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

Sites Table
AIM Id Name Alternate Name District County
MI005475 MAMMOTH MINE COLOMA MISSOULA
MRDS AMLI MILS Latitude Longitude Datum
W014718 300630038 46.8425 -113.3825
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
13N 14W 33 BCAA 5190816 318353 12
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
5970 F BUTTE MISSOULA EAST UNION PEAK
Property Type Update Date Who Updated
LODE 2/16/1995
Commodities Table
Commodities Identified
COPPER
GOLD
SILVER
Agency Info Table
Information
Agency: BLM
Region District: BUTTE
Ranger District:
Forest Service Tract:
Watershed Code: 17010203
Forest or Resource Area: GARNET
Owner: P
Impact: U
Report: Mammoth (MI005475) The Mammoth workings consist of at least 2 caved shafts, several prospect pits, and a substantial dump area. Total surface disturbance is approximately 2 acres. Host rock is granodiorite. There is also minor white to pinkish marble (or limestone) on the dumps reflecting the proximity to the limestone-granodiorite contact. This was a vein deposit with white quartz forming the gangue; the only apparent sign of mineralization in 1994 was limonite staining. In the upper levels, the ore in both principle veins was oxidized and reportedly rich; the sulfide ore contained pyrite and tetrahedrite (Sahinen, 1957). An AIM sample assayed 534 ppm lead, 136 ppm zinc, 259 ppm copper, 44 ppm silver, 0.919 ounces gold, and 36 ppm arsenic. This mine was developed in the late 1800's with mining continuing well into the 1900's (Sahinen, 1957). Small yearly outputs were recorded up to 1950; the underground workings were caved by 1957 (Sahinen, 1957). Total production was approximately $200,000.00 worth of gold-silver ore. More efficient milling practices could have increased this value (Sahinen, 1957). All workings at this site are dry and pose no threats to surface water.
Assay Table
Information
Sample Id: WMMH-1
Material Type: WA
Sample Method: COMP
Comments:
Screening Criteria Table
Information
Mill Tailings: N
Adit Discharge: N
Metal Leaching: N
Water Erosion: N
Residence: N
Hazardous Materials: N
Open Adit: N
Visit: Y
Comments: MBMG GEOLOGIST JACK WATSON: 9-27-94

End of report. Retrieved 5/3/2024 12:26:38 PM.

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