Idaho · Washington County
Past Producer

Almaden Mine

Washington County, Idaho, United States
GoldMercury
⌖ Show on mapUSGS source ↗
Description

Harry Brown

Commodities
PrimaryGold
TertiaryMercury
Commodity typeM
Deposit
Deposit typeEpithermal
Deposit sizeM
WorkingsSurface
Orebody formBLANKET
Ore controlNutmeg Anticline; Fissures
Materials
Ore mineralsCinnabar
GangueChalcedony, Opal, Pyrite
Geology
Host rockSandstone · Payette Formation;Payette Formation;Payette Formation;Idaho Formation;Idaho Formation
Associated rockBasalt · Columbia River Basalt
StructureBroad - Crested Parallel Anticlines. Deposit Located On The Crest Of A Long Anticline., Local Structural Depression, Partly The Result Of Faulting.
Tectonic settingSnake River Downwarp Or Syncline.
AlterationArgillic Alteration, Silicification , Opalitization
Economic & production
Development statusPast Producer
First production1939
Discovery year1936
Identification
Deposit ID10040402
MRDS IDM055162
Alternate namesIdaho-Almaden Mine, Osa-Anna, Nutmeg, Main Mine, Stinking Water Basin, Cove Mine
RegionNA
Data scoreA
Coordinates44.24015, -116.71488
References
Tietz,Paul, Gustin,M.M., 2009, NI 43-101 Technical Report, Almaden Project, Washington County, Idaho, December 8, 2009, 154 pagesBAILEY, E.H., USGS, PERSONAL FILES.ANDERSON, A. L., 1941 , GEOLOGY OF ALMADEN MINE, IDAHO BUR MINES GEOLOGY PAMPH 55 , 9 P.BAILEY, E. H., 1964 , MINERAL RESOURCES - MERCURY: IDAHO BUR MINES GEOLOGY SPECIAL REPORT NO. 1 , P. 119 - 123REQUA, L. K., 1940 , IDAHO - ALMADEN MINE: NORTHWEST MINING NEWS, V. 6 , NO. 23 , P. 7 - 9 ; V. 6 , NO. 24 , P. 7 - 9 .5) LICKES, M. R., 1957 , IDAHO - ALMADEN MERCURY MINE: USBM INF. CIRC. 7800 , 33 P.6) CAMPBELL, A., 1939 , FORTY-FIRST ANNUAL REPORT OF THE MINING INDUSTRY OF IDAHO FOR THE YEAR 1939 , P. 303 - 3077) SPOKANE CHRONICLE, FEB. 18 , 1972 ; DEC. 30 , 19708) ENG. MINING JOUR., MAR., 19671941 GEOLMAP ID. BUREAU OF MINES AND GEOL. PAMPHLET 551957 RECON U. S. BUREAU OF MINES INF. CIRC. 78001964 COMPILE ID. BUREAU OF MINES GEOL. SP. RPT. NO. 1BAILEY, E.H., USGS, PERSONAL FILES {{ ANDERSON, A. L., 1941 , IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 55 . {{ BAILEY, E. H., 1964 , IDAHO BUREAU OF MINES AND GEOLOGY SPEC. REPT. 1 {{ LICKES, M. R., 1957 , US BUR MINES INF. CIRC. 7800 {{ SPOKANE CHRONICLE, DEC. 30 , 1970 . ROSS, C. P., 1956 , USGS BULL. 1042-D