| Deposit ID | 10047849 |
|---|---|
| MRDS ID | M700177 |
| Record type | Site |
| Current site name | Last Chance Mine |
| Related records | 10155988 |
| Geographic coordinates: | -122.21451, 45.71009 (WGS84) |
|---|---|
| Elevation | 488 |
| Relative position | 16 MI FROM WASHOUGAL BY ROAD; ABOUT 5 MI NORTH-NORTHWEST OF BOBS MOUNTAIN |
Political divisions (FIPS codes)
Skamania(county)
Washington(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Bobs Mountain(quadrangle 1:24,000 scale)
Vancouver(quadrangle 1:100,000 scale)
Vancouver(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Lower Columbia-Sandy(hydrologic unit)
Lower Columbia(hydrologic accounting unit)
Lower Columbia(hydrologic subregion)
Pacific Northwest(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Washington | Skamania |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Willamette | 003N | 005E | 29 | CENTER OF S2 OF SE4 | Washington |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Vanadium Critical | Primary |
| Gold | Primary |
| Silver | Primary |
| Lead | Tertiary |
| Zinc Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Bornite | Ore |
| Chalcocite | Ore |
| Chrysocolla | Ore |
| Descloizite | Ore |
| Malachite | Ore |
| Pyrite | Gangue |
| Quartz | Gangue |
| Result | CU=TR-6%, OVER VEIN WIDTH OF 1-5 FT. 8-10% CU REPORTED OVER VEIN WIDTH UP TO 1 FT IN EAST ADIT. VEIN AS A WHOLE ESTIMATED TO CARRY 1.5% CU OVER WIDTH OF 1-3 FT. USBM SAMPLES SHOWED 2.75% CU, 0.71 OZ/TON AG IN EAST ADIT (936 FT) OVER AVERAGE VEIN WIDTH OF 4 FT. COMPOSITE SAMPLES SHOW 1-2% V2O5, AND 0.25-0.50% V2O5. OTHER ASSAYS AVERAGE 0.13 OZ/TON AU, 7.2 OZ/TON AG, 7.5% CU. SPECTOGRAPHIC ANALYSIS OF DESCLOIZITE AT FACE OF ADIT SHOWED 1-10% V, 1-10% PB, 8% CU, 8% ZN. SEE MOEN (1977) FOR MORE ASSAYS |
|---|
| Model code | 85 |
|---|---|
| USGS model code | 22c |
| Deposit model name | Polymetallic veins |
| Mark3 model number | 46 |
| Host or associated | Host | ||||||
|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite | ||||||
| Rock unit name | Silver Star Pluton | ||||||
| Rock description | Silver Star Pluton | ||||||
| |||||||
| (1) | -122.21451, 45.71009 |
|---|
| General form | VEIN |
|---|---|
| Strike | S45-54E |
| Dip | 60-90SW AND NE |
| Thickness | 3.05M |
| Length | 3218.6M |
| Width | 243.84M |
| Depth to top | 0M |
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1900 |
| District name | Washougal District |
|---|
| Ownership category | Private |
|---|
| Type | Operator |
|---|---|
| Owner | Washougal Consolidated Copper Mining Co. |
| Type | Owner |
|---|---|
| Owner | Leon Montchalin, Washougal, Wash. |
| First year | 1956 |
| Type of workings | Underground |
|---|---|
| Length | 366.67M |
| Overall depth | 164.59M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M700177 |
QUARTZ DIORITE
HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERAL - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 77.
MOEN, W.S., 1977, ST. HELENS AND WASHOUGAL MINING DISTRICTS OF THE SOUTHERN CASCADES OF WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES INFORMATION CIRCULAR 60, P. 43, 53-55.
PHILLIPS, W.M., 1987, GEOLOGIC MAP OF THE VANCOUVER QUADRANGLE, WASHINGTON AND OREGON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 87-10, SCALE 1:100,000.
| Subject category | Comment text |
|---|---|
| Deposit | QUARTZ-FILLED FISSURE VEIN IN QUARTZ DIORITE PHASE OF SILVER STAR PLUTON. VEIN IS 1-10 FT THICK, MUCH OF WHICH CONSISTS OF 1-4 FT OF MASSIVE QUARTZ. THICKER PARTS OF VEIN CONSIST OF SEVERAL NARROW QUARTZ VEINS ALTERNATING WITH HIGHLY BRECCIATED AND SILICIFIED QUARTZ DIORITE. BORNITE, CHALCOCITE, AND CHALOCPYRITE OCCUR AS DISSEMINATIONS AND BLEBS IN THE VEIN QUARTZ; CHRYSOCOLLA, MALACHITE, AND AZURITE COAT FRACTURE SURFACES. IN A FEW PLACES, CHRYSOLCOLLA FORMS 1-6 IN. THICK VEINS. DESCLOIZITE (LEAD VANADATE) LOCALLY FORMS THIN GREENISH-YELLOW COATINGS ON VEIN SURFACES. |
| Deposit | MAPS OF MINE WORKINGS AND LOCATION MAP AVAILABLE IN MOEN (1977) ; INFO.SRC : 1 PUB LIT |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-NOV-1981 | Caress, Mary E. (Evarts, Russ) | U.S. Geological Survey | |
| Updater | 01-NOV-1992 | Peterson, Jocelyn A. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.