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Apex

Occurrence in Mason county in Washington, United States with commodities Manganese, Iron
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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. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Land status
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10047958
MRDS ID M700326
Record type Site
Current site name Apex
Alternate or previous names Black Rock Nos. 1, And 3
Related records 10155944

Geographic coordinates

Geographic coordinates: -123.34376, 47.49923 (WGS84)
Elevation 732
Location accuracy 250(meters)
Relative position ABOUT .7 MILE NE OF LIGHTNING PEAK (VABM 4654).

Site location context

Political divisions (FIPS codes)

Mason(county)

Washington(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lightning Peak(quadrangle 1:24,000 scale)

Shelton(quadrangle 1:100,000 scale)

Seattle(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Skokomish(hydrologic unit)

Puget Sound(hydrologic accounting unit)

Puget Sound(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Olympic National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Washington Mason

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 023N 005W 8 SE OF NE Washington

Comments on the location information

  • ON COPPER CREEK NEAR THE HEAD OF LAKE CUSHMAN. FROM HOODSPORT IT IS REACHED BY TRAVELING WEST ON 16-1/2 MILES OF WELL-MAIN-TAINED ROAD TO LINCOLN GUARD STATION, THENCE 2-1/2 MILES BY TRAIL. THE TRAIL LEADS DOWN THE NORTH FORK OF THE SKOKOMISH RIVER 1 MILE TO THE MOUTH OF COPPER CREEK. THE REMAINING 1-1/2 MILES IS VERY STEEP AND FOLLOWS THE CREEK TO THE WORKINGS.

Commodities

Commodity Importance
Manganese Critical Primary
Iron Secondary

Materials information

Materials Type of material
Bementite Ore
Rhodochrosite Ore
Jasper Gangue
Pyrite Gangue

Analytical data

Result ASSAYS: 43.1% MNO, 12.65% FEZO3, 3.87% CAO, 18.91% SIOZ.

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Metchosin Volcanics
    Rock description Metchosin Volcanics
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Metchosin
    Rock description Metchosin
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -123.34376, 47.49923
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description The Lens And Contiguous Pillow Basalt Are Affected By Faulting In The Western Sector Of The Deposit. Two Crossfaults With Opposing Dips Intersect Here; One Offsets The Ore A Few Feet. A Fault Of Greater Displacement Borders The Mineralized Lens On The Northwest And Has Produced A Horizontal Offset Of More Than 25 Feet. Variations In The Basalt-Jasper Contact In Holes 2 And 4 Strongly Suggest Faulting At Depth.

Ore body information

  • Strike N 70-75E
    Dip 90
    Length 76.2M
    Width 7.62M

Controls for ore emplacement

  • Ore Along Greenstone-Red Limestone Contact.

Comments on the geologic information

  • PILLOW BASALTS, RED LIMESTONE, GRAYWACKE, AND JASPER ARE THE PRINCIPAL COUNTRY ROCKS. THEIR GENERAL STRIKE IS N. 75 DEGREE E., AND THEIR AVERAGE DIP VERTICAL. A LARGE MANGANIFEROUS LENS CONTAINING JASPER AND SILICIFIED LIMESTONE OCCURS BETWEEN BASALT ON THE NORTH AND RED LIMESTONE ON THE SOUTH. THE NORTH CONTACT IS FAIRLY REGULAR; THE SOUTH CONTACT IS IRREGULAR. FROM DIAMOND-DRILL-CORE INTERSECTIONS IT IS APPARENT THAT THE CONTACT CONFORMS TO THE BEDDING OF THE LIMESTONE, EXCEPT NEAR THE WESTERN END OF THE DEPOSIT WHERE IT CUTS ACROSS THE BEDDING AND IS ACCOMPANIED BY A THICKENING OF THE ADJOINING RED LIMESTONE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Surface/Underground
    Length 235.61M

Comments on development

  • DIAMOND DRILLING, SURFACE TRENCHING.

Reference information

Bibliographic references

  • Deposit

    WDMG BULL 37, P. 260

  • Deposit

    USGS BULL 931-R, P. 455-456

  • Deposit

    USBM RI 5530, P. 60-62, 77

General comments

Subject category Comment text
Deposit LENS OF MN ORE ALONG A GREENSTONE-RED LIMESTONE CONTACT. THE DIMENSIONS OF THE MANGANIFEROUS-JASPER LENS ARE VERY IRREGULAR. THE LENS IS ABOUT 200 FEET LONG, HAS A MAXIMUM WIDTH ON THE SURFACE OF 28 FEET, AND HAS A MINIMUM DEPTH OF 100 FEET.
Deposit 3 CLAIMS. IN 1940 THE BUREAU OF MINES DRILLED SEVEN DIAMOND-DRILL HOLES, AGGREGATING 773 FEET IN LENGTH, ON THE APEX PROPERTY. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1982 Lawson, William A. (Evarts, Russell C.) U.S. Geological Survey

Beyond USGS

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

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