Mine detail: Margaret

Previously called 'Earl GroupEarl Nos. 1-13Samson GroupGermaniaGolcondaPolar Star Group (1-11)'

Location:	Skamania County, Washington, United States, North America
Lat / long:	46.3562, -122.08202
dep_id:	10097315
mrds_id:	M700154
Commodity type:	metallic
Major mineral:	Copper, Molybdenum
Minor mineral:	Gold, Silver
Trace mineral:	Zinc, Arsenic, Lead
Operation type:	Unknown
Deposit type:	porphyry Cu
Production size:	No production occurred
Development status:	Prospect
ore:	Bornite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Galena, Magnetite, Malachite, Molybdenite, Pyrite, Sphalerite
gangue:	Biotite, Calcite, Chlorite, Epidote, Goethite, Hematite, Kaolinite, Limonite, Quartz, Sericite, Tourmaline
orebody_fm:	STOCKWORK, DISSEMINATED
work_type:	Underground
model:	{53: Porphyry Cu}{78: Porphyry Cu-Au}
alteration:	Potassic, Phyllic, Argillic, Propylitic Outward. Propylitic Can Overprint Phyllic Zone
ore_ctrl:	Brecciation Of Host Rocks
Reporter:	Caress, Mary E. (Evarts, Russ), Peterson, Jocelyn A., Causey, J. Douglas, Lasmanis, Raymond, Hughes, Curt A., Berger, Mary A.
hrock_unit:	Spirit Lake Pluton, Main Phase
hrock_type:	Quartz Diorite
arock_unit:	Spirit Lake Pluton, Main Phase
arock_type:	Andesite
tectonic:	Cascade Volcanic Arc
References:	Deposit:: HOLLISTER, V.F., 1979, PORPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 23-25. Deposit:: HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 78. Deposit:: 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. Deposit:: 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. Deposit:: 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. Deposit:: 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. Deposit:: DERKEY, R.E., GULICK, C.W., AND LINGLEY, W.S., JR., 1993, WASHINGTO* MINERAL INDUSTRY - 1992: WASHINGTON GEOLOGY, V. 21, NO. 1, P. 3-25. Geology:: 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. Reserve-Resource:: DERKEY AND OTHERS (1990) CITING DUVAL DATA