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Soil anomalies associated with Cu-Ni mineralization in the South Kawishiwi area, northern Lake County, Minnesota

Open-File Report 75-158
By:
https://doi.org/10.3133/ofr75158

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Abstract

Geochemical sampling in the contact zone between the Giants Range Granite and the Duluth Gabbro Complex along the South Kawishiwi River indicates the presence of extensive soil anomalies associated with the known Cu-Ni-Co-Ag mineralization in the basal part of the Duluth Gabbro Complex. A close spatial relationship was found between the ore bodies and associated anomalies, despite the fact that the parent material of the sampled soils was glacial overburden that mantles the area to a depth of 0-50 feet. The <74 mesh fraction of B-horizon soils was found to be an effective sample type for geochemical exploration in this area. Trace metals are believed to be held primarily by the clay-size hydrated iron oxides and manganese oxide, which are somewhat enriched in the fine fraction of the B-horizon soils.

Suggested Citation

Alminas, H.V., 1975, Soil anomalies associated with Cu-Ni mineralization in the South Kawishiwi area, northern Lake County, Minnesota: U.S. Geological Survey Open-File Report 75-158, Report: iii, 20 p.; 6 Plates: 16.24 × 15.32 inches or smaller, https://doi.org/10.3133/ofr75158.

ISSN: 2331-1258 (online)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Soil anomalies associated with Cu-Ni mineralization in the South Kawishiwi area, northern Lake County, Minnesota
Series title Open-File Report
Series number 75-158
DOI 10.3133/ofr75158
Year Published 1975
Language English
Publisher U.S. Geological Survey
Description Report: iii, 20 p.; 6 Plates: 16.24 × 15.32 inches or smaller
Country United States
State Minnesota
County Lake County
Other Geospatial South Kawishiwi area
Additional publication details