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Sunrise Prospect

Prospect in Snohomish county in Washington, United States with commodities Copper, Molybdenum, Tungsten, Silver, Gold, Lead, Zinc, Bismuth
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Geologic information

Identification information

Deposit ID 10095364
MRDS ID M025930
MAS/MILS ID 0530610002
Record type Deposit
Current site name Sunrise Prospect
Alternate or previous names Bren Mac, Vesper Peak, Brenmac

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -121.50451, 48.00841 (WGS84)
Elevation 1372
Relative position ABOUT 0.6 MI SOUTHEAST OF VESPER PEAK
(click for info)

Geographic areas

Country State County
United States Washington Snohomish

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 029N 010E 10,15 S2 (10); N/2 (15) Washington

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Tungsten Primary
Silver Secondary
Gold Secondary
Lead Tertiary
Zinc Tertiary
Bismuth Tertiary

Comments on the commodity information

  • ANALYSIS OF A CONCENTRATE YIELDED BI. DEPOSIT ALSO POSSIBLY CONTAINS RE

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore
Pyrrhotite Ore
Scheelite Ore
Galena Ore
Sphalerite Ore
Biotite Gangue
Chlorite Gangue
Epidote Gangue
Orthoclase Gangue
Quartz Gangue
Sericite Gangue
Siderite Gangue
Calcite Gangue

Alteration

  • (Local) Propylitic (In Wall Rock)Propylitic (In Wall Rock), Weak Potassic, Phyllic (In Pipe)
  • (Local) Weak Potassic
  • (Local) Phyllic (In Pipe)
  • (Local) Pyritization (In Wall Rock)

Analytical data

Result 0.002-0.006 OZ/TON AU, 0.049-0.088 OZ/TON AG. AVG GRADES: 0.319% CU, 0.071% MOS2, 0.062% WO3

Mineral occurrence model information

Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Tonalite
    Rock unit name Vesper Peak Stock
    Rock description Vesper Peak Stock;Vesper Peak Stock
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Eastern Melange Belt;Sunrise Breccia Pipe
    Rock description Eastern Melange Belt;Sunrise Breccia Pipe;Eastern Melange Belt;Eastern Melange Belt

Nearby scientific data

Main Entrance (1) -121.50451, 48.00841
ListMap

Geologic structures

Type of structure Local
Structure description Breccia Pipe

Ore body information

  • General form Pipe-like Stockwork Breccia
    Strike N30W
    Dip 80W
    Thickness 1500M
    Depth to top 0M
    Width 300M
    Length 1066M
    Area 638HA

Controls for ore emplacement

  • Brecciation: Brecciation Of Country Rock

Comments on the geologic information

  • From Derkey and others (1990, p. 366) The Sunrise breccia pipe is genetically related to Oligocene intrusive rocks, which crop out north of the pipe. Quartz diorite fragments increase in abundance with depth. The elliptical pipe was delineated by drilling and underground exploration. The exposed vertical extent of the pipe extends from an elevation of 5,000 ft to 3,000 ft (the elevation of the exploration adit). At an elevation of 5,000 ft, the pipe is 200 ft by 700 ft; at 3,000 ft, the dimensions are 350 ft by 900 ft. The cross-sectional area of the pipe continues to increase with depth. The pipe plunges at an angle of minus 70 degrees to the south.
  • From Derkey and others (1990, p. 366) Fragments in the Sunrise breccia pipe are 1 in. to several feet across; ore minerals line intersticies. Mineralization (mainly chalcopyrite and molybdenite) also occurs as disseminations in fragments and in fractured wall rocks adjacent to the pipe. The amount of disseminated chalcopyrite increases in quartz diorite with increasing depth. Fragments in breccia and country rock are hornfelsed. Two periods of brecciation are recognized; late east-northeast-trending high-angle faults offset breccia contacts. The Sunrise breccia pipe contains 71 million tons of measured, indicated, and inferred ore reserves averaging 0.319% Cu and 0.071% MoS2 (1972 data). Underground drilling (1,322 ft) indicated an average grade of 0.062% WO3; thirty chip samples ranged 0.04%-0.07% WO3. Assays ranged from 0.002 to 0.006 oz/ton Au and from 0.049 to 0.088 oz/ton Ag. A copper-molybdenite concentrate assayed 0.40% Pb, 0.80% Zn, and 0.18% Bi.
  • From Derkey and others (1990, p. 366) The Sunrise breccia pipe is elliptical in plan and is elongate northwest. The pipe cuts Eastern Melange rocks (Tabor and others, 1988) consisting of Jurassic greenstone, greywacke, and argillite. The breccia pipe lies 1,000 ft south of the Vesper Peak stock and is thought to be genetically related to that stock. Emplacement of the breccia pipe is thought to have been controled by an east-northeast-trending system of fracturing and sheeting (Glacier Peak belt).

