Hale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USAi
| Regional Level Types | |
|---|---|
| Hale-Walker prospects | Group of Prospects (Abandoned) |
| Collins Hill | Hill |
| Portland | - not defined - |
| Middlesex County | County |
| Connecticut | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 35' 7'' North , 72° 35' 17'' West
Latitude & Longitude (decimal):
Type:
Group of Prospects (Abandoned) - last checked 2018
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Portland | 5,862 (2017) | 4.6km |
| Cromwell | 13,750 (2017) | 4.9km |
| Middletown | 46,756 (2017) | 5.8km |
| Lake Pocotopaug | 3,436 (2017) | 6.6km |
| East Hampton | 2,691 (2017) | 7.2km |
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 | 19km |
| Bristol Gem & Mineral Club | Bristol, Connecticut | 32km |
| New Haven Mineral Club | New Haven, Connecticut | 42km |
Two small prospects in narrow granitic pegmatite dike best known for its aquamarine. Minerals such as good epidote in quartz veins from the surrounding metamorphics are also included. According to Cameron et al (1954):
The pegmatite...crops out on land owned jointly by Charles F. Walker, R. F. D., Portland, and Harry L. Walker, R. F. D., Glastonbury. It may extend eastward beneath overburden to land owned by Clifford Hale, R. F. D., Portland. In 1932 two small cuts were opened on the Walker property by the Eureka Flint & Spar Co., Portland, and were worked for 3 or 4 months for feldspar. According to Mr. William Wilkes, superintendent, about 70 tons of no. 1 feldspar was recovered. Both quarries have since been idle. The upper opencut is 25 feet long, 9 feet wide, and 1 to 10 feet deep. The lower opencut is 38 feet long, 10 feet wide, and 5 to 18 feet deep. Both pits are free of water and probably contain little backfill. The prospect was mapped by E. N. Cameron and V. E. Shainin in May 1943.
The pegmatite is a tabular body at least 180 feet long and 6 to 8 feet thick. It ranges in strike from N. 79° W. to east and dips 63° to 74° SW. The dike is sharply discordant to the enclosing granite-gneiss (Monson gneiss), whose foliation strikes N. 20° W. and dips westward at moderate to steep angles. The contact between the Monson gneiss and the Bolton schist lies 60 feet west of the westernmost exposure of the pegmatite. The pegmatite does not seem to extend across the contact.
The dike, a disseminated type of beryl deposit, consists chiefly of quartz and perthite. It has a border zone and a core. The border zone is ½ to 1 inch thick and is composed of fine-grained quartz, plagioclase and tourmaline. The core consists of medium- to coarse-grained quartz and perthite with subordinate amounts of plagioclase, muscovite, and accessory beryl, tourmaline, columbite-tantalite and monazite. Monazite is rare.
Most of the beryl occurs in the core, either with small anhedral crystals of perthite scattered in a matrix of coarse quartz, plagioclase and accessory tourmaline, or with fine-grained quartz, plagioclase, and accessory tourmaline.
