The data below represent everything available in the MBMG Abandoned and Inactive Mines (AIM) database.

Sites Table
AIM Id Name Alternate Name District County
JF006641 BIG FOUR BIG FOOT JEFFERSON
MRDS AMLI MILS Latitude Longitude Datum
300430409 46.1111 -112.1736
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
04N 05W 12 CDBD 5106813 409325 12
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
F BUTTE BUTTE NORTH RATIO MOUNTAIN
Property Type Update Date Who Updated
LODE 4/9/1995 JDL
Commodities Table
Commodities Identified
COPPER
GOLD
LEAD
SILVER
ZINC
Agency Info Table
Information
Agency: NF
Region District: R1
Ranger District: JEFFERSON
Forest Service Tract:
Watershed Code: 10020005
Forest or Resource Area: DEERLODGE
Owner: P
Impact: U
Report: Big Four Two dry open shafts with several thousand feet of workings which follow a N72E striking vein of quartz, pyrite, galena, sphalerite, and chalcopyrite. Much altered granite with 1-2% disseminated pyrite is present on the dump, which is adjacent to a wetland. The dump contains 3,000-5,000 tons of material of 0.026 oz/ton gold, 1.28 oz/ton silver, 0.028% copper, 2.64% lead, and 0.090% zinc. Roby and others (1960) stated that between 1902 and 1945, the State mine produced 1,577 tons of ore, 82 oz of gold, 7,236 oz of silver, 4,037 pounds of copper, 272,203 pounds of lead, and 123,699 pounds of zinc. Our own sample of vein material indicated a similar grade, containing 0.084 oz/ton gold, 1.92 oz/ton silver, 0.229% copper, 4.20% lead, 7.18% zinc, and 6.60% arsenic.
Assay Table
Information
Sample Id: BJBF-1
Material Type: WA
Sample Method: COMP
Comments: STRONGLY ALTERED GRANITE, QUARTZ, VERY FINE GRAINED 5-7% SULFIDE.
Screening Criteria Table
Information
Mill Tailings: N
Adit Discharge: N
Metal Leaching: N
Water Erosion: Y
Residence: N
Hazardous Materials: N
Open Adit: N
Visit: Y
Comments: BUCHHOLZ; 7/92

End of report. Retrieved 5/1/2024 6:56:58 PM.

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