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1897

Mining district

District name Sultan District
District name Sultan Basin

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights State Lease

Land status

Ownership category National Forest
Area name In Snoqualmie National Forest

Ownership information

  • Type Owner
    Owner W. E. Oldfield
    Home office Washington
    First year 1951
    Last year 1952
  • Type Owner-Operator
    Owner Bren Mac Mines, Ltd.
    Interest 100
    Home office Canada
    First year 1976

Reserves and resources

  • Type In-situ
    Estimate year 1972
    Total resources 22,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.36 wt-pct Copper Major 1972
    Molybdenum Mo 0.03 wt-pct Molybdenum Trace 1972
  • Type In-situ
    Estimate year 1973
    Inferred 64,397,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.35 wt-pct Copper Primary 1973
    Molybdenum MoS2 0.04 wt-pct Molybdenum Primary 1973
    Tungsten WO3 0.05 wt-pct Tungsten Primary 1973

Comments on the reserve resource information

  • RESERVE ESTIMATES OF 60 MILLION TONS AT 0.8% CU EQUIVALENT (HOLLISTER, 1979). BREN MAC MINES, INC., REPORTED TO HAVE BLOCKED OUT >40 MILLION TONS AT >0.9% RECOVERABLE CU EQUIVALENT (GRANT, 1976). DEPOSIT REPRESENTS ONE OF LARGEST W RESOURCES IN THE NORTHWEST

Workings at the site

  • Type of workings Underground
    Length 3200M

Comments on the workings information

  • ADITS, DRIFTS, CROSSCUTS, OPEN CUTS. OVER 18,000 FT OF DRILLING

Comments on development

  • BRECCIA PIPE EXPLORED TO A DEPTH OF 3,300 FT

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M025930
U.S. Bureau of Mines Minerals Availability System MAS 0530610002

Bibliographic references

  • Deposit

    HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 91.

  • Deposit

    BROUGHTON, W.A., 1942, INVENTORY OF MINERAL PROPERTIES IN SNOHOMISH COUNTY, WASHINGTON: WASHINGTON DIVISION OF GEOLOGY REPORT OF INVESTIGATIONS 6, P. 50.

  • Deposit

    CARITHERS, WARD, AND GUARD, A.K., 1945, GEOLOGY AND ORE DEPOSITS OF THE SULTAN BASIN, SNOHOMISH COUNTY, WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 36, P. 68-70.

  • Deposit

    DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1990 METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 366-367.

  • Deposit

    R.U. KING, U.S. GEOLOGICAL SURVEY, UNPUB DATA.

  • Deposit

    PUFFET, W., 1972

  • Deposit

    HOLLISTER, V.F., 1979, PORPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 32.

  • Deposit

    GRANT, A.R., 1969, CHEMICAL AND PHYSICAL CONTROLS FOR BASE METAL DEPOSITION IN THE CASCADE RANGE OF WASHINGTON: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 58, P. 74-78.

  • Deposit

    GRANT, A.R., 1976, REPORT OF EVALUATION, MINERAL RESOURCE ANALYSIS STUDY ON UNITED STATES FOREST SERVICE LAND, STATE OF WASHINGTON: PREPARED FOR U.S. FOREST SERVICE - REGION 6, CONTRACT NO. 004724N, P. 27,

  • Deposit

    BREN MAC MINES (SUMMARY REPORT) BY A.R. GRANT 1/7/74 LANGL

  • Reserve-Resource

    PUFFET, 1972

  • Deposit

    JAMES R. GLASS CONSULTING GEOLOGIST, 1971, SUNRISE BRECCIA PIPE ORE RESERVE REPORT; UNPUBLISHED REPORT IN WASHINGTON DEPARMENT OF GEOLOGY AND EARTH RESOURCES FILES.

  • Deposit

    PIERCE,PAUL, 1977, BRENMAC-SUNRISE PROPERTY, UNPUBLISHED BUMINES MAS (MINERAL AVAILABILITY SYSTEM) DEPOSIT SUMMARY REPORT, 62 P.

  • Deposit

    HEDDERLY-SMITH, DAVID A., 1975, GEOLOGY OF SUNRISE BRECCIA PIPE, SULTAN BASIN, SNOHOMISH COUNTY, WASHINGTON: UNIVERSITY OF WASHINGTON MASTER OF SCIENCE THESIS, 60P. 2 PLATES .

General comments

Subject category Comment text
Deposit MRDS RECORD D000692 HAS BEEN MERGED WITH THIS RECORD AND DELETED
Deposit DEPOSIT HAS BEEN GIVEN THE INFORMAL NAME OF A BRECCIA PIPE CU DEPOSIT, FOR WHICH THERE IS NO PUBLISHED MODEL. MINERALIZATION IS PREDOMINANTLY FOUND IN THE BRECCIA PIPE, BUT EXTENDS OUTWARD FROM IT IN DISSEMINATIONS. A PORPHYRY COPPER IS PRESUMED AT DEPTH
Deposit From Derkey and others (1990, p. 366) The property has been explored extensively and includes 17,338 ft of diamond drilling, 800 ft of percussion drilling, 3,728 ft of underground adits, 557 ft of drifts, and 1,256 ft of cross-cuts. Metallurgical testing of bulk samples was completed in 1971. The most recent evaluation was done by Brenmac. Companies that explore the pipe prior to Brenmac include Century Explorations Inc., Bear Creek Mining Co., and Malaspina Mining Co. The property consists of four lode claims and surrounding state leases. The four claims are the Elderado (sometimes called Eldorado), Oxdental (sometimes referred to as Oxedental, Occidental, or Oxidental), the Quaker City, the Wall Street, and the Sultan Basin Mining Co. mill site.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-85 Andrews, David H. (Lawson, William A.) U.S. Geological Survey
Updater 01-DEC-91 Peterson, Jocelyn A. U.S. Geological Survey
Reporter 01-FEB-91 Berger, Mary A. U.S. Geological Survey
Reporter 14-JUL-97 Ridenour, James U.S. Bureau of Mines