Commodities
PrimaryManganese
Commodity typeM
Deposit
Deposit sizeN
Ore controlThe Deposit Is Lens Shaped. Limestone, So Prevalent In Deposits Of The Area, Is Present Only In Small Quantities At The Skunk Creek No. 1 Deposit (Data From Usgs, Mrds, 1990). Manganese Deposits Of The Region Are Associated With Spilites (Park, 1942, P. 311-312) And Commonly Are Found With Reddish Pelagic Limestone Interbedded With The Basalt. Manganese Mineralization May Be Either Disseminated In Replacement Bodies Or Volcanogenic Exhalative/Diagenetic Bodies (Sorem And Gunn, 1967).
Materials
Ore mineralsBementite, Pyrolusite, Rhodonite
GangueChlorite, Garnet, Limestone, Pyrite, Quartz, Spessartite
Other materialsGoethite, Hematite
Geology
Host rockArgillite
Tectonic settingHost Rocks Of Manganese Deposits Of The Olympic Penninsula Formed At An Ocean Ridge Or In A Back Arc Basin At The Active Margin Of The North American Plate (Garrison, 1973; Snavely, 1987, P. 306-309).
Economic & production
Development statusOccurrence
Identification
Deposit ID10055916
MRDS IDSP00128
RegionNA
Data scoreB
Coordinates47.37229, -123.87821
References
WDGER OFR 90-18GARRISON, R.E., 1973, SPACE-TIME RELATIONS OF PELAGIC LIMESTONES AND VOLCANIC ROCKS, OLYMPIC PENNINSULA, WASHINGTON: GEOLOGICAL SOCIETY OF AMERICA BULLETIN, V. 84, NO. 2, P. 583-594.MAGILL, E.A., 1960, MANGANESE DEPOSITS OF THE OLYMPIC PENNINSULA, WASHINGTON: U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS 5530, 82 P.PARK, C.F., JR., 1942, MANGANESE RESOURCES OF THE OLYMPIC PENNINSULA, WASHINGTON--A PRELIMINARY REPORT: U.S. GEOLOGICAL SURVEY BULLETIN 931-R, P. 435-457, 2 PL.SNAVELY, P.D., JR., 1987, TERTIARY GEOLOGIC FRAMEWORK, NEOTECTONICS, AND PETROLIUM POTENTIAL OF THE OREGON-WASHINGTON CONTINENTAL MARGIN. IN SCHOLL, D.W.; GRANTZ, ARTHUR; VEDDER, J.G., GEOLOGY AND RESOURCES POTENTIAL OF THE CONTINENTAL MARGIN OF WESTERN NORTH AMERICA AND ADJACENT OCEAN BASINS--BEAUFORT SEA TO BAJA CALIFORNIA: CIRCUM-PACIFIC COUNCIL FOR ENERGY AND MINERAL RESOURCES EARTH SCIENCE SERIES , V. 6, P. 305-335.SOREM, R.K.; GUNN, D.W., 1967, MINERALOGY OF MANGANESE DEPOSITS, OLYMPIC PENNINSULA, WASHINGTON: ECONOMIC GEOLOGY, V. 62, NO. 1, P. 22-56.