Commodities
PrimaryZinc
SecondaryLead
Commodity typeM
Deposit
Model224: Mississippi Valley, S.E. Missouri Pb-Zn
Deposit sizeY
WorkingsUnderground
Materials
Ore mineralsChalcopyrite, Galena, Sphalerite
GangueCalcite, Dolomite, Pyrite, Quartz
Geology
Host rockLimestone · Guttenberg Member, Decorah Formation;Prosser Cherty Member, 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 years1919-21; 1941-43
First production1919
Last production1943
Discovery year1919
Identification
Deposit ID10086155
MRDS IDW800005
RegionNA
Data scoreB
Coordinates42.49751, -90.40428
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. 184.