Mine detail: Gray Mine

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Location: Jo Daviess County, Illinois, United States, North America
Lat / long: 42.35168, -90.39594
dep_id: 10086334
mrds_id: W800228
Commodity type: metallic
Major mineral: Zinc
Trace mineral: Cadmium
Operation type: Unknown
Production size: Production occurred
Development status: Unknown
ore: Sphalerite
gangue: Calcite, Dolomite, Pyrite, Quartz
work_type: Underground
model: 224: Mississippi Valley, S.E. Missouri Pb-Zn
alteration: Leaching, Silicification, Dolomitization
conc_proc: Replacement
ore_ctrl: Solution Brecciation And Replacement
Reporter: Hedgman, Cheryl (Cannon, W.), Sutohin, D.M., Mason Jr., G.T.
hrock_unit: Mcgregor;Galena Dolomite
hrock_type: Limestone,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., Bautsch-Black Jack Trough
tectonic: Stable Sedimentary Platform Having Later Mild Regional Deformation Sufficient To Produce Major And Minor Folds, Faults, Fracture Zones, And Joints.
Year first produced: 1944
yr_lst_prd: 1949
disc_yr: 1926
discr: New Jersey Zinc
References:
  • 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:: ZINNER AND LINCOLN, 1946.
  • Deposit:: LYONS, HEYL, AND AGNEW, 1949.
  • 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.
  • Reserve-Resource:: HEYL AND OTHERS, 1959, P. 180.
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