Arute Field, New Britain, Hartford County, Connecticut, USAi
| Regional Level Types | |
|---|---|
| Arute Field | Construction Site |
| New Britain | City |
| Hartford County | County |
| Connecticut | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 41' 43'' North , 72° 45' 36'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Newington | 30,562 (2017) | 3.0km |
| New Britain | 72,808 (2017) | 4.1km |
| Farmington | 25,000 (2017) | 6.6km |
| Kensington | 8,459 (2017) | 6.7km |
| West Hartford | 63,268 (2017) | 7.6km |
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 |
|---|---|---|
| Bristol Gem & Mineral Club | Bristol, Connecticut | 16km |
| Lapidary and Mineral Society of Central Connecticut | Meriden, Connecticut | 18km |
| New Haven Mineral Club | New Haven, Connecticut | 45km |
| Connecticut Valley Mineral Club | Springfield, Massachusetts | 47km |
In late 1990 to early 1991, Arute Field, home to the Connecticut Blue Devils football team at the Central Connecticut State University, was under construction. The athletic fields were being leveled into bedrock. The East Berlin formation (shale) and the Hampden Basalt were exposed along with NNE trending fault veins. Numerous other NNE faults occur in the area, which are mineralized with quartz, dolomite, baryte, copper mineral, and hydrocarbon.
Gray (1982) provides a description of the nearby, similar Columbus Street vein that is relevant to the Arute Field locality, although not all the same minerals are reported for both localities:
Basalt bordering the vein is silicified and bleached to a light gray color. This type of alteration is typical of the N45°W [actually N45°E according to Hubert et al (1992)] faults in the New Britain area irrespective of the presence of the carbonate-quartz-barite veins.
Vein filling was accomplished initially by the deposition of quartz, calcite, and ferroan dolomite in open spaces along the active fault zone. Movement continued throughout this phase frequently brecciating previously deposited vein material. After faulting ceased barite which occurs in plumose crystal groups up to 20 cm long, filled the open space in the center of the vein and cemented the carbonate-quartz breccias. The ferroan dolomite of the carbonate zone is oxidized to a dark red-brown color at the boundary of the barite zone. Cavities between barite crystals are filled by small amounts of drusy quartz, ferroan dolomite, and aragonite.
Sphalerite, chalcopyrite, galena, and minor amounts of barite, chalcocite, covellite, and tennantite fill open spaces and replace carbonates within the quartz-carbonate zones. Sphalerite was the first sulfide deposited. Galena and chalcopyrite followed later.
Vitreous black carbonaceous spheres, 1 to 5 mm in diameter, occur throughout the vein but are most abundant along the boundary of the quartz-carbonate and barite zones. Presumably these spheres were droplets of oil suspended in the hydrothermal fluids which became accidentally trapped during the deposition of the vein minerals.
Vein filling was accomplished initially by the deposition of quartz, calcite, and ferroan dolomite in open spaces along the active fault zone. Movement continued throughout this phase frequently brecciating previously deposited vein material. After faulting ceased barite which occurs in plumose crystal groups up to 20 cm long, filled the open space in the center of the vein and cemented the carbonate-quartz breccias. The ferroan dolomite of the carbonate zone is oxidized to a dark red-brown color at the boundary of the barite zone. Cavities between barite crystals are filled by small amounts of drusy quartz, ferroan dolomite, and aragonite.
Sphalerite, chalcopyrite, galena, and minor amounts of barite, chalcocite, covellite, and tennantite fill open spaces and replace carbonates within the quartz-carbonate zones. Sphalerite was the first sulfide deposited. Galena and chalcopyrite followed later.
Vitreous black carbonaceous spheres, 1 to 5 mm in diameter, occur throughout the vein but are most abundant along the boundary of the quartz-carbonate and barite zones. Presumably these spheres were droplets of oil suspended in the hydrothermal fluids which became accidentally trapped during the deposition of the vein minerals.