The beryl is green to blue-green and occurs in crystals 0.2 to 2 inches long and 0.1 to 2 inches in diameter, but most of the crystals are very small.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Albite Formula: Na(AlSi3O8) Colour: white to tan |
| ⓘ Albite var. Peristerite Formula: Na(AlSi3O8) |
| ⓘ 'Allanite Group' ? Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) Description: Reference contains a list with no details. |
| ⓘ Almandine Formula: Fe2+3Al2(SiO4)3 Habit: trapezohedral Colour: red Description: in sugary albite |
| ⓘ Annite Formula: KFe2+3(AlSi3O10)(OH)2 Colour: black Description: fka biotite |
| ✪ Beryl Formula: Be3Al2(Si6O18) Habit: elongated hexagonal prisms Colour: yellow, green, blue-green Description: crystals to 10 inches References: Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255 |
| ⓘ Beryl var. Aquamarine Formula: Be3Al2Si6O18 Habit: hexagonal prisms Colour: blue Description: crystals to 10 inches |
| ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series' Habit: thin prisms Colour: black Description: very small |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) Habit: elongated to short prisms Colour: dark green Description: In quartz veins in the metamorphics surrounding the pegmatites. |
| ⓘ Fluorapatite Formula: Ca5(PO4)3F Habit: prismatic Colour: white, yellow-green, green Fluorescence: yellow Description: Large crystals and casts are visible in the pegmatite. Some are parallel growth clusters, ranging in color from white to light yellow-green. Chunks of these are littered everywhere in the dump. Some are up to 7 in in diameter. |
| ⓘ Hematite ? Formula: Fe2O3 Description: Reference contains only a list with no details. |
| ⓘ 'Hornblende Root Name Group' Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2 |
| ⓘ 'Limonite' |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 Habit: octahedral Colour: black Description: The crystals are striated with triangular markings on the octahedron faces. The magnetite at Hale-Walker Quarry has a metallic luster on the crystal faces. The broken crystal portions are a very iridescent blue-black (Albini 1979) |
| ⓘ Formula: Cu2(CO3)(OH)2 Description: Reference contains only a list with no details. |
| ⓘ Meta-autunite Formula: Ca(UO2)2(PO4)2 · 6H2O References: |
| ⓘ Metatorbernite Formula: Cu(UO2)2(PO4)2 · 8H2O References: |
| ⓘ Microcline Formula: K(AlSi3O8) Colour: white, tan, pink Fluorescence: Some microcline shows moderately bright reddish to magenta fluorescence under SW UV light. |
| ⓘ 'Microlite Group' ? Formula: A2-mTa2X6-wZ-n Description: Reference contains only a list with no details. |
| ⓘ 'Monazite Group' Formula: REE(PO4) |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Colour: silvery |
| ⓘ Formula: Na2Al2Si3O10 · 2H2O Description: Reference contains only a list with no details, and natrolite is questioned in the reference. Very unlikely. |
| ⓘ Opal Formula: SiO2 · nH2O Description: Reference contains only a list with no details, but it is common in all pegmatites in the district. |
| ⓘ Pyrite Formula: FeS2 Habit: massive Description: Reference contains only a list with no details. |
| ⓘ Quartz Formula: SiO2 Colour: clear to smoky |
| ⓘ Samarskite-(Y) Formula: YFe3+Nb2O8 |
| ⓘ Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) Colour: black |
| ⓘ Spessartine Formula: Mn2+3Al2(SiO4)3 Habit: trapezohedral Colour: orange-red Description: Crystals to a few mm. Januzzi provides only a list of minerals with no details. This pegmatite is not very mineralogically complex. This EDS spectrum appears to show more Mn than Fe, but does not provide atomic percentages: https://www.mindat.org/photo-929536.html |
| ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | 'Microlite Group' ? | 4.00. | A2-mTa2X6-wZ-n |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Hematite ? | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| ⓘ | Samarskite-(Y) | 4.DB.25 | YFe3+Nb2O8 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite ? | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| ⓘ | Meta-autunite | 8.EB.10 | Ca(UO2)2(PO4)2 · 6H2O |
| ⓘ | Metatorbernite | 8.EB.10 | Cu(UO2)2(PO4)2 · 8H2O |
| Group 9 - Silicates | |||
| ⓘ | Almandine | 9.AD.25 | Fe2+3Al2(SiO4)3 |
| ⓘ | Spessartine | 9.AD.25 | Mn2+3Al2(SiO4)3 |
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Beryl var. Aquamarine | 9.CJ.05 | Be3Al2Si6O18 |
| ⓘ | 9.CJ.05 | Be3Al2(Si6O18) | |
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | Annite | 9.EC.20 | KFe2+3(AlSi3O10)(OH)2 |
| ⓘ | Microcline | 9.FA.30 | K(AlSi3O8) |
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| ⓘ | var. Peristerite | 9.FA.35 | Na(AlSi3O8) |
| ⓘ | Natrolite ? | 9.GA.05 | Na2Al2Si3O10 · 2H2O |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
| ⓘ | 'Monazite Group' | - | REE(PO4) |
| ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
| ⓘ | 'Columbite-(Fe)-Columbite-(Mn) Series' | - | |
| ⓘ | 'Hornblende Root Name Group' | - | ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2 |
| ⓘ | 'Allanite Group' ? | - | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| H | ⓘ Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| H