| Deposit ID | 10101080 |
|---|---|
| MRDS ID | C007700 |
| Record type | Site |
| Current site name | Martinez |
| Alternate or previous names | Hillside Group |
| Related records | 10284672 |
| Geographic coordinates: | -120.81935, 38.63657 (WGS84) |
|---|---|
| Elevation | 320 |
| Relative position | ON MARTINEZ CREEK S OF UNION MINE ABOUT 4 1/2 MI SE OF EL DORADO |
Political divisions (FIPS codes)
El Dorado(county)
California(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Placerville(quadrangle 1:24,000 scale)
Placerville(quadrangle 1:100,000 scale)
Sacramento(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Cosumnes(hydrologic unit)
San Joaquin(hydrologic accounting unit)
San Joaquin(hydrologic subregion)
California(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | California | El Dorado |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 009N | 010E | 12,13 | California |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Lead | Tertiary |
| Materials | Type of material |
|---|---|
| Galena | Ore |
| Gold | Ore |
| Pyrite | Ore |
| Quartz | Gangue |
| Result | ORE DURING 1928 - 31 YIELDED $1.80 - $6.40 PER TON AU OTHER SMALL TONNAGES MILLED FROM 1923 - 26 VARIED FROM $4 - $80 PER TON AU |
|---|
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Amphibolite |
| Rock unit name | Mariposa Formation; |
| Rock description | Mariposa Formation; |
| (1) | -120.81935, 38.63657 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | Rocks In Area Trend Nw, Formations Are Much Disturbed By Faulting Some Faulted To Ne With Displacement From 16 To 30 Ft. |
| Depth to top | 0M |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Production years | 1926 - 31 , 1934 - 41 |
| Type of workings | Underground |
|---|---|
| Length | 822.96M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | C007700 |
CLARK, W. B., AND CARLSON, D. W., 1956 , MINES AND MINERAL RESOURCES OF EL DORADO CO., CALIF.: CALIF. JOUR. OF MINES AND GEOL., VOL 52 , NO. 4 , PG 419 , 517 AND PL 10 .
LOGAN, C. A., 1935 , MOTHER LODE GOLD BELT OF CALIF.: CALIF. DIV. MINES BULL. 108 , PG 30 - 31 , AND PL II.
LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 ,NO. 3 , PG 237 - 238 , 264 AND PL II.
CLARK ( 1956 )
| Subject category | Comment text |
|---|---|
| Deposit | NUMEROUS CLAIMS BUT LITERATURE VARIES WIDELY ON NAMES WHICH IT INCLUDES ; INFO.SRC : 1 PUB LIT |
| Deposit | VEINS ASSOCIATED WITH NARROW BANDS OF AMPHIBOLITE AND SERPENTINE |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-FEB-1979 | Mateik, R.; Albers, John P. | U.S. Geological Survey | PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD |
| Editor | 27-APR-1995 | Mosier, Dan | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.