Hubert et al (1992) and Scovil (2008) provide additional descriptions of similar vein sites nearby. Hubert gives an age of 180 million years ago for the mineralization.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Anhydrite Formula: CaSO4 Habit: thin, rectangular, tabular Colour: colorless to pale blue/gray if not dissolved Description: As thin, rectangular, tabular molds, voids or flat surfaces in other minerals, such as quartz or prehnite, where this common, early-crystallizing mineral in vesicles in basalt later naturally dissolved away. In rare cases, extant crystals are know from other nearby localities with the same geologic history and mineral paragensis. References: Ken Gliesman collectionIdentified by Harold Moritz: Inferred (explain how) |
| ✪ Aragonite Formula: CaCO3 Habit: acicular Colour: colorless to white Description: masses of acicular crystals to a couple cm found in vugs along faults, usually with goethite surrounded by very altered earlier mineralization. References: |
| ⓘ Azurite Formula: Cu3(CO3)2(OH)2 References: |
| ✪ Baryte Formula: BaSO4 Habit: tabular Colour: white Description: In fault veins as massive to tabular crystals, singly in small vugs or in slightly radiating aggregates reaching 15 cm or more. References: |
| ⓘ Calcite Formula: CaCO3 References: |
| ⓘ Chalcopyrite Formula: CuFeS2 Habit: massive Colour: brassy, iridescent Description: massive, typically coated with secondary copper minerals References: |
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 Habit: massive encrustations on chalcopyrite Colour: pale blue References: |
| ⓘ Dolomite Formula: CaMg(CO3)2 Habit: curved rhombohedral Colour: tan Description: grades into browner ferroan dolomite, surfaces commonly etched References: |
| ⓘ Dolomite var. Iron-bearing Dolomite Formula: Ca(Mg,Fe)(CO3)2 Habit: curved rhombohedra Colour: brown Description: grades into tan normal dolomite, surfaces commonly etched References: |
| ⓘ Goethite Formula: Fe3+O(OH) Habit: massive Colour: brown to red-brown Description: earthy, commonly replacing sulfides and coating other minerals References: |
| ⓘ 'Limonite' References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 Habit: massive Colour: green Description: usually coating chalcopyrite References: |
| ✪ 'Petroleum var. Bitumen' Habit: amorphous Colour: black Description: amorphous, vitreous masses with conchoidal fracture References: |
| ✪ Quartz Formula: SiO2 Habit: short trigonal prismatic Colour: colorless to milky Description: Herkimer-style crystals to 2-3 cm in voids between baryte blades, or as drusy coatings on altered basalt References: |
| ✪ Siderite Formula: FeCO3 Habit: rhombohedra Colour: very dark brown Description: usually in groups coating drusy quartz on altered basalt matrix, possibly pseudomorphed by goethite. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| ⓘ | var. Iron-bearing Dolomite | 5.AB.10 | Ca(Mg,Fe)(CO3)2 |
| ⓘ | Aragonite | 5.AB.15 | CaCO3 |
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Anhydrite | 7.AD.30 | CaSO4 |
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
| Group 9 - Silicates | |||
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
| ⓘ | 'Petroleum var. Bitumen' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Aragonite | CaCO3 |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | ⓘ Siderite | FeCO3 |
| C | ⓘ Dolomite var. Iron-bearing Dolomite | Ca(Mg,Fe)(CO3)2 |
| O | Oxygen | |
| O | ⓘ Anhydrite | CaSO4 |
| O | ⓘ Aragonite | CaCO3 |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Dolomite var. Iron-bearing Dolomite | Ca(Mg,Fe)(CO3)2 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | ⓘ Dolomite var. Iron-bearing Dolomite | Ca(Mg,Fe)(CO3)2 |
| Al | Aluminium | |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Anhydrite | CaSO4 |
| S | ⓘ Baryte | BaSO4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| Ca | Calcium | |
| Ca | ⓘ Anhydrite | CaSO4 |
| Ca | ⓘ Aragonite | CaCO3 |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Dolomite var. Iron-bearing Dolomite | Ca(Mg,Fe)(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Siderite | FeCO3 |
| Fe | ⓘ Dolomite var. Iron-bearing Dolomite | Ca(Mg,Fe)(CO3)2 |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ganderia DomainDomain
- GranderiaPassive Margin
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Arute Field, New Britain, Hartford County, Connecticut, USA