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Reconnaissance geochemical map of the Mount Henry Roadless Area, Lincoln County, Montana

Miscellaneous Field Studies Map 1534-B

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Abstract

A geochemical survey was conducted in the Mount Henry Roadless Area, Kootenai National Forest, Lincoln County, Mont. by the U.S. Geological Survey during the summer of 1981.

The sampling and analytical programs were designed to locate mineralized zones in outcrops or in rocks buried at shallow depth. The geochemical results should be evaluated in context with geological and geophysical results. Possible types of mineralization, as judged from occurrences in nearby areas where the rocks are similar to those in the study area, include strata-bound copper-silver occurrences in rocks of the Ravalli Group, specifically the Burke and Revett Formations; the less probable lead-zinc massive sulfide deposits of the Sullivan-type in the pre-Ravalli (middle Prichard Formation); potential metal-enriched, sulfide vein systems; and gold-bearing veins or placer occurrences.

All samples collected for this study are plotted on the map. Element symbols shown at sample sites indicate an anomalous concentration for that element at the site. Tables 1–3 list the values of selected elements determined to be critical for a mineral evaluation of this particular geologic setting. All analytical results, including those selected for this report, are given in a U.S. Geological Survey Open-File report (Siems and others, 1983).

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Reconnaissance geochemical map of the Mount Henry Roadless Area, Lincoln County, Montana
Series title:
Miscellaneous Field Studies Map
Series number:
1534
Chapter:
B
Year Published:
1984
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Description:
41.47 x 29.26 inches
Country:
United States
State:
Montana
County:
Lincoln County
Other Geospatial:
Mount Henry Roadless Area
Scale:
50000
Online Only (Y/N):
N
Additional Online Files (Y/N):
N