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Jinny Hill Barite Mine

Past Producer in New Haven county in Connecticut, United States with commodities Barium-Barite, Copper, Sulfur, 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. 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 10067489
MRDS ID W000264
Record type Site
Current site name Jinny Hill Barite Mine
Related records 10143552

Geographic coordinates

Geographic coordinates: -72.89314, 41.47888 (WGS84)
Relative position 1.5 MILE SSE FROM CHESHIRE

Site location context

Political divisions (FIPS codes)

New Haven(county)

Connecticut(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Carmel(quadrangle 1:24,000 scale)

New Haven(quadrangle 1:100,000 scale)

Hartford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Quinnipiac(hydrologic unit)

Connecticut Coastal(hydrologic accounting unit)

Connecticut Coastal(hydrologic subregion)

New England(hydrologic region)

Geographic areas

Country State County
United States Connecticut New Haven

Commodities

Commodity Importance
Barium-Barite Critical Primary
Copper Tertiary
Sulfur Tertiary
Silver Tertiary

Comments on the commodity information

  • MAIN CENTRAL VEIN 3800 FEET LONG, 3 FEET WIDE; 3 SHAFTS, MANY PROSPECTS, MINED ENTIRE LENGTH, IN PLACES TO DEPTH 600 FEET. STRIKE OF VEIN N 75 TO 85 DEG. EAST, DIP NEAR VERTICAL. NORTH VEIN 600 TO 1000 FEET NORTH OF MAIN CENTRAL VEIN, 2000 FEET LONG, INCHES TO SEVERAL FEET LONG, LITTLE MINED, WITH ONE ADIT, 7 LARGE PROSPECTS, WITH STRIKE N 35 DEG. EAST, DIP 70 TO 75 DEG. WEST. SMALLEST SOUTH VEIN, 500 FEET SOUTH OF MAIN CENTRAL VEIN, IS 500 FEET LONG, INCHES TO LESS THAN 3 FEET WIDE, WITH SEVERAL PROSPECTS, WAS NOT MINED.

Materials information

Materials Type of material
Barite Ore
Bornite Ore
Calcite Ore
Chalcocite Ore
Chalcopyrite Ore
Chrysocolla Ore
Cuprite Ore
Hematite Ore
Malachite Ore
Stilpnomelane Ore

Analytical data

Result SAMPLE SHOW AG 300 PPM, B 50 PPM, BI 30 PPM, CU G20000 PPM, PB 50 PPM, SR 65000 PPM, ZN N PPM, BA 65000 PPM.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
    Rock unit name West Rock Diabase, Intrudes New Haven Arkose
    Rock description West Rock Diabase, Intrudes New Haven Arkose
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Arkose
    Rock unit name Southington Mtn. Schist, Banded Argillaceous, Sileceons, Minor Calcareous Rock
    Rock description Southington Mtn. Schist, Banded Argillaceous, Sileceons, Minor Calcareous Rock

Nearby scientific data

(1) -72.89314, 41.47888
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Faulted Western Trough Of Conn. Triassic Basin ; Reg.Trends: North-South
Type of structure Local
Structure description Minor Parallel Breccia Zones Discordant To Major Faults In Area.

Ore body information

  • General form LINEAR
    Strike N 35 DEG. E.
    Dip 70 TO 75 DEG. W.
    Thickness 182.88M
    Length 1158.24M
    Width 3M
    Depth to bottom 182.88M

