Washington · Skamania County
Prospect

Margaret

Skamania County, Washington, United States
CopperMolybdenumGoldSilverZincArsenicLead
⌖ Show on mapUSGS source ↗
Commodities
PrimaryCopper, Molybdenum
SecondaryGold, Silver
TertiaryZinc, Arsenic, Lead
Commodity typeM
Deposit
Deposit typeporphyry Cu
Model53: Porphyry Cu78: Porphyry Cu-Au
Deposit sizeN
WorkingsUnderground
Orebody formSTOCKWORK, DISSEMINATED
Ore controlBrecciation Of Host Rocks
Materials
Ore mineralsBornite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Galena, Magnetite, Malachite, Molybdenite, Pyrite, Sphalerite
GangueBiotite, Calcite, Chlorite, Epidote, Goethite, Hematite, Kaolinite, Limonite, Quartz, Sericite, Tourmaline
Geology
Host rockQuartz Diorite · Spirit Lake Pluton, Main Phase
Associated rockAndesite · Spirit Lake Pluton, Main Phase
Tectonic settingCascade Volcanic Arc
AlterationPotassic, Phyllic, Argillic, Propylitic Outward. Propylitic Can Overprint Phyllic Zone
Economic & production
Development statusProspect
Identification
Deposit ID10097315
MRDS IDM700154
Alternate namesEarl Group, Earl Nos. 1-13, Golconda, Polar Star Group (1-11), Samson Group, Germania
RegionNA
Data scoreA
Coordinates46.3562, -122.08202
References
HOLLISTER, V.F., 1979, PORPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 23-25.HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 78.LANDES, HENRY, THYNG, W.S., LYON, D.A., AND ROBERTS, MILNOR, 1902, THE METALLIFEROUS RESOURCES OF WASHINGTON, EXCEPT IRON: WASHINGTON GEOLOGICAL SURVEY ANNUAL REPORT FOR 1901, V.I, PT. 2, P. 134.MOEN, W.S., 1977, ST. HELENS AND WASHOUGAL MINING DISTRICTS OF THE SOUTHERN CASCADES OF WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES INFORMATION CIRCULAR 60, P. 17, 25.MCFARLAND, C.R., MCLUCAS, G.B., RIGBY, J.R, AND STOFFEL, K.L., 1980, DIRECTORY OF WASHINGTON MINING OPERATIONS, 1979: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES INFORMATION CURCULAR 69, P. 9.DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1991, METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 338-339.DERKEY, R.E., GULICK, C.W., AND LINGLEY, W.S., JR., 1993, WASHINGTON'S MINERAL INDUSTRY - 1992: WASHINGTON GEOLOGY, V. 21, NO. 1, P. 3-25.Phillips, W. M., compiler, 1987, Geologic map of the Mount St. Helens quadrangle, Washington and Oregon: Washington Division of Geology and Earth Resources Open File Report 87-4, 59 p., 1 plate.DERKEY AND OTHERS (1990) CITING DUVAL DATA