Mine detail: Northwestern Mine

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Location: Jo Daviess County, Illinois, United States, North America
Lat / long: 42.49862, -90.39678
dep_id: 10086254
mrds_id: W800126
Commodity type: metallic
Major mineral: Zinc
Minor mineral: Lead
Operation type: Unknown
Production size: Production occurred
Development status: Unknown
ore: Galena, Sphalerite
gangue: Calcite, Dolomite, Pyrite, Quartz
orebody_fm: ARCUATE
work_type: Underground
model: 224: Mississippi Valley, S.E. Missouri Pb-Zn
alteration: Leaching, Silicification, Dolomitization
conc_proc: Replacement
Reporter: Hedgman, Cheryl (Cannon, W.F.), Sutphin, David M., Mason Jr., G.T.
hrock_unit: Ion Member;Guttenberg Member
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., On The Same Syncline That Contains The Northwestern, Vinegar Hill, South Unity, Hughlett And Gray, And North Unity Mines.
tectonic: Stable Sedimentary Platform Having Later Mild Regional Deformation Sufficient To Produce Major And Minor Folds, Faults, Fracture Zones, And Joints.
Year first produced: 1904
ylp_ba: >
yr_lst_prd: 1913
disc_yr: 1903
prod_yrs: FROM 1904 TO AFTER 1913 WITH SOME INTERRUPTIONS.
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:: COX, G.H., 1914, LEAD AND ZINC DEPOSITS OF NORTHWESTERN ILLINOIS: ILLINOIS GEOLOGICAL SURVEY BULLETIN 21, 120 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.
  • Production:: HEYL AND OTHERS, 1959, P. 184.
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