Commodities
PrimaryCopper
Commodity typeM
Deposit
Model53: Porphyry Cu
Deposit sizeN
Orebody formBRECCIA PIPE, STOCKWORK
Ore controlMineralization Is Confined To Fractures And A Breccia Body. This Appears To Be Primarily A Porphyry Copper Deposit That Has No Other Metal Values. Reserves Are Given As Nearly 150 Million Tons Averaging 0.36% Cu. The Overall Waste To Ore Ratio Is 2.5:1.
Materials
Ore mineralsChalcopyrite, Bornite
GanguePyrite, Biotite, Chlorite, Oligoclase, Quartz, Sericite, Magnetite, Pyrrhotite
Geology
Host rockMafic Intrusive Rock,Diorite · Fawn Peak Stock
Associated rockAndesite
StructureThe Fawn Peak Stock Was Probably The Intrusive Rock Core Of An Island Arc (Riedell, 1979)
Economic & production
Development statusPast Producer
Identification
Deposit ID10056009
MRDS IDSP00251
Alternate namesLesley
RegionNA
Data scoreB
Coordinates48.61455, -120.38313
References
DERKEY, R.E.; JOSEPH, N.L.; LASMANIS, R., 1990, METAL MINES OF WASHINGTON-PRELIMINARY REPORT: STATE OF WASHINGTON, DEPARTMENT OF NATURAL RESOURCES, DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, 577 P.HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS-PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, 428 P.: V. 2, 67 P.STOFFEL, K.L.; MCGRODER, M.F., COMPILERS, 1990, GEOLOGIC MAP OF THE ROBINSON MOUNTAIN 1:100,000 QUADRANGLE, WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN FILE REPORT 90-5, 39 P., 1 PL.UNPUBLISHED INFORMATION: VANDERBILT GOLD CORPERATION, 1989, MAZAMA PROJECT DESCRIPTION. THIS REPORT IS IN DGER FILESWASH. GEOLOGIC NEWSLETTER, V. 18, NO. 1, MAR. 1990, P. 9, 17HOLLISTER, V.F., 1979, PORPHYRY COPPER-TYPE DEPOSITS OF THE CASCADE VOLCANIC ARC, WASHINGTON: MINERALS SCIENCE AND ENGINEERING, V. 11, P. 27-28.DERKEY, R.E., GULICK, C.W., LINGLEY, W.S., JR., 1993, WASHINGTON'S MINERAL INDUSTRY - 1992: WASHINGTON GEOLOGY, V. 21, NO. 1, P. 3-25.