Controls for ore emplacement

  • Nearly East-West Trending Breccia Zones In Area Of Mafic Intrusives

Comments on the geologic information

  • MINOR SULFIDES PRESENT IN AND ADJACENT TO BARITE VEIN ; MAJOR.UNITS: MAFIC INTRUSIVES, ARKOSE SEDIMENTS, SCHIST, BRECCIA ; GEOL.DESC: CLOSEST KNOWN INTRUSIVES, ABOUT 1600 FEET SOUTH AND EAST OF MINERALIZED ZONE, ARE THIN DIABASE DIKES. SOUTH IS THE UPPER TRIASSIC WEST ROCK DIABASE, EAST IS THE UPPER TRIASSIC OR YOUNGER BUTRESS DIABASE. AREA UNDERLAIN BY SILURIAN AND DEVONIAN WEPAWAUG SCHIST OF BANDED ARGILLACEOUS, SILICEOUS, AND MINOR PYRITIC CALCAREOUS ROCKS, OR OLDER SHCISTS. ; REG.COM: BARITE VEIN OCCUPIES BRECCIA ZONE IN ARKOSE BEDS; NOT KNOWN TO BE IN CONTACT WITH MAFIC INTRUSIVE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Significant No
Discovery year 1813
Discoverer Professor Benjamin Silliman
Year of first production 1838

Mining district

District name Cheshire

Ownership information

  • Type Operator
    Owner Stamford Manufacturing Co.
    First year 1877

Comments on the production information

  • BARITE USED FOR PAINT FILLER. HAD FOUR DIFFERENT OWNERS ASSAYED SAMPLES FROM HEAVY METALS PROGRAM, ASSAYED DUMP GRAB SAMPLES SHOW HIGH VALUES OF AG 300 PPM, B 50 PPM, BI 30 PPM, CU G20000 PPM, PB 50 PPM, SR G5000 PPM, ZN N PPM, BA G5000PPM.

Comments on the reserve resource information

  • NO FIGURES AVAILABLE, BUT MINING STOPPED OWING TO NARROWING OF BARITE VEIN; MODERATE QUANTITIES OF BARITE STILL PRESENT AS LOW GRADE ORE.
  • FIGURES LACKING BUT ORE VEIN STILL PRESENT BUT MUCH NARROWER.
  • FIGURES LACKING BUT PROBABLY MODERATE AMOUNTS OF LOW-GRADE ORE AVAILABLE FROM REMNANT NARROW VEIN.

Workings at the site

  • Type of workings Surface/Underground
    Area 0.1HA
    Length 1158.24M
    Overall depth 182.88M
    Overall length 1158.24M
    Overall width 0.91M

Comments on the workings information

  • OPERATIONS CEASED BECAUSE OF NARROWING OF VEIN. MINED VOLUME REPORTED AS 1,660,000 CUBIC FEET.

Comments on development

  • FRITTS HAS COMPREHENSIVE REPORT ON HISTORY OF JINNY HILL MINE. ; TOTAL$: US ; ECON.COM: USED AS LOW COST ADULTERANT IN WHITE LEAD PAINT FROM 1838 TO 1877. MINE OPERATIONS CEASED BECAUSE NARROWING OF ORE VEIN, LOW COST OF IMPORTED ORE, AND DISCOVERY OF SOUTHERN AND WESTERN U.S. DEPOSITS.

Reference information

Bibliographic references

  • Deposit

    FRITTS, C. E., 1963, "GEOL. OF MOUNT CARMEL QUAD.", USGS, GQ-199, SHORT TEXT

  • Deposit

    FRITTS, C.E., 1962, BARITE MINES OF CHESHIRE.

  • Deposit

    1866 GEOLMAP HERMANN CREDNER, SCHOLASTI

  • Production

    FRITTS, 1962

General comments

Subject category Comment text
Deposit MINERALIZATION EXTENDS MORE THAN 3800 FEET BUT AS NARROW VEIN; TOTAL DEPTH UNKNOWN
Deposit FRITTS'S GEOL. MAP AT 1:24,000 LOCATES BARITE VEINS AND MINES BY SYMBOLS. JINNY HILL ASSAY SAMPLES, "USGS LAB FILES", SAMPLE NOS. ABO 697, ABO 851, ABO 855 IN 67-WS-88 REPORT; SAMPLE NOS CHESHIRE 4 THROUGH 9 IN 69-WG-16 REPORT; SAMPLE NO. ACN 872 IN 68-WS-87 REPORT; SAMPLE NOS. BCT 176 THROUGH 185, AND 187, IN HM 3336. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1972 Windolph, John F. U.S. Geological Survey

Beyond USGS

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

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