The Seacrest is a copper and molybdenum mine located in Snohomish county, Washington at an elevation of 3,999 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 3,999 Feet (1,219 Meters)
Commodity: Copper, Molybdenum
Lat, Long: 47.95306, -121.41472
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Seacrest MRDS details
Site Name
Primary: Seacrest
Secondary: Silver Creek
Secondary: New York
Commodity
Primary: Copper
Primary: Molybdenum
Secondary: Nickel
Secondary: Chromium
Tertiary: Zinc
Tertiary: Lead
Location
State: Washington
County: Snohomish
District: Silver Creek District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: In Snoqualmie National Forest
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Duval, Cities Service
Years: 1976 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Northern Cascade Mountains
Mineral Deposit Model
Model Name: Porphyry Cu
Orebody
Form: PERVASIVE FRACTURE FILLING, RARELY DISSEMINATED
Form: PERVASIVE FRACTURE FILLING, RARELY DISSEMINATED
Structure
Type: L
Description: Transverse Fractures
Alterations
Alteration Type: L
Alteration Text: Ubiquitous Hydrothermal Alteration, Propylitic, Weak Potassic
Rocks
Name: Ultramafic Intrusive Rock
Role: Associated
Age Type: Associated Rock
Age Young: Holocene
Name: Ultramafic Intrusive Rock
Role: Associated
Age Type: Associated Rock Unit
Age Young: Holocene
Analytical Data
Analytical Data: ANALYSES OF NUMEROUS SAMPLES YIELDED MAXIMUMS OF 11.6% CU, 0.374% NI, 0.63% CR
Materials
Ore: Molybdenite
Ore: Pyrite
Ore: Chalcopyrite
Comments
Comment (Development): DEPOSIT MAY BE AMENABLE TO HEAP LEACHING
Comment (Deposit): PORPHYRY COPPER DEPOSIT IS ZONED WITH A CRUDE CU-MO CORE AND A PB-ZN PERIPHERY. DRILL CORES INTERSECTED ULTRAMAFIC ROCKS CONTAINING NI AND CU. THE PORPHYRY COPPER APPARENTLY WAS OVERPRINTED ON THE TERRANE CONTAINING THE ULTRAMAFIC DEPOSITS. STRIKE GIVEN IS TREND OF ULTRAMAFIC ROCKS
Comment (Workings): DRILL CORES
Comment (Reserve-Resource): INFERRED, SUBECONOMIC RESOURCES. LOCALIZED OCCURRENCES OF 0.5% CU ARE PRESENT IN ALTERED INTRUSIVE ROCKS
Comment (Geology): GEOLOGIC MAP INDICATES BRECCIA IS INTRUSIVE RATHER THAN VOLCANIC
Comment (Deposit): SEE ALSO MRDS RECORD MP00186
References
Reference (Deposit): CHURCH, S.E., TABOR, R.W., AND JOHNSON, F.L., 1983, MINERAL RESOURCE POTENTIAL OF THE GLACIER PEAK ROADLESS AREA, SNOHOMISH COUNTY, WASHINGTON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-1380-C, SCALE 1:50,000.
Reference (Deposit): JOHNSON, F.L., DENTON, D.K., IVERSON, S.R., MCCULLOCH, R.B., STEBBINS, S.A., AND STOTELMEYER, R.B., 1983, MINERAL RESOURCES OF THE GLACIER PEAK RARE II AREA (NO. L6031), SNOHOMISH COUNTY, WASHINGTON: U.S. BUREAU OF MINES OPEN-FILE REPORT MLA 75-83, P. 8, 18-19, 36.
Reference (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. 37.
Reference (Deposit): TABOR, R.W., FRIZZELL, V.A., JR., BOOTH, D.B., WHETTEN, J.T., WAITT, R.B., JR., AND ZARTMAN, R.E., 1982, PRELIMINARY GEOLOGIC MAP OF THE SKYKOMISH RIVER 1:100,000 QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 82-747, SCALE 1:100,000.
Reference (Deposit): HOLLISTER, V.F., 1979, PORPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 22-35.
Reference (Reserve-Resource): JOHNSON AND OTHERS
Washington Gold
"Where to Find Gold in Washington" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Washington.
