| Deposit ID | 10067648 |
|---|---|
| MRDS ID | W000447 |
| Record type | Site |
| Current site name | Grindstone Mine |
| Alternate or previous names | Hill Mine |
| Geographic coordinates: | -77.76553, 38.19449 (WGS84) |
|---|---|
| Elevation | 110 |
| Relative position | 2.2 KM (1.4 MI) EAST OF PORTERS |
Political divisions (FIPS codes)
Spotsylvania(county)
Virginia(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Belmont(quadrangle 1:24,000 scale)
Fredericksburg(quadrangle 1:100,000 scale)
Washington(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Mattaponi(hydrologic unit)
Lower Chesapeake(hydrologic accounting unit)
Lower Chesapeake(hydrologic subregion)
Mid Atlantic(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Virginia | Spotsylvania |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Silver | Tertiary |
| Sulfur-Pyrite | Tertiary |
| Lead | Tertiary |
| Zinc Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Galena | Ore |
| Gold | Ore |
| Pyrite | Ore |
| Sphalerite | Ore |
| Magnetite | Gangue |
| Muscovite | Gangue |
| Quartz | Gangue |
| Model code | 273 |
|---|---|
| USGS model code | 36a |
| Deposit model name | Low-sulfide Au-quartz vein |
| Mark3 model number | 27 |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Metamorphic Rock > Schist | ||||
| Rock unit name | Chopawamsic Formation | ||||
| Rock description | Chopawamsic Formation | ||||
| |||||
| (1) | -77.76553, 38.19449 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Ne-Sw Trend, Columbia Syncline |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Significant | No |
| District name | Gold-Pyrite Belt |
|---|
| Ownership category | Private |
|---|
| Type | Operator |
|---|---|
| Owner | New Jersey Zinc Co. |
| Type | Owner |
|---|---|
| Owner | Chesapeake Corp Of Va |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W000447 |
LUTTRELL, G.W., 1966, VA. MIN. RES. REPORT 7, P. 59.
MCCASKEY, H D, 1911, GOLD, SILVER, COPPER, LEAD, AND ZINC IN THE EASTERN STATES IN 1910 (MINE PRODUCTION), IN MINERAL RESOURCES OF THE UNITED STATES, CALENDAR YEAR 1910, PT. 1, METALS: US GEOLOGICAL SURVEY, P 675-691.
MCCASKEY, H D, 1912, GOLD, SILVER, COPPER, LEAD, AND ZINC IN THE EASTERN STATES IN 1911 (MINE PRODUCTION), IN MINERAL RESOURCES OF THE UNITED STATES, CALENDAR YEAR 1911, PT 1, METALS: US GEOLOGICAL SURVEY, P 873-888.
SWEET, P C, 1980, GOLD IN VIRGINIA: VIRGINIA DIVISION OF MINERAL RESOURCES, PUBLICATION 19, 77 P
1905 DIREXPL POSSIBLE BEGINNING OF DEVELOPMENT.
1955 OTHER NEW JERSEY ZINC CO: LEASED PROPERTY.
1974 RECON VA DIV MIN RES: INSPECTED SITE.
| Subject category | Comment text |
|---|---|
| Deposit | THOUGH TWO SEPARATE WORKINGS, THE LITERATURE DOES NOT DISTINGUISH WELL BETWEEN THE GRINDSTONE AND NEW GRINDSTONE MINES. WATSON (T L, 1907, MINERAL RESOURCES OF VIRGINIA: LYNCHBURG, VA, J P BELL CO, 618 P) REFERS TO EXISTENCE OF MINE. THE UPDATING REPORTER CONSIDERS THE GRINDSTONE TO BE AN OLDER WORKING, POSSIBLY PRE-1900, WHILE THE NEW GRINDSTONE INCLUDES THOSE WORKINGS REFERRED TO BY MCCASKEY (1911, 1912). ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAY-1972 | Wright, Nancy A. | U.S. Geological Survey | |
| Updater | 01-JUL-1979 | Meintzer, Robert E. (Le Van, D.C.) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.