Mine detail: Graham-Snyder Mine

Previously called ''

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Location

Lat / long:

42.47918, -90.43067

Resource(M)

Primary:	Zinc
Tertiary:	Lead
Ore:	Sphalerite
Gangue:	Calcite, Dolomite, Pyrite, Quartz
Discovery year:	1946

Production

Operation type:	Unknown
Production size:	Yes
Development status:	Past Producer
Production years:	194701953; REOPENED IN 1955, AND IN OPERATION IN JUN 1957.
First production started:	1947

Geology

Host rock:	Quimbys Mill Member, Platteville Formation;Stewartville Member, Galena Dolomite
Host type:	Limestone,Dolomite
Associated rock:	Spechts Ferry
Associated type:	Shale,Limestone
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	W800154
DEP	10086277
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}{Production:: HEYL AND OTHERS, 1959.}
Reporter	Hedgman, Cheryl (Cannon, W.F.), Sutphin, David M., Mason Jr., G.T.