Mine Index 10086313 Oldenburg (John), Oldenburg Mine

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	S-T-R	1(Center of W1/2)-28N-1W
	County:	Jo Daviess
	Quadrangle:	Galena
	District:	Upper Mississippi Valley
	Subdistrict:

Mine Index Number: 10086313

ISGS ID:		MSHA ID:
MAS ID:		MRDS ID:	W800198
Company Name:	Oldenburg (John)
Mine/Site Name:	Oldenburg Mine
Active/Abandoned:	Abandoned
Start Date:	1870	End Date:	1907
Commodity Type:	Metallic
Commodity:	Lead, Zinc
Minerals Present:	Dolomite, Calcite, Quartz, Sphalerite, Marcasite, Pyrite
Type of Mine:	Underground
District:	Upper Mississippi Valley	Subdistrict:
County:	Jo Daviess
Section/Township/Range:	1(Center of W1/2)-28N-1W
Latitude,Longitude:	42.4530699999998,-90.4434399999998
Unit(s) Mined:
Feature(s) Mined:
MRDS Link:	https://mrdata.usgs.gov/mrds/show-mrds.php?dep id=10086313
Mindat link:

Discussion

Sometimes Spelled Oldenberg

IN 1905, THIS MINE WAS ONE OF THE BEST KNOWN MINES NEAR GALENA.

THIS IS AN EXAMPLE OF A HONEYCOMB DEPOSIT. ONE OF THE LARGEST TOP-RUN MINES IN THE DISTRICT.

Mine Data

Ore body information

General form	SHEETED
Thickness	9.14M
Depth to bottom	22.86M
Depth to top	7.62M
Length	243.84M

Controls for ore emplacement

The Ore Is Richest Where Small N-S Striking Crevices Cross The Main E-W Crevice.

ORE OCCURS IN A BRECCIA ALONG EASTWARD-TRENDING MINERALIZED JOINT. THE PROSSER CHERTY MEMBER IS PART OF THE GALENA DOLOMITE.

Workings at the site

Type of workings	Underground
Name of workings	LOWER SHAFT
Overall depth	30.48M
Overall length	243.84M
Overall width	9.14M
Type of workings	Underground
Name of workings	UPPER SHAFT
Overall depth	42.67M

THE ORE BODY WAS 40 FT THICK, 800 FT LONG, AND AS MUCH AS 30 FT WIDE. THE DEPOSIT IS ALONG TWO NEARLY PARALLEL E-W STRIKNING CREVICES. WATER FLOW IS REPORTED TO HAVE BEEN FAIRLY STRONG.

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.

GRANT, 1903, P. 73.

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.

External Links

Mineral Resources Data System (MRDS) USGS Link
https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10086313