Mine detail: Eldorado District

Previously called 'Colorado District'

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Location

Lat / long:

35.7056, -114.79942

Resource(M)

Primary:	Gold, Silver, Zinc
Discovery year:	1857

Production

Operation type:	Unknown
Deposit type:	FISSURE VEINS
Production size:	Large
Development status:	Producer
First production started:	1861

Geology

Structure:	SHATTERED QTZ MONZONITE; FISSURES IN OLDER ROCK, N-S BELT OF PRE-CAMBRIAN SCHIST & GNEISSES
Alteration processes:	SILICIFICATION

References

MRDS	W002896
DEP	60001652
Reference	{Deposit:: RANSOME, F. L. 1907, PRELIM. ACCT. OF GOLDFIELD, BULLFROG, AND OTHER MINING DISTRICTS OF S. NEVADA: USGS BULL. 303, P. 64-79}{Deposit:: KOSCHMANN, AH AND BERGENDAHL, M. H., 1968, PRINCIPAL GOLD PRODUCING DISTRICTS OF THE U.S.: USGS PROF. PAPER 610, P. 174}{Deposit:: SPURR, JE, 1903, DESCRIPTIVE GEOL. OF NEV. S. OF THE 40TH PARALLEL: USGS BULL. 208 (LAS VEGAS RANGE)}{Deposit:: LINCOLN, FC, 1923, MIN. DIST. AND MIN. RESOURCES OF NEVADA: RENO, NEV. NEWSLETTER, P. 19.}{Deposit:: HILL, 1912, MINING DIST OF WEST US: USGS BULL. 507 P. 201}