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Field investigation of airborne radioactivity anomalies in Marquette County, Michigan

Trace Elements Memorandum 159

By:
DOI: 10.3133/tem159

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Abstract

The broad radioactivity anomalies recorded by the airborne detector in the vicinity of Republic, Marquette County, Michigan, coincide rather closely with parts of a granitic complex chiefly of Archean age. Ground examination of the rock in these areas of high radioactivity shows that the granitic rock typically yields two to four times the normal background activity. Fissures, shear zones, veins, and pegmatites were tested carefully. None exhibited activity higher than that of the adjacent granitic rock.


It is significant that the zones of more-than-average radio-activity are related to the larger elements of the geology - in fact, the information will be of considerable value in reconsideration of some of the regional problems.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Field investigation of airborne radioactivity anomalies in Marquette County, Michigan
Series title:
Trace Elements Memorandum
Series number:
159
DOI:
10.3133/tem159
Year Published:
1950
Language:
English
Publisher:
U.S. Geological Survey
Description:
Report: 5 p.; 3 Plates: 16.44 x 13.23 inches and smaller
Country:
United States
State:
Michigan
County:
Marquette County