Mine detail: Black Hump

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Location:	Mason County, Washington, United States, North America
Lat / long:	47.53062, -123.32932
dep_id:	10055961
mrds_id:	SP00180
Commodity type:	metallic
Major mineral:	Manganese
Operation type:	Unknown
Production size:	No production occurred
Development status:	Occurrence
ore:	Bementite
ore_ctrl:	Manganese Deposits Of The Region Are Associated With Spilites (Park, 1942, P. 311-312). Manganese Mineralization May Be Either Disseminated In Replacement Bodies Or Volcanogenic Exhalative/Diagenetic Bodies (Sorem And Gunn, 1967).
Reporter:	Berger, Mary A., Frank, Dave
hrock_type:	Sandstone
tectonic:	Host 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).
References:	Deposit:: GARRISON, 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. Deposit:: 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. Deposit:: 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 P Deposit:: 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. Deposit:: SOREM, R.K.; GUNN, D.W., 1967, MINERALOGY OF MANGANESE DEPOSITS, OLYMPIC PENNINSULA, WASHINGTON: ECONOMIC GEOLOGY, V. 62, NO. 1, P. 22-56. Deposit:: TABOR, R.W.; CADY, W.M., 1978, GEOLOGIC MAP OF THE OLYMPIC PENNINSULA, WASHINGTON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATIONS SERIES MAP I-994, 2 SHEETS, SCALE 1:125,000 Deposit:: WDGER OF 90-18