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Sylvan Lake 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 10067397
MRDS ID W000143
Record type Site
Current site name Sylvan Lake Limonite Mine

Geographic coordinates

Geographic coordinates: -73.74261, 41.6036 (WGS84)
Elevation 101
Relative position 0.5 MILE WSW OF SYLVAN LAKE

Site location context

Political divisions (FIPS codes)

Dutchess(county)

New York(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Poughquag(quadrangle 1:24,000 scale)

Waterbury(quadrangle 1:100,000 scale)

Hartford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Hudson-Wappinger(hydrologic unit)

Upper Hudson(hydrologic accounting unit)

Upper Hudson(hydrologic subregion)

Mid Atlantic(hydrologic region)

Geographic areas

Country State County
United States New York Dutchess

Commodities

Commodity Importance
Iron Primary

Comments on the commodity information

  • PIT IS NORTHERN PART OF POND; THE SOUTHERN TWO-THIRDS OF POND BEING THE PIT OF THE LARGER TOWER FISHKILL LIMONITE MINE (HARTFORD 2 DEG. SHEET, NO. 32). SYLVAN LAKE POND ON TOPO SHEET EXTENDS DUE NORTH; LENGTH 500 FEET, WIDTH 250 FEET, ABOUT 90 FEET DEEP. PROBABLY MANGANESE AND ZINC PRESENT BUT NOT STUDIED OR TESTED.

Materials information

Materials Type of material
Limonite Ore

Alteration

  • (Local) Mass Weathering Of Bedrock

Nearby scientific data

(1) -73.74261, 41.6036
ListMap

Economic information

Geologic structures

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

Ore body information

  • General form TABULAR
    Strike NORTH
    Dip NORTH
    Thickness 18.29M
    Length 152.4M
    Width 76.2M
    Depth to top 9.14M
    Depth to bottom 27.43M

Controls for ore emplacement

  • Probably Mass Weathering Of Siderite Rich Carbonate Layers, Though None Reported

Comments on the geologic information

  • BEDROCK NOT ENCOUNTERED ; MAJOR.UNITS: CARBONATE ; GEOL.DESC: DEEPLY WEATHERED FAULT ZONE ; REG.COM: DEEP MASS WEATHERING OF FRACTURE ZONE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1825
Discoverer Prospector
Production years 1882

Mining district

District name Eastern New York

Ownership information

  • Type Owner-Operator
    Owner Clove Iron Works

Comments on the production information

  • DRAINAGE OF PIT DIFFICULT OWING TO LARGE INFLOW; HAND-PICKED ORE, PRODUCTION FIGURES NOT GIVEN; ESTIMATED 300,000 TONS OF ORE MINED

Comments on the reserve resource information

  • NO FIGURES AVAILABLE, PROBABLY MODERATE LOW GRADE ORE RESERVES
  • NO FIGURES AVAILABLE, PROBABLY MODERATE LOW GRADE ORE RESOURCES
  • PROBABLY LOW GRADE ORE REMAINS, DRAINAGE A PROBLEM

Workings at the site

  • Type of workings Surface
    Area 1.095HA
    Overall length 152.4M
    Overall width 76.2M

Comments on the workings information

  • MINING SERIOUSLY HAMPERED BY WATER INFLOW

Comments on development

  • ECON.COM: EARLY IRON PRODUCING DISTRICT, 1734 - 1900; LOCAL IRON MARKET

Reference information

Bibliographic references

  • Deposit

    SMOCK, J.C., 1889, "IRON MINES OF NEW YORK", N.Y.S. MUSEUM BULL. 7, MAP, TEXT, PG 53

  • Deposit

    1889 RECON NEW YORK STATE GEOLOGICAL SURVE

  • Production

    SMOCK, 1898

General comments

Subject category Comment text
Deposit DUE NORTH EXTENSION OF TOWER FISHKILL MINE PIT. THE THICKNESS OF THE DEPOSIT RANGES FROM 50-60 FT.
Deposit USGS TOPO, 1960, "POUGHQUAG", 1:24,000, MAP SYMBOL AS POND. LIMONITE ORE ON SURFACE AND OVERLAIN BY AS MUCH AS 30 FEET OF GLACIAL DRIFT; BEDROCK NOT ENCOUNTERED ; INFO.SRC : 1 PUB LIT
Deposit Discovery Year: EARLY 1800'S

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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