| Deposit ID | 10148836 |
|---|---|
| MRDS ID | W014738 |
| MAS/MILS ID | 0300770183 |
| Record type | Site |
| Current site name | Pioneer Placer |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -112.95311, 46.52409 (WGS84) |
| Elevation | 1402 |
| Location accuracy | 10(meters) |
Political divisions (FIPS codes)
Powell(county)
Montana(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Griffin Creek(quadrangle 1:24,000 scale)
Elliston(quadrangle 1:100,000 scale)
Butte(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Clark Fork(hydrologic unit)
Pend Oreille(hydrologic accounting unit)
Kootenai-Pend Oreille-Spokane(hydrologic subregion)
Pacific Northwest(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Montana | Powell |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Montana Principal | 009 N | 011 W | 23 | SWNWNW | Montana |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Materials | Type of material |
|---|---|
| Gold | Ore |
| Quartz | Gangue |
| Pyrite | Gangue |
| Magnetite | Gangue |
| Model code | 119 |
|---|---|
| USGS model code | 39a |
| Deposit model name | Placer Au-PGE |
| Mark3 model number | 54 |
| Host or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Unconsolidated Deposit > Glacial Sediment | ||||
| Rock type qualifier | GLACIAL DRIFT | ||||
| Rock unit name | Unconsolidated sand and gravel | ||||
| |||||
| Host or associated | Host |
|---|---|
| Rock type | Unconsolidated Deposit > Alluvium |
| Rock type qualifier | SUBANGULAR TO ROUNDED COBBLES OF GRANITE QUARTZITE, DIORITE, AND HORNFELS AND CONTAINS MINOR AMOUNTS OF SAND AND GRAVEL |
| Rock unit name | Unconsolidated sand and gravel |
| Ore Body (1) | -112.95311, 46.52409 |
|---|
| Type of structure | Regional |
|---|---|
| Structure name | ROYAL STOCK |
| Operation type | Placer |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Significant | Yes |
| District name | Pioneer |
|---|
| Ownership category | Unknown |
|---|
| Year | 1959 |
|---|---|
| Period | 1861-1959 |
| Material | gold |
| Ore mined | 9mt |
| Accuracy | Estimate |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0300770183 | |
| USGS | Mineral Resources Data System | MRDS | W014738 | MAS references MRDS |
| USGS | Mineral Resources Data System | MRDS | DB02198 | From Deposit ID 10015911 (Lower Pioneer Gulch Placer) |
| USGS | Mineral Resources Data System | MRDS | DB02199 | From Deposit ID 10015912 (K&K Bar & Middle E. Fork of Pioneer Cr. Placer) |
| USGS | Mineral Resources Data System | MRDS | DB02202 | From Deposit ID 10015914 (Pioneer Bar Placer) |
PARDEE J T, 1951, USGS BULL. 978-C, P.77-79,91.
ALSO LOCATED T9N R11W SECTIONS 14,22.
FORMERLY OPERATED BY PIONEER PLACER DREDGING COMPANY
| Subject category | Comment text |
|---|---|
| Deposit | DEPTH VARIES FROM 15-50 FT. OVERBURDEN OF TAILINGS FROM EARLIER MINING OPERATIONS ON PIONEER BAR WERE REWORKED. |
| Deposit | "PAY STREAK" RANGED IN THICKNESS FROM 2-50 FT. THICK |
| Deposit | SIX TERRACES 100 TO 300 FT WIDE, THROUGH VERTICAL DISTANCE OF 200 FT. GRAVELS ARE 8-12 FT. THICK OVER BEDROCK OF TERTIARY CLAY. |
| Deposit | Merged data from Deposit ID's 10015912 (K&K Bar and E. Fork of Pioneer Placer), 10015911 (Lower Pioneer Gulch Placer), and 10015914 (Pioneer Bar Placer) |
| Deposit | MUCH OF THE PLACER GOLD WAS COATED BY LIMONITE. 3 STAGES OF GLACIATION WITH A NOTED DECREASE IN GOLD FROM THE OLDEST TO THE YOUNGEST. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 25-SEP-92 | Western Field Operations Center (WFOC) | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.