Minerals Coordinating Committee Through the Mineral Diversification Program
PREFACE The Minnesota Department of Natural Resources (MDNR), Minerals Division, maintains a Drill Core Library at its Hibbing, Minnesota office. This facility is the repository for 5,059 drill holes totaling 1,625,888 feet of drill core or cuttings from iron, base and precious metal exploration in Minnesota. Exploration holes were drilled on evidence of inferred mineralization. But are there other clues to mineralization in these cores?
By necessity, available evaluations have been limited and perhaps narrowly focused. For a 21 township area in southern Lake of the Woods County, all 43 available drill cores (and one additional adjacent core) were logged with 205 samples analyzed. In addition, other projects conducted overburden drilling in this same area, and aeromagnetic data from a portion of this area was used to produce a pseudo-geologic map.
Report 278: Report 278: 1991; Archean Drill Core Description and Assay in Lake of the Woods County, Minnesota; discussion and analysis of 45 drill cores from T157N R33W & 34W, T158N R33W & 34W, T159N R33W & 36W, T160N R31W & 36W
(189 pages, 8.5 x 11 inches, Large File Size 8.3 MB)
Authors: B.A. Frey and E. A. Venzke
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The following zip file contains data for 205 samples extracted from sixty-five drill holes described in the Minnesota Department of Natural Resources (MnDNR), Division of Land and Minerals Report, “Archean Drill Core Description and Assay in Lake of the Woods County, Minnesota Report 278,” published in 1988. Each folder in the zip file contains data from the report in a different format. The data is presented in its original Lotus data files, a Microsoft Access database, dBase IV files, and ArcGIS File Geodatabase.
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