Jinny Hill Barite Mine
Cheshire, Connecticut
41.4810°N 72.8882°W
Mine Overview
The Jinny Hill Barite Mine is near Cheshire, Connecticut. Historically the site has been part of the Cheshire Mining District. The site was first discovered in 1813 by Professor Benjamin Silliman. The Jinny Hill Barite Mine was closed at the time of data entry with no known plans to re-open. Mine operations consist of surface and underground workings. There is one known shaft. Subsurface depth reaches a maximum of 183 meters (600 feet) and extends 1,158 meters (3,800 feet) in length. The ore mined is composed of chalcopyrite, stilpnomelane and malachite. The ore body is linear in form reaching 1,158 meters (3,800 feet) long, 3 meters (9 feet) wide, and 182 meters (600 feet) thick. Associated rock in this area is mafic intrusive rock from the Upper Triassic epoch 237.00 to 201.30 million years ago. The New England Upland Section of the Appalachian Highlands characterize the geomorphology of the surrounding area.
Site identification and general characteristics. Learn about USGS mines.
Jinny Hill Barite Mine Near Cheshire, Connecticut
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Owner Name and Address
Stamford Manufacturing Company
- Type
- Operator
Commodities
Additional textual information about a site or mine.
- Commodity Type Importance
- Barium-Barite Non-Metallic Primary
- Copper Metallic Primary
- Silver Metallic Tertiary
- Sulfur Non-Metallic Tertiary
Deposit
MINERALIZATION EXTENDS MORE THAN 3800 FEET BUT AS NARROW VEIN; TOTAL DEPTH UNKNOWN.
FRITTS'S GEOLOGIC 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.; INFORMATION SOURCE: 1 PUB LIT.
Location Info
- New Haven , Connecticut County / State
- Continent Country State County
- North America The United States Connecticut New Haven
Development
FRITTS HAS COMPREHENSIVE REPORT ON HISTORY OF JINNY HILL MINE.; TOTAL$: US; 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.
Workings
Workings at the site.
Workings #1
- Type: Surface and Underground
- Surface Area: 0.1 Hectares
- Surface Length: 1158.24 Meters
- Surface Width: 0.91 Meters
- Sub Surface Length: 1158.24 Meters
- Sub Surface Depth: 182.88 Meters
Workings
OPERATIONS CEASED BECAUSE OF NARROWING OF VEIN. MINED VOLUME REPORTED AS 1, 660, 000 CUBIC FEET.
Concentration Process
Processes that concentrated or enriched the mineralization of the mine.
- Concentration Process
- Breccia Fill And Replacement
Geology
MINOR SULFIDES PRESENT IN AND ADJACENT TO BARITE VEIN; MAFIC INTRUSIVES, ARKOSE SEDIMENTS, SCHIST, BRECCIA; 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.; BARITE VEIN OCCUPIES BRECCIA ZONE IN ARKOSE BEDS; NOT KNOWN TO BE IN CONTACT WITH MAFIC INTRUSIVE.
Orebody
Characteristics of the ore body.
- Length:
- Width: 3.00 meters (9.84 feet)
- Bottom Depth: 182.88 meters (600.00 feet)
- Thickness: 182.88 meters (600.00 feet)
- Strike: north 35 degrees east
- Dip: 70 to 75 degrees west
Rocks
Geological materials at the site.
- Class? 1st Order Name? 2nd Order Name? 3rd Order Name? 4th Order Name? Most Specific Name? Begin Time End Time Description?
- Associated Rock West Rock Diabase, Intrudes New Haven Arkose Plutonic Rock Mafic Intrusive Rock - Mafic Intrusive Rock Upper Triassic Upper Triassic -
- Host Rock Southington Mountain Schist, Banded Argillaceous, Sileceons, Minor Calcareous Rock Sedimentary Rock Clastic Sedimentary Rock Arkose Arkose - - -
Structure
Geologic structural features affecting or characterizing the site or mine.
- Scale Description
- Local Minor Parallel Breccia Zones Discordant To Major Faults In Area
- Regional Faulted Western Trough Of Conn- Triassic Basin; Reg-Trends: North-South
Physiography
Physiographic area where the resource is found.
- Division Province? Section
- Appalachian Highlands New England Province New England Upland Section
Ore Control
Controls on emplacement of ore such as faults or other structural features.
- Text?
- Nearly East-West Trending Breccia Zones In Area Of Mafic Intrusives
Reserve-resource
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.
Nearby Deposits
Other deposits in the same region.
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Gaylord Copper Prospect
- Copper commodity Site type Mine status
- New Haven, Connecticut
- Void Filling And Replacement
- 0.78 miles
-
Bellamy-Copper Valley Mine
- Copper commodity Site type Mine status
- New Haven, Connecticut
- Void Filling And Replacement
- Surface And Underground
- 1.15 miles
-
Cross-Rock Copper Mine
- Copper commodity Site type Mine status
- New Haven, Connecticut
- Void Filling And Replacement
- Surface
- 1.37 miles
-
Copper Valley Mine
- Copper commodity Site type Mine status
- New Haven, Connecticut
- Underground
- 1.51 miles
-
Tallmans Copper Mine
- Copper commodity Site type Mine status
- New Haven, Connecticut
- Void Filling And Replacement
- Underground
- 2.58 miles
-
Cheshire Barytes Company Mine
- Barium-Barite commodity Site type Mine status
- New Haven, Connecticut
- 2.89 miles
-
Townsend Property
- Copper commodity Site type Occurrence status
- New Haven, Connecticut
- Void Filling And Replacement
- 3.01 miles
-
Unnamed Copper Prospect
- Copper commodity Site type Occurrence status
- New Haven, Connecticut
- Void Filling And Replacement
- 4.28 miles
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Golden Parlour Copper Mine
- Copper commodity Site type Mine status
- New Haven, Connecticut
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- 4.45 miles
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New Haven Mineral Company Barite Mine
- Barium-Barite commodity Site type Mine status
- New Haven, Connecticut
- 4.79 miles
Nearby Places
- Cheshire (1.40 miles away)
- Wallingford (3.60 miles away)
- Prospect (4.71 miles away)
- Meriden (5.47 miles away)
- Hamden (5.73 miles away)
- North Haven (6.32 miles away)
- Bethany (6.67 miles away)
- Southington (7.82 miles away)
- Naugatuck (8.16 miles away)
- Beacon Falls (9.12 miles away)
- Middlefield (9.17 miles away)
- Wolcott (9.80 miles away)
- Waterbury (9.85 miles away)
- Durham (10.46 miles away)
- Woodbridge (10.57 miles away)
- Seymour (11.03 miles away)
- Berlin (11.91 miles away)
- New Haven (11.93 miles away)
- Oxford (11.98 miles away)
- Kensington (12.06 miles away)
- North Branford (12.31 miles away)
- Middlebury (12.59 miles away)
- Oakville (12.70 miles away)
- Middletown (13.22 miles away)
Nearby Mining Districts
- Cheshire Mining District (0 miles away)
- Meriden Mining District (2.94 miles away)
- Woodbridge Mining District (6.23 miles away)
Footnotes
* Mine bounds on map indicate the general area that a mine occupies. For an detailed map, refer to the overseeing BLM field office.
** The mine central point is based on an average of the mine's bounding box(es) and does not necessarily fall on the claim itself.
1 World-class significance is determined by total endowment of the contained commodity. This includes all past production and remaining reserves. Each commodity is considered separately and commodities cannot be combined to arrive at a significant size. The tonnage thresholds are from the mine model grade-tonnage studies. As of June 2008, many entries were classified as significant under less strict rules.
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Notes
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.