Mine detail: Union No. 4 Mine

Previously called ''

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Location

Lat / long:

38.53576, -117.06314

Resource(B)

Primary:	Gold
Tertiary:	Fluorine-Fluorite
Ore:	Fluorite, Gold

Production

Operation type:	Unknown
Deposit type:	Replacement
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	White Caps Limestone
Host type:	Limestone
Structure:	The Limestone Strikes N68w, Dip 48sw. Limestone Is Cut By Small Offset Faults. Gouge Along Fissures Indicates Post-Mineral Fault Movement.
Alteration processes:	Limestone Irregularly Altered To Coarsely Crystalline White Calcite.

References

MRDS	M231700
DEP	10044303
Reference	FERGUSON, H.G., 1924, GEOL. AND ORE DEPOSITS OF THE MANHATTAN DISTRICT: USGS BULL 723, P. 15
Reporter	Wong, George (Roberts, Ralph), La Pointe, D.D. (Tingley, J.V.)