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Stewart Sunk Magnetite Mine

Past Producer in Putnam county in New York, United States with commodities Iron, Titanium, Metal
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Host and associated rocks
  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 10067380
MRDS ID W000120
Record type Site
Current site name Stewart Sunk Magnetite Mine
Alternate or previous names Sunk Mine
Related records 10151171

Geographic coordinates

Geographic coordinates: -73.85039, 41.43666 (WGS84)
Elevation 256
Relative position 1.9 MILE NORTH OF OSCAWANA LAKE, 5.5 MILES EAST OF COLD SPRING

Site location context

Political divisions (FIPS codes)

Putnam(county)

New York(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Oscawana Lake(quadrangle 1:24,000 scale)

Bridgeport(quadrangle 1:100,000 scale)

Hartford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Hudson(hydrologic unit)

Lower Hudson(hydrologic accounting unit)

Lower Hudson-Long Island(hydrologic subregion)

Mid Atlantic(hydrologic region)

Geographic areas

Country State County
United States New York Putnam

Commodities

Commodity Importance
Iron Primary
Titanium, Metal Critical Tertiary

Comments on the commodity information

  • ORE BED EXPOSED SEVERAL THOUSAND FEET; WORKINGS 1,500 FEET ON STRIKE AND 300 FEET DEEP; 6 FOOT RICH ORE MIDDLE SECTION REMOVED. TOTAL WIDTH OF ORE BED ABOUT 20 FEET. 5 SHAFTS, SOME 250 TO 300 FEET DEEP; SEVERAL CROSS ADITS; 1,200 FEET OF DRIFTS; STRIKE N 40 DEG. E, DIP 60 DEG. TO 90 DEG. SE

Alteration

  • (Local) Metamorphism Of Rock Units

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Paragneiss
    Rock description Paragneiss
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -73.85039, 41.43666
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Faulted, Folded Uplands ; Reg.Trends: Northeast
Type of structure Local
Structure description Faulted Blocks

Ore body information

  • General form BLANKET
    Strike N 40 DEG. E
    Dip 90 DEG. NW
    Length 457.2M
    Width 3.66M
    Depth to top 0M
    Depth to bottom 91.44M

Controls for ore emplacement

  • Iron Rich Precambrian Bed

Comments on the geologic information

  • METAMORPHOSED BEDS WITH MAGNETITE ; MAJOR.UNITS: PARAGNEISSES AND PEGMATITES ; GEOL.DESC: HIGHLY METAMORPHIC AND FAULTED AREA; COMPLEX GEOLOGY, NUMEROUS THEORIES ; REG.COM: METAMORPHOSED, FOLDED, AND FAULTED UPLANDS

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1825
Discoverer Prospector
Production years 1880

Mining district

District name Southeast New York

Ownership information

  • Type Owner-Operator
    Owner Philadelphia And Reading Coal And Iron Co.

Comments on the production information

  • NON-BESSEMER ORE; LACKED RAIL TRANSPORT; PRODUCTION FIGURES NOT AVAILABLE, ESTIMATED PRODUCTION ABOUT 500,000 TONS OF HIGH GRADE ORE

Comments on the reserve resource information

  • NO FIGURES AVAILABLE, MUCH LOW GRADE ORE REMAINS, ESTIMATED IN EXCESS OF 3 MILLION TONS
  • NO FIGURES AVAILABLE; MOST LOW GRADE ORE NEVER MINED; VERY LARGE LOW GRADE ORE RESERVES
  • NO FIGURES AVAILABLE; VERY LARGE POTENTIAL LOW GRADE ORE RESOURCES FROM BOTH LENGTH AND DEPTH OF DEPOSITS

Workings at the site

  • Type of workings Underground
    Length 365.76M
    Overall depth 91.44M

Comments on development

  • ECON.COM: EARLY IRON DISTRICT 1734 - 1900, ORE USED LOCALLY, NO RAILROAD TO MINE; MINE STILL IN ORE BED WITH MINABLE RICH ORE BAND 6 TO 7 FEET WIDE IN 12 FOOT WIDE ORE ZONE. NO REASON FOR MINE STOPPAGE

Reference information

Bibliographic references

  • Deposit

    COLONY, R.J., 1921, "MAGNETITE DEPOSITS SE. NEW YORK", N.Y.S. MUSEUM BULL. 249-250, MAP, TEXT, PG 111, 112

  • Deposit

    NEWLAND, D.H., 1919, "MINERAL RESOURCES OF NEW YORK", N.Y.S. MUSEUM BULL. 223, TEXT, PG 122

  • Deposit

    SMOCK, J.C., 1889, "IRON MINES OF NEW YORK", N.Y.S. MUSEUM BULL. 7, MAP, TEXT, PG 20

  • Deposit

    1889 RECON N.Y. STATE GEOLOGICAL SURVEY

  • Deposit

    1919 RECON N.Y. STATE GEOLOGICAL SURVEY

  • Deposit

    1921 RECON N.Y. STATE GEOLOGICAL SURVEY

  • Production

    SMOCK, 1889; COLONY, 1921

  • Reserve-Resource

    SMOCK, 1889

General comments

Subject category Comment text
Deposit Discovery Year: EARLY 1800'S
Deposit ORE HORIZON TRACED FOR SEVERAL MILES; ORE BED CUT BY PEGMATITES
Deposit ON STRIKE WITH DENNY, PRATT, SACKETT, AND CANADA MINES, NO RAILROAD; OWNED BY PHILADELPHIA AND READING COAL AND IRON COMPANY ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1971 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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