| Deposit ID | 10042658 |
|---|---|
| MRDS ID | M060536 |
| Record type | Site |
| Current site name | Deep Gorge Chromite |
| Related records | 10225729 |
| Geographic coordinates: | -123.7831, 42.31482 (WGS84) |
|---|---|
| Elevation | 366 |
| Relative position | 3 MI EAST OF PEARSOLL PEAK |
Political divisions (FIPS codes)
Josephine(county)
Oregon(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Pearsoll Peak(quadrangle 1:24,000 scale)
Grants Pass(quadrangle 1:100,000 scale)
Medford(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Illinois(hydrologic unit)
Southern Oregon Coastal(hydrologic accounting unit)
Oregon-Washington Coastal(hydrologic subregion)
Pacific Northwest(hydrologic region)
Federal lands
Rogue River-Siskiyou National Forests(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Oregon | Josephine |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Willamette | 037S | 009W | 32 | NE4 OF NE4 | Oregon |
| Commodity | Importance |
|---|---|
| Chromium Critical | Primary |
| Platinum Critical | Tertiary |
| Palladium Critical | Tertiary |
| Rhodium Critical | Tertiary |
| Iridium Critical | Tertiary |
| Ruthenium Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Chromite | Ore |
| Calcite | Gangue |
| Talc | Gangue |
| Result | 1 PGE ANALYSIS: PD=15 PPB |
|---|---|
| Result | PT=41 PPB |
| Result | IR=50 PPB |
| Result | RU=100 PPB |
| Result | RH=21 PPB. CR:FE >2 |
| Model code | 15 |
|---|---|
| USGS model code | 8a |
| Deposit model name | Podiform chromite (minor) |
| Mark3 model number | none |
| Host or associated | Associated | ||||
|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Plutonic Rock > Ultramafic Intrusive Rock > Peridotite |
| Rock unit name | Pearsoll Peak Ophiolite |
| Rock description | Pearsoll Peak Ophiolite |
| (1) | -123.7831, 42.31482 |
|---|
| Type of structure | Local |
|---|---|
| Structure description | North-Trending Fault Of Considerable Displacement |
| General form | LENS, CURVED TABULAR, STRINGERS |
|---|---|
| Strike | N25-43E |
| Dip | 33-40SE |
| Width | 1.22M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1915 |
| District name | Illinois River Area |
|---|
| Ownership category | Federal |
|---|---|
| Area name | Siskiyou National Forest |
| Type | Owner |
|---|---|
| Owner | Grissom, J. N. And Mac |
| Last year | 1961 |
| Type | Owner |
|---|---|
| Owner | Inman, J. E. |
| Last year | 1961 |
| Year | 1945 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1941-1945 | ||||||||||||||
| Material | ORE | ||||||||||||||
| Accuracy | Estimate | ||||||||||||||
| Description | Cp_Grade: ^43-44% Cr2o3 | ||||||||||||||
| |||||||||||||||
| Year | 1958 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1941-1958 | ||||||||||||||
| Material | TOTAL | ||||||||||||||
| Accuracy | Estimate | ||||||||||||||
| Description | Cp_Grade: ^45.11% Cr2o3 (Weighted Average Grade) | ||||||||||||||
| |||||||||||||||
| Year | 1958 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1951-1958 | ||||||||||||||
| Material | ORE | ||||||||||||||
| Accuracy | Estimate | ||||||||||||||
| Description | Cp_Grade: ^43-50% Cr2o3 | ||||||||||||||
| |||||||||||||||
| Type of workings | Surface/Underground |
|---|---|
| Length | 250M |
| Overall length | 76.2M |
| Overall width | 121.92M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M060536 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0410330235 |
RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 52, P. 44-46.
THAYER, T.P., 1974, U.S. GEOLOGICAL SURVEY, UNPUB. DATA.
PAGE, N.J, JOHNSON, M.G., HAFFTY, JOSEPH, AND RAMP, LEN, 1975, OCCURRENCE OF PLATINUM GROUP METALS IN ULTRAMAFIC ROCKS OF THE MEDFORD-COOS BAY 2 DEGREE QUADRANGLE, SOUTHWESTERN OREGON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-694, SCALE 1:250,000.
RAMP, LEN, AND PETERSON, N.V., 1979, GEOLOGY AND MINERAL RESOURCES OF JOSEPHINE COUNTY, OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 100, TABLE 1.
OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES, 1952, OREGON METAL MINES HANDBOOK, SOUTHWESTERN OREGON--JOSEPHINE COUNTY (2D ED.): OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 14-C, V. 2, SEC. 1, P. 127-128.
CARLSON, C.A., AND OTHERS, 1985, ANALYSES FOR PLATINUM-GROUP ELEMENTS IN SAMPLES FROM PODIFORM CHROMITE DEPOSITS, CALIFORNIA AND OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-442, 14 P.
THAYER
| Subject category | Comment text |
|---|---|
| Deposit | ATTITUDES ARE FOR MAIN LENS. CHROMITE IS COARSE, FRACTURED, AND HIGHLY LUSTROUS. LOWER ZONE MAY BE EXTENSION OF MOCKINGBIRD MINE TO NORTH |
| Deposit | Discovery Year: WW I |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAY-1976 | Johnson, Maureen G. | U.S. Geological Survey | |
| Updater | 01-FEB-1981 | Ferns, Mark L. (Brooks, Howard C.) | Oregon Department of Geology and Mineral Industries | |
| Updater | 01-MAY-1989 | Peterson, Jocelyn A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.