Commodities
PrimaryIron, Lead, Zinc, Silver, Gold
Commodity typeM
Deposit
Deposit typeContact Metamorphic
Deposit sizeN
Ore controlWhere Granodiorite Is In Contact With Limestone, The Limestone Is Recrystallized To Marble And Partially Replaced By Garnet And Magnetite (Shedd And Others, 1922, P. 90-92). A Vein Near The Center Of One Of The Claims, Reported To Be 6 Feet Wide, Contains Abundant Galena And Sphalerite (Huntting ,1956, P. 196).
Materials
Ore mineralsGalena, Magnetite, Sphalerite
GangueGarnet, Pyrite
Geology
Host rockClastic Sedimentary Rock,Shale,Sandstone,Conglomerate
Tectonic settingThe Snoqualmie Batholith Complex Is Part Of Early Magmatism Of The Cascade Magmatic Arc. Mineralization Probably Occured During Emplacement Of A Later Phase Of The Batholith.
Economic & production
Development statusOccurrence
Identification
Deposit ID10055929
MRDS IDSP00141
Alternate namesMt. Logan, Summit;
RegionNA
Data scoreB
Coordinates47.44564, -121.4212
References
WDGER OFR 90-18FRIZZELL, V.A., JR.; TABOR, R.W.; BOOTH, D.B.; ORT, K.M.; WAITT, R.B., 1984, PRELIMINARY GEOLOGIC MAP OF THE SNOQUALMIE PASS 1:100,000 QUADRANGLE, WASHINGTON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 84-693, 42 P., 1 PL.GLOVER, S.L., 1942, WASHINGTON IRON ORES, A SUMMARY REPORT: WASHINGTON DIVISION OF MINES AND MINING REPORT OF INVESTIGATIONS 2, 23 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.SHEDD, SOLON, 1924, THE MINERAL RESOURCES OF WASHINGTON WITH STATISTIC FOR 1922; WITH AN ARTICLE ON COAL AND COKE, BY G.W. EVANS: WASHINGTON DIVISION OF GEOLOGY BULLETIN 30, 224 P.SHEDD, SOLON; JENKINS, O.P.; COOPER, H.H., 1922, IRON ORES, FUELS, AND FLUXES OF WASHINGTON: WASHINGTON DIVISION OF GEOLOGY BULLETIN 27, 160 P., 1 PL.