Guadalupe Mine

Site Name

Primary: Guadalupe Mine
Secondary: Guadalupe
Secondary: Unnamed Location (MAS 0060850111)

---

Commodity

Primary: Mercury

---

Location

State: California
County: Santa Clara
District: New Almaden

---

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

---

Holdings

Type: Fee Ownership

---

Workings

Type: Underground

---

Ownership

Owner Name: Rancho de Guadalupe Inc.
Percent: 5.00
Home Office: California
Info Year: 1982

Owner Name: James Rolfe, Iii
Years: 1957 -

Owner Name: Guadalupe Rubbish Disposal Inc.
Percent: 95.00
Home Office: California
Info Year: 1982

---

Production

Year: 1874
Time Period: 1846-1874
Material type: Bailey and Everhart, PP-360, p. 163. 20,000 flasks Hg.
Year: 1947
Time Period: To 1947
Material type: HG
Description: Cp_Grade: ^2-5% Hg
Year: 1947
Time Period: 1875-1947
Material type: 92,623 flasks Hg produced. (Bailey and Everhart, PP-360, p. 163)

---

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Year First Production: 1856
Discovery Year: 1846
Years of Production:
Organization:
Significant: N
Deposit Size: M

---

Physiography

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

---

Mineral Deposit Model

Not available

---

Orebody

Form: IRREGULAR

Name: deleted record 10213710 (MAS 0060850104)

Name: deleted record 10213710 (MAS 0060850104).

---

Structure

Type: L
Description: Serpentine - Sediment Contact , Shearing, Folding

---

Alterations

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

---

Rocks

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

Name: Serpentinite
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous

---

Analytical Data

Not available

---

Materials

Ore: Cinnabar
Ore: Mercury
Gangue: Quartz
Gangue: Pyrite
Gangue: Dolomite
Unknown: Sphalerite
Unknown: Galena
Unknown: Chalcopyrite
Unknown: Bornite
Unknown: Stibnite

---

Comments

Comment (Workings): From deleted record 0060850104. Unclear if this is real or proposed: Length 500 M Depth 122 M Additional Information: MAS Development Schedule #: 1 Mining Record # : 1 Status of Mining Method : PROPOSED Mining Method : SHRINKAGE METHODS Swell Factor : .6 Percent Waste Rock : 0 Percent Recovery : 100 Hardness of Rock : HARDROCK FISSURED WITH MODERATE WATER Rock Characteristics : ONE SYSTEM OF WEAKNESS PLANES Rock Support Chars. : SUPPORTING MAY BACK SLAB Mine Support Chars. : TIMBER Number of Shafts : 1 Length of Inclines (m) : 0 Slope of Inclines : 0 Avg. Length of Adits (m) : 0 1st Condition of Workings : OPEN Capacity : 64Capacity Units : MT ORE/DAY Unit Production Cost : 62.79 Units of Production : $/MT ORE Operating Days per Year : 71 Operating Shifts per Day : 1 Year of Information : 1982

Comment (Orebody): From deleted MAS record 0060850104. Seems to be a proposed or hypothetical model: [MATRIX 1 COLUMN 1 REPRESENTS TOTAL IDENTIFIED RESOURCES THESE RESOURCES ARE LOCATED NORTHWEST OF THE LAMB SHAFT AT A DEPTH OF 122 METERS (M).] MAS Matrix # : 1 MAS Column # : 1 Type of Orebody #1 : REPLACEMENT Shape of Orebody #1 : IRREGULAR Type of Orebody #2 : FISSURE VEIN Shape of Orebody #2 : TABULAR Primary mode of Origin : HYDROTHERMAL Primary Ore Control : LITHOLOGY Secondary Ore Control : FRACTURING Degree of Wallrock Alter. : MODERATE Type of Wallrock Alter. #1 : CARBONITIZATION Strike And Dip : N55W:45W Minimum Depth to Top : 0 Avg. Thick. Unconsol. Mat. : 3 Min. Thick. Unconsol. Mat. : 0 Date of Last Modification : 820524

Comment (Development): MAS 0060850104 = newMRDS 10213710: WATER AND ELECTRICAL POWER ARE AVAILABLE AT THE SITE, OR WITHIN 5 KILOMETERS (KM). THE PRESENT ACCESS ROAD IS ADEQUATE.

