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Roxbury Iron Mine

Past Producer in Litchfield county in Connecticut, United States with commodities Iron, Copper, Lead, Silver
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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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10067422
MRDS ID W000169
Record type Site
Current site name Roxbury Iron Mine
Related records 10167712

Geographic coordinates

Geographic coordinates: -73.33854, 41.56799 (WGS84)

Site location context

Political divisions (FIPS codes)

Litchfield(county)

Connecticut(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Roxbury(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 Connecticut Litchfield

Commodities

Commodity Importance
Iron Primary
Copper Secondary
Lead Secondary
Silver Secondary

Comments on the commodity information

  • Prospected 1750 By Hurlbut and Hawley, Mined 1760 By Bronsons' Brothers, Sank Mine Shaft 175 Ft Deep, Ventilation Shaft Not So Deep, Both Parties Mined Sphalerite For Silver, Both Parties Went Bankrupt, Silver Is Reported. Three Other Parties Tried For Si
  • PROSPECTED 1750 BY HURLBUT AND HAWLEY, MINED 1760 BY BRONSONS' BROTHERS, SANK MINE SHAFT 175 FT DEEP, VENTILATION SHAFT NOT SO DEEP, BOTH PARTIES MINED SPHALERITE FOR SILVER, BOTH PARTIES WENT BANKRUPT, SILVER IS REPORTED. THREE OTHER PARTIES TRIED FOR SILVER BY OPEN PIT, ALL FAILED; LAST MINED FOR SIDERITE BUT METALLURGY TOO DIFFICULT. LAST OWNED BY DAVID J. STILES (1831) TWO PARALLEL VEIN QUARTZ WITH SIDERITE. FIRST VEIN 200 TO 300 FEET LONG PINCHES OUT INTO HILL SIDE; MAIN ORE VEIN WORKED ALONG STRIKE FOR 1500 FEET OR MORE BY TWO ADITS, WHICH STOPED BOTH VEINS THROUGH VERTICAL INTERVAL OF 50 TO 75 FEET. VEIN QUARTZ 2 TO 8 FEET WIDE, AVERAGES 3 TO 4 FEET WIDE. STRIKE OF VEIN QUARTZ N 60 DEG. WEST, DIP VERTICAL. VEINS MAY EXTEND FOR MORE THAN 2500 FEET.

Materials information

Materials Type of material
Arsenopyrite Ore
Galena Ore
Chalcopyrite Ore
Pyrite Ore
Sphalerite Ore
Siderite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Early Devonian
    Stratigraphic age (youngest) Early Devonian
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss

Nearby scientific data

(1) Rowe Schist
ListMap

Economic information

Comments on the geologic information

  • Geol.Desc: Wall Rock Foliation Strike East-West, Foliation Dip 10 Degrees North. Mine Hill Granite Gneiss Considered Syntectonic Intrusive Into Cambro-Ordovician Hartland Formation of Interlayered Micaquartzite and Schist.
  • GEOL.DESC: WALL ROCK FOLIATION STRIKE EAST-WEST, FOLIATION DIP 10 DEGREES NORTH. MINE HILL GRANITE GNEISS CONSIDERED SYNTECTONIC INTRUSIVE INTO CAMBRO-ORDOVICIAN HARTLAND FORMATION OF INTERLAYERED MICAQUARTZITE AND SCHIST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Production years 1760 TO ABOUT 1815

Mining district

District name Southeast Berkshire Highlands

Comments on the production information

  • SPHALERITE SPORADICALLY MINED FOR SILVER FOR 50 YEARS, NO SILVER PRODUCED; ABOUT 1815 SIDERITE MINED FOR IRON, NO IRON PRODUCED. ESTIMATED VEIN QUARTZ PRODUCTION ABOUT 50,000 TONS; NO FIGURES AVAILABLE; MUCH WASTE ROCK REMOVED FROM HILL SLOPE FOR OPEN PIT OPERATION.

Comments on the reserve resource information

  • NO FIGURES AVAILABLE; ESTIMATE LARGE TONNAGE OF VEIN QUARTZ WITH SULFIDES AND CARBONATE AVAILABLE.

Comments on development

  • TOTAL$: US

Reference information

Bibliographic references

  • Deposit

    CHUTE, N. E., 1943, "ROXBURY SIDERITE MINE", USGS, MEMORANDUM, UNPUBL., TEXT 2P

  • Production

    SHEPARD, 1831

  • Deposit

    Chute, N. E., 1943, "Roxbury Siderite Mine", Usgs, Memorandum, Unpubl., Text 2p.

  • Deposit

    Ryerson, K.H., 1968, Rock Hound'S Guide To Ct.: ( Pequot Handbook No. 3), The Pequot Press, Inc., Stonington, Ct., Pg. 32-33

  • Deposit

    Kauth, K.B., 1949, No. Jersey Society Visits Roxbury Sta., Conn: Rocks And Minerals, Vol. 24, No. 9-10, Pg. 482-485

  • Deposit

    Heermance, E.L., 1935, "The Connecticut Guide: Emergency Relief Commission," Hartford, Ct., Pg.111-112

  • Deposit

    Shepard, C.U., 1837, "A Report On The Geological Survey Of Ct.: By The Author For The State Of Ct.," New Haven, Ct., Pg. 30-32

  • Deposit

    Shepard, C.U., 1831, "Notice Of The Mine Of Spathic Iron (Steel Ore) Of New Milford And Of The Iron Works Of Salisbury In The State Of Ct.," American Journal Of Science, Vol. Xix, No. Ii, Pg. 311-322

  • Deposit

    Schairer, J.F., 1931, "Minerals Of Conn.", Conn. Geol. Survey, Bull. 51, Pg. 102-103

General comments

Subject category Comment text
Deposit Gates' Map Locates Mine By Symbol. USGS Topo, 1955, "Roxbury", 1:24,000, Mine Dump Shows As Topographic Expression On West Valley Bottom of Shepaug River. ; Info.Src : 1 Pub Lit
Deposit GATES' MAP LOCATES MINE BY SYMBOL. USGS TOPO, 1955, "ROXBURY", 1:24,000, MINE DUMP SHOWS AS TOPOGRAPHIC EXPRESSION ON WEST VALLEY BOTTOM OF SHEPAUG RIVER. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1972 Windolph, John F. U.S. Geological Survey
Editor 19-MAR-2003 Nicholson, S.W. U.S. Geological Survey Combined This Record With Information From Record W100460: Then Deleted Record W100460
Updater 20-AUG-1997 Mchone, Nancy Connecticut Geological and Natural History Survey Added Model_Num And Model: Noted Duplicate Record Number W100460
Reporter 01-NOV-1983 Whitlow, S. U.S. Geological Survey

Beyond USGS

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

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