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  3. Mineral Resource Data System (MRDS)

Bad Grund

Past Producer in Niedersachsen, Germany with commodities Lead, Silver, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Ore body information
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Ownership information
  12. Production statistics
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10280004
MAS/MILS ID 4280200001
Record type Site
Current site name Bad Grund
Alternate or previous names Grund Mine

Geographic coordinates

Geographic coordinates: 10.2423, 51.81205 (WGS84)

Site location context

Political divisions (FIPS codes)

Niedersachsen(province)

Germany(country)

Europe(continent)

Land(continent)

Geographic areas

Country State
Germany Niedersachsen

Commodities

Commodity Importance
Lead Primary
Silver Secondary
Zinc Critical Primary

Nearby scientific data

(1) 10.2423, 51.81205
ListMap

Economic information

Ore body information

  • Strike N70W
    Dip 83W
    Length 6000M
    Width 25M
    Depth to top 350M
    Field Value
    Type of Orebody #1 STOCKWORK
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 FISSURE VEIN
    Primary Ore Control FAULTING
    Degree of Wallrock Alter. INTENSE
    Strike And Dip N70W:83W
    Date of Last Modification 830812

Comments on the geologic information

  • THE INDICATED AGE OF THE GEOLOGICAL FORMATION IS LOWER CARBONIFEROUS. ORE VEINS HAVE WIDTHS OF A FEW CM UP TO 40 M WIDE AND OCCUR IN A SHEAR OR HIGHLY FRACTURED ZIND UP TO 50 M WIDE.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1450
Mining method Filled Stopes - Horiz Cut and Fill W/Tailings
Year of first production 1777
Milling method Flotation

Mining district

District name Niedersachsen

Mineral rights holdings

Type of mineral rights Unknown

Ownership information

  • Type Owner-Operator
    Owner Preussag Ag Metall
    Interest 100
    Home office Germany Fr
    Year 1989

Production statistics

  • Year 1981
    Description Ore Input Is 3.2% Pb And 6.65% Zn; Out-Put Is 75% Pb And 60% Zn 407000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Zinc Zinc 7wt-pct
    Major Ore Lead Lead 3wt-pct

Comments on the production information

  • PRODUCT C REFLECTS TOTAL RECOVERED SILVER IN BOTH CONCENTRATES. MOST CONTAINED SILVER IS IN THE LEAD CONCENTRATE.
  • UNTIL 1777 SPORADIC MINING, THEN INCREASE

Reserves and resources

  • Type In-situ
    Estimate year 1978
    Measured 4000000mt ore
    Demonstrated 4000000mt ore
    Inferred 2000000mt ore
    Total resources 6000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 6 wt-pct Zinc Major 1978
    Lead Pb 4 wt-pct Lead Major 1978
    Copper Cu 0.1 wt-pct Copper 1978
    Silica SiO2 0.005 wt-pct Silica 1978
  • Type In-situ
    Estimate year 1993
    Demonstrated 2450000mt ore
    Total resources 2450000mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 10.5 wt-pct Zinc Major 1993
    Lead Pb 2.8 wt-pct Lead Major 1993

Comments on the reserve resource information

  • DATA FROM PAH REPORT.
  • ERZBERGWERK GRUND. NO SPECIFIC COSTS IN BH.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method HORIZ CUT & FILL W/TAILINGS 10-60
    Percent Recovery 100
    Hardness of Rock UNKNOWN
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    Number of Shafts 4
    Slope of Inclines 13
    1st Condition of Workings OPEN
    Capacity 1800
    Capacity Units MT ORE/DAY
    Operating Days per Year 255
    Operating Shifts per Day 3
    Year of Information 1989

Reference information

Bibliographic references

  • Reserve-Resource

    E&MJ INTERNATIONAL DIRECTORY OF MINING, 1991

  • Reserve-Resource

    AME MINERAL ECONOMICS QUARTERLY MINE ANALYSIS, JUNE 1993,

  • Reserve-Resource

    P. 38, 48.

  • Deposit

    WORLD MINES REGISTER 1976-77 P 91

  • Deposit

    P. 100-109.

  • Deposit

    WORLD MINING REGISTER 1976-77, P. 91.

  • Deposit

    MINING IN THE HARZ MOUNTAIN, MINING MAGAZINE, FEB., 1978,

  • Deposit

    PP. 100-109.

  • Deposit

    PREUSSAG AKTIENGESELLSCHAET METALL, ENG./MINING JOURNAL.INT-

  • Deposit

    ERNATIONAL DIRECTORY OF MINING, 1980, P. 295.

  • Deposit

    PREUSSAG AKTIENGESELLSCHAFT METALL AND PREUSSAG BOLIDEN BLEI

  • Deposit

    GMBH ENG./MINING JOURN. INT. DIRETORY OF MINING 1980,

  • Deposit

    P. 123.

  • Deposit

    PREUSSAG METALL, COMP. PUB., MAY, 1981 (IN GERMAN)

  • Deposit

    SPERLING, H., ON THE METALLOGENETIC SETTING OF THE ORE DEPO-

  • Deposit

    SITS IN THE HARZ, ERZMETALL 33, NR. 3, 1980, PP. 134-136.

  • Deposit

    WYLLIE, R.J.M., BERGBAU U1- LISTENING AS WELL AS LOOKING,

  • Deposit

    WORLD MINING, SEPT., 1981, P. 52.

  • Deposit

    PERSONAL COMMUNICATION WITH STAFF, SEPT., 1981.

General comments

Subject category Comment text
Deposit 625 EMPLOYEES, PB ORE, ZN ORE, 1,800TPD TOTAL, PB-AG 2,000TP LS AND CONC PRODUCED AND CAPACITY, PB 60TPD, AG 80 KG/DAY, Z 80TPD, UNDERGROUND MINE DEVELOPED BY-VERTICAL SHAFT,SYSTEM O GROUND MINING, MECHANIZED CUT AND FILL, SUB LEVEL CAVING, OR TYPE OF PROCESSING AND CAPACITY, HEAVY MEDIA SEPARATION, 2,2 FLOTATION-1,300 TPD REDUCED TOTAL WORKFORCE: 550 EMPLOYEES

Reporter information

Type Date Name Affiliation Comment
Reporter 13-JAN-1995 Difrancesco, Carl A. U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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