Commodities
PrimaryZinc
TertiaryLead
Commodity typeM
Deposit
Model224: Mississippi Valley, S.E. Missouri Pb-Zn
Deposit sizeY
WorkingsUnderground
Ore controlVertical Jointing
Materials
Ore mineralsGalena, Marcasite, Sphalerite
GangueCalcite, Dolomite, Pyrite, Quartz
Geology
Host rockDolomite · Galena Dolomite
Associated rockDolomite · Maquoketa
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.
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 yearsOPERATED INTERMTTENTLY TO 1910.
First production1903
Last production1910
Identification
Deposit ID10086402
MRDS IDW800325
Alternate namesCalifornia Diggings
RegionNA
Data scoreB
Coordinates42.30473, -90.39428
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.BAIN, H.F., 1905, ZINC AND LEAD DEPOSITS OF NORTHWESTERN ILLINOIS: U.S. GEOLOGICAL SURVEY BULLETIN 246, 56 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.