Mine detail: Royal Princess Mine

Previously called 'California Diggings'

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Location

Lat / long:

42.30473, -90.39428

Resource(M)

Primary:	Zinc
Tertiary:	Lead
Ore:	Galena, Marcasite, Sphalerite
Gangue:	Calcite, Dolomite, Pyrite, Quartz

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Past Producer
Production years:	OPERATED INTERMTTENTLY TO 1910.
First production started:	1903
Last production ended:	1910

Geology

Host rock:	Galena Dolomite
Host type:	Dolomite
Associated rock:	Maquoketa
Associated type:	Dolomite
Structure:	Southeast 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:	Stable Sedimentary Platform Having Later Mild Regional Deformation Sufficient To Produce Major And Minor Folds, Faults, Fracture Zones, And Joints.
Alteration processes:	Leaching, Silicification, Dolomitization

References

MRDS	W800325
DEP	10086402
Reference	{Deposit:: 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.}{Deposit:: BAIN, H.F., 1905, ZINC AND LEAD DEPOSITS OF NORTHWESTERN ILLINOIS: U.S. GEOLOGICAL SURVEY BULLETIN 246, 56 P.}{Deposit:: 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.}
Reporter	Hedgman, Cheryl (Cannon, W.F.), Sutphin, David M., Mason Jr., G.T.