Jinny Hill Mine (Cheshire Barite Mine), Cheshire, New Haven County, Connecticut, USAi
| Regional Level Types | |
|---|---|
| Jinny Hill Mine (Cheshire Barite Mine) | Group of Mines |
| Cheshire | Town |
| New Haven County | County |
| Connecticut | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 28' 40'' North , 72° 53' 20'' West
Latitude & Longitude (decimal):
Type:
Group of Mines
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Cheshire | 29,443 (2017) | 2.6km |
| Cheshire Village | 5,786 (2017) | 2.9km |
| Wallingford | 17,712 (2017) | 5.9km |
| Wallingford Center | 18,209 (2017) | 6.6km |
| Prospect | 9,476 (2017) | 8.0km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Lapidary and Mineral Society of Central Connecticut | Meriden, Connecticut | 10km |
| New Haven Mineral Club | New Haven, Connecticut | 19km |
| Bristol Gem & Mineral Club | Bristol, Connecticut | 22km |
| Danbury Mineralogical Society | Danbury, Connecticut | 48km |
Baryte mines on three parallel, roughly E-W oriented fault brecciated veins in Triassic New Haven arkose located on Jinny Hill about 1½ miles SE of Cheshire center. The mine, which was the first baryte mine in North America, was operated between 1838 and 1878 and produced about 160,000 tons of baryte ore (Fritts, 1961). The main vein extends for about 3/4 of a mile and is about a meter thick. The mine is at least 400 feet deep with 4 miles of tunnels. The baryte was used in paint manufacturing.
Fritts (1962) also says that the central vein was by far the richest of all the Cheshire deposits, including the much smaller mines in other parts of the town. Essentially all the best historic specimens came from this vein. The area is now covered with residential private property. Coordinates are for the approximate center of the central vein.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
15 valid minerals.
Detailed Mineral List:
| ⓘ Allophane Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| ⓘ Azurite Formula: Cu3(CO3)2(OH)2 |
| ✪ Baryte Formula: BaSO4 Description: Mostly massive to subhedral material, but good euhedral crystals can reach 1 dm and subparallel clusters can reach a meter. Large crystals tend to have transparent sections, smaller crystals translucent to opaque. Associated with drusy quartz, small isolated botryoidal malachite blebs or acicular sprays, rarer with blebs of copper sulfides, all on pinkish-red arkosic sandstone to conglomerate matrix. A partial, reddish coating may be present on many crystals. References: |
| ⓘ Bornite Formula: Cu5FeS4 References: |
| ⓘ Calcite Formula: CaCO3 References: |
| ⓘ Cerussite Formula: PbCO3 Habit: tabular with curved edges, intersecting twins Colour: white Description: Micro crystals encrusting tiny galena cubes with malachite, commonly twinned. References: |
| ⓘ Chalcocite Formula: Cu2S References: |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ Cuprite Formula: Cu2O Description: Thin secondary crusts associated with bornite and/or chalcocite. Easily confused with hematite. |
| ⓘ Fluorite Formula: CaF2 Habit: cubic Colour: colorless, purple tints on edges Fluorescence: blue Description: A couple of dozen or so cubic crystals about 7 mm on an edge occur in a pocket in massive quartz and barite with tiny galena cubes encrusted with malachite and cerussite. Some malachite underneath the fluorite crystals imparts a false greenish tinge to them. References: |
| ⓘ Galena Formula: PbS Habit: cubic Colour: gray Description: Isolated cubes to 1 cm in massive quartz with scattered malachite and tiny cubes associated with fluorite. References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 Description: Isolated sub-cm blebs, sprays and masses common and rather characteristic of Cheshire specimens. References: |
| ⓘ Native Copper Formula: Cu Description: A few micro crystals nestled between barite slabs are known. References: |
| ⓘ Quartz Formula: SiO2 Description: Barite, associates with massive quartz, grading to drusy crystals in pockets, with scattered malachite is characteristic of Cheshire specimens. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Cerussite | 5.AB.15 | PbCO3 |
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
| Group 9 - Silicates | |||
| ⓘ | Allophane | 9.ED.20 | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Cerussite | PbCO3 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Cerussite | PbCO3 |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Al | Aluminium | |
| Al | ⓘ Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | ⓘ Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Baryte | BaSO4 |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Galena | PbS |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| Pb | Lead | |
| Pb | ⓘ Cerussite | PbCO3 |
| Pb | ⓘ Galena | PbS |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ganderia DomainDomain
- GranderiaPassive Margin
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Jinny Hill Mine, Cheshire, New Haven County, Connecticut, USA