Zalla M

Occurrence in Ferry county in Washington, United States with commodities Silver, Copper, Gold
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10055910
MRDS ID SP00122
Record type Site
Current site name Zalla M

Geographic coordinates

Geographic coordinates: -118.83447, 48.76123 (WGS84)

Site location context

Political divisions (FIPS codes)

Ferry(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bodie Mountain(quadrangle 1:24,000 scale)

Republic(quadrangle 1:100,000 scale)

Okanogan(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Sanpoil(hydrologic unit)

Upper Columbia(hydrologic accounting unit)

Upper Columbia(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Washington Ferry

Public Land Survey System information

Meridian Township Range Section Fraction State
038N 032E 30 W2 Washington

Comments on the location information

  • A FEW HUNDRED YARDS EAST OF THE FERRY-OKANOGAN COUNTY BOUNDARY LINE

Commodities

Commodity Importance
Silver Primary
Copper Primary
Gold Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Fluorite Ore
Galena Ore
Hessite Ore
Krennerite Ore
Calcite Gangue
Chlorite Gangue
Epidote Gangue
Pyrite Gangue
Quartz Gangue
Sericite Gangue
Zoisite Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Alkalic Volcanic Rock > Phonolite
    Stratigraphic age (youngest) Eocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -118.83447, 48.76123

Economic information

Controls for ore emplacement

  • Mineralization Is In A Well-Defined 1-6-Ft.-Wide Quartz Vein Filling An Irregular Fracture In Phonolite. The Vein Is Sparsely Mineralized And Low Grade Except In The Zone Of Secondary Enrichment, Which Extends From The Surface To A Depth Of About 150 Ft. (Huntting, 1956, P. 295). Wall Rock Adjacent To The Vein Is Brecciated And Sheared, And The Breccia Is Cemented By Quartz, Chlorite, And Fluorite. Ore Was Mined From Ore Shoots In The Zone Of Secondary Enrichment (Moen, 1980, P. 70).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name Sheridan

Comments on development

  • ECON.COM: PRODUCED $40,000 WORTH OF ORE PRIOR TO 1903; ORE WAS SHIPPED FROM THE DUMP IN 1935 (HUNTTING, 1956, P. 295).

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE ZALLA M IS IN FLOWS AND BRECCIAS OF THE EOCENE KLONDIKE MOUNTAIN FORMATION. THE ROCKS APPEAR TO BE RHYOLITIC IN COMPOSITION, BUT ON CLOSE EXAMINATION, OUTLINES OF WHAT APPEAR TO BE PYROXENE PHENOCRYSTS ARE FOUND. THIS SUGGESTS THE ROCKS ARE PROBABLY ALTERED ANDESITE (STOFFEL, 1990, GEOL. MAP, P. 11; PEARSON, 1967, GEOL. MAP). ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1991 Berger, Mary A. U.S. Geological Survey
Updater 01-AUG-1992 Frank, Dave U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.