Commodities
PrimaryZinc
TertiaryLead
Commodity typeM
Deposit
Model224: Mississippi Valley, S.E. Missouri Pb-Zn
Deposit sizeY
WorkingsUnderground
Orebody formARCUATE
Ore controlFractures
Materials
Ore mineralsSphalerite
GangueCalcite, Dolomite, Pyrite, Quartz
Geology
Host rockLimestone,Dolomite · Decorah Formation;Galena Dolomite
StructureSoutheast Of Wisconsin Dome And On The Gentle West Limb Of Wisconsin Arch. To The South Is Illinois Basin And To The West And Southwest Is Forest City Basin. A Few Minles South O Fthe Zinc-Lead District Is Westward-Trending Savanna-Sabula Anticline. Regional Strike Is N 85 W And The Dip Is South., On The Same Syncline That Contains The Northwestern, Vinegar Hill, South Unity, Hughlett And Gray, And North Unity Mines.
Tectonic settingStable Sedimentary Platform Having Later Mild Regional Deformation Sufficient To Produce Major And Minor Folds, Faults, Fracture Zones, And Joints.
AlterationLeaching, Silicification, Dolomitization
Economic & production
Development statusPast Producer
Production yearsOPEND IN 1914 AND MINED AT INTERVALS TO 1948. THE MINE WAS OPENED FROM MAY 1942 TO MAY 1943 FOR ROBBING BY GILL BROTHERS. REOPENED FOR ROBBING AND STOPING APR 1945 TO SEP 1947.
First production1914
Last production1948
Discovery year1913
Identification
Deposit ID10106499
MRDS IDW800092
RegionNA
Data scoreB
Coordinates42.50279, -90.40567
References
HEYL, A.V., AGNEW, A.F., LYONS, E.J., AND BEHRE, C.H., JR., 1959, THE GEOLOGY OF THE UPPER MISSISSIPPI VALLEY ZINC-LEAD DISTRICT: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 309, 310 P.WILLMAN, H.B., REYNOLDS, R.R., AND HERBERT, PAUL, JR., 1946, GEOLOGICAL ASPECTS OF PROSPECTING AND AREAS FOR PROSPECTING IN THE ZINC-LEAD DISTRICT OF NORTHWESTERN ILLINOIS: ILLINOIS GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS, NO. 116, 48 P.HEYL AND OTHERS, 1959, P. 183.