Comment (Location): LOCATED ON CENTRAL SHAFT

Comment (Reserve-Resource): ESTIMATED RESERVES OF 2000 TONS OF 5% ORE

Comment (Workings): Named workings (from Bailey and Everhart, pl. 14) include: Good Friday Shaft, Mc Gurk Tunnel, Old Hill mine pits, Canyon Tunnels, Caplan Tunnel, Moreno Tunnel, Upper and Lower water Tunnels, Hicks Tunnel, New Guadalupe Inclined Shaft, Office Mine Pit, Old Inclidne Shaft, Engine Shaft, Virginia Shaft, Maryland #1 shaft, Maryland No. 2 Shaft, and an air shaft on the south side of the hilltop. North of the hill are the Kelly Cuts, Upper Kelley Workings, and New Prospect tunnels. At the east end of the hilltop, but still west of Senator Mine, are the East Hilltop Workings.

Comment (Production): DMEA REPT INDICATES ABOUT 115,000 FL PRODUCED

Comment (Workings): UNDERGROUND WORKINGS INACCESSIBLE

Comment (Exploration): From MAS 0060850104 = newMRDS 10213710: 1942 DIREXPL WITH HELP OF USBM. FOUND MODERATE TONAGE OF LOW GRADE ORE. 1957 DIREXPL DMEA , FOUND SOME ORE

---

References

Reference (Deposit): IRELAN, WILLIAM JR., 1888, EIGHT ANNUAL REPORT OF THE STATE MINERALOGIST FOR THE YEAR ENDING OCTOBER 1, 1888: CALIFORNIA MINING BUR., P. 543-550, 946 P.

Reference (Deposit): HUTTL, J. B., 1944, GUADALUPE MERCURY MINE HAS NEW TREATMENT PLANT: ENG. AND MIN. JOUR., VOL. 145, NO. 6, P. 86-87.

Reference (Deposit): SAYERS, R. R., 1942, GUADALUPE MERCURY MINE: U. S. BUREAU OF MINES, WAR MINERALS REPT. 14.

Reference (Production): USBM DATA; BAILEY & EVERHART; HOLMES

Reference (Deposit): HUGUENIN, E. AND CASTELLO, W. O., 1921, SANTA CLARA COUNTY IN HAMILTON, FLETCHER, SEVENTEENTH REPORT OF THE STATE MINERALOGIST, 1920: CALIFORNIA MINING BUR., P. 180-227.

Reference (Deposit): BEDFORD, R.H. AND RICKER, S., 1950, INVESTIGATION OF THE GUADELUPE MERCURY MINE, SANTA CLARA COUNTY, CALIF.: USBM RI 4682, 9 p.

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

Reference (Deposit): RANSOME, A. L. AND KELLOGG, J. L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 35, no. 4, P. 353 - 486

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

Reference (Deposit): BAILEY, E. H., AND EVERHART, D. L., 1964, GEOLOGY AND QUICKSILVER DEPOSITS OF THE NEW ALMODEN DISTRICT, SANTA CLARA COUNTY, CALIFORNIA: USGS PROF. PAPER 360, 206 P.
Pages: p. 162-169.

Reference (Deposit): FRANKE, H.A., 1930, SANTA CLARA COUNTY, MINING IN CALIFORNIA: REPT. OF THE STATE MINERALOGIST, V. 26, P. 26-33

Reference (Deposit): FORSTNER, W., 1908, QUICKSILVER RESOURCES OF CALIFORNIA, CDMG BULL. 27, 270 P.

Reference (Deposit): DAVIS,F.F., AND JENNING, C.W., 1954, MINES AND MINERAL RESOURCES OF SANTA CLARA COUNTY, CALIF.: CJMG, V. 50, no. 2, P. 342-354

Reference (Deposit): BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.

Reference (Deposit): ANONYMOUS, 1944, GUADULUPE -: MINING WORLD, P. 34 AND 36.
Pages: p. 34, 36.

Reference (Deposit): SAYERS, R. R., 1943, GUADALUPE MINE, SANTA CLARA COUNTY, CALIFORNIA: U. S. BUREAU OF MINES, WAR MINERALS REPT. 111

---

California Gold

"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.