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Maltby Limonite Mine

Past Producer in Dutchess county in New York, United States with commodity Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10105444
MRDS ID W000146
Record type Site
Current site name Maltby Limonite Mine

Geographic coordinates

Geographic coordinates: -73.49732, 41.96999 (WGS84)
Elevation 245
Relative position 1.2 MILES NE OF MILLERTON, N.Y.; 3.0 MILES W OF LAKEVILLE, CONN.

Site location context

Political divisions (FIPS codes)

Dutchess(county)

New York(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sharon(quadrangle 1:24,000 scale)

Waterbury(quadrangle 1:100,000 scale)

Hartford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Housatonic(hydrologic unit)

Connecticut Coastal(hydrologic accounting unit)

Connecticut Coastal(hydrologic subregion)

New England(hydrologic region)

Geographic areas

Country State County
United States New York Dutchess

Commodities

Commodity Importance
Iron Primary

Comments on the commodity information

  • TOPO SHOWS WORKINGS AS POND 600 FEET LONG EAST-WEST, 400 FEET WIDE NORTH-SOUTH MORE THAN 150 FEET DEEP; PIT WALL SHOWS NUMEROUS FAULTS IN BOTH ORE ZONE AND UNDERLYING DOLOMITE; LARGEST FAULT STRIKE N-S, DIP VERTICAL; ORE ZONE STRIKE N 70 DEG. W, DIP ABOUT 45 DEG. N; ZINC AND MANGANESE PROBABLY PRESENT BUT NOT TESTED FOR.

Materials information

Materials Type of material
Limonite Ore
Biotite Gangue
Phlogopite Gangue
Tremolite Gangue

Alteration

  • (Local) Mass Weathering Of Small Fractured Blocks

Nearby scientific data

(1) -73.49732, 41.96999
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Major Overthrust Belt ; Reg.Trends: North-South
Type of structure Local
Structure description Faults

Ore body information

  • General form WEDGE
    Strike N 70 DEG. W
    Dip 45 DEG. NE
    Thickness 45.72M
    Length 182.88M
    Width 121.92M
    Depth to top 0M
    Depth to bottom 45.72M

Controls for ore emplacement

  • Probably Mass Weathering Of Iron Rich Dolomite Layers

Comments on the geologic information

  • MINE AT CONTACT OF DOLOMITE AND SLATE ; MAJOR.UNITS: DOLOMITES, SLATES, SCHIST ; GEOL.DESC: MINE NEAR CONTACT WITH MID ORDOVICIAN BERKSHIRE SCHIST AND NEAR OVERTHRUST OF LOW CAMBRIAN EVERETT SCHIST. ; REG.COM: THRUST AND FRACTURED BEDROCK

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1750
Discoverer C. S. Maltby
Year of first production 1750
Production years 1750 - 1885

Mining district

District name Eastern New York

Ownership information

  • Type Operator
    Owner Thomas Iron Co., Lehigh Valley, Pennsylvania
  • Type Owner
    Owner C. S. Maltby

Comments on the production information

  • PRODUCTION FIGURES LACKING; ESTIMATED 1,300,000 TONS OF ORE REMOVED

Comments on the reserve resource information

  • PROBABLY MODERATE AMOUNTS OF LOW GRADE ORE REMAINS
  • PROBABLY NEARLY ALL HIGH GRADE ORE MINED; PROBABLY MODERATE LOW GRADE ORE PRESENT; NO FIGURES AVAILABLE.
  • PROBABLY SOME LOW GRADE ORE POTENTIAL; NO FIGURES AVAILABLE.

Workings at the site

  • Type of workings Surface
    Area 2.103HA
    Overall length 182.88M
    Overall width 121.92M

Comments on the workings information

  • PIT FILLED WITH AT LEAST 100 FEET OF WATER

Comments on development

  • ECON.COM: EARLY MAJOR IRON AREA, 1734 TO 1900; FOUNDRIES USED FOREST CHARCOAL; ORE HAD HIGH MANGANESE AND LOW PHOSPHOROUS FOR HARD IRON; EASILY SEEN DEPOSITS MINED.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit PIT IN FRACTURE ZONE, AT LEAST 5 SMALL FAULTS PRESENT
Deposit USGS TOPO, 1956, "SHARON - CONN. - N.Y.", 1:24,000, SHOWN AS POND ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1972 D'Agostino, John P. U.S. Geological Survey

Beyond USGS

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

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