RI-04 Interpretation of Lake Washington Magnetic Anomaly, Meeker County, Minnesota

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RI-04 Interpretation of Lake Washington Magnetic Anomaly, Meeker County, Minnesota

Published Date

1964

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Minnesota Geological Survey

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Report

Abstract

A magnetic anomaly centered at Lake Washington, in southeastern Meeker County, has been outlined by a ground magnetometer survey. The anomaly is arcuate in outline, about 8.5 miles long and a maximum of 5 miles wide, and has a maximum amplitude greater than 3,000 gammas. A gravity traverse was made across the anomaly to aid in interpretation. Combined magnetic and gravity data are interpreted to indicate that the source is a basin-shaped body having a substantially greater density than the adjacent rocks that lies at a shallow depth. The lithology of the source is not known because of a lack of subsurface data, but is inferred to be either Precambrian iron-formation or mafic igneous rock. The anomaly warrants further investigation.

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Previously Published Citation

Sims, P.K., Austin, G.S. and Ikola R.J., 1964, Interpretation of Lake Washington Magnetic Anomaly, Meeker County, Minnesota, Minnesota: Minnesota Geological Survey Report of Investigations 4, 13 p.

Suggested citation

Sims, P.K.; Austin, G.S.; Ikola, Rodney J.. (1964). RI-04 Interpretation of Lake Washington Magnetic Anomaly, Meeker County, Minnesota. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/60188.

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