Esperanza

The Esperanza is a mercury mine located in Sonoma county, California.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Esperanza  

State:  California

County:  Sonoma

Elevation:

Commodity: Mercury

Lat, Long: 38.80611, -122.84222

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.


Satelite image of the Esperanza

Esperanza MRDS details

Site Name

Primary: Esperanza
Secondary: Bright Hope


Commodity

Primary: Mercury


Location

State: California
County: Sonoma
District: West Mayacmas


Land Status

Not available


Holdings

Not available


Workings

Type: Underground


Ownership

Owner Name: J. G. Cortelyou


Production

Year: 1962
Time Period: To 1962
Material type: HG
Description: Cp_Grade: ^2-9 Lb/Ton


Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Discovery Year: 1917
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Type: L
Description: Serpentine - Sandstone Contact


Alterations

Alteration Type: L
Alteration Text: Silica Carbonate Alteration Of Serpentine


Rocks

Name: Serpentinite
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic


Analytical Data

Not available


Materials

Ore: Cinnabar
Ore: Mercury
Gangue: Quartz


Comments

Comment (Location): LOCATION UNCERTAIN

Comment (Workings): WORKINGS MOSTLY CAVED


References

Reference (Deposit): HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252

Reference (Deposit): BAILEY, E. H., USGS, PERSONAL FILES

Reference (Deposit): BAILEY, E. H., 1946, QUICKSILVER DEPOSITS OF THE WESTERN MAYACMAS DISTRICT, SONOMA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, P. 199 - 230

Reference (Deposit): BRADLEY, W. W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CALIF. STATE MIN. BUREAU BULL. 78, 389 P.

Reference (Deposit): 5) HONKE, M.T., JR. AND VER PLANCK, W.E., JR., 1950, MINES AND MINERAL RESOURCES OF SONOMA COUNTY, CALIF.: CJMG, V. 46, P. 98-105

Reference (Deposit): 6) RANSOME, A.L. AND KELLOGG, J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-486

Reference (Production): USBM DATA


California Gold

Where to Find Gold in California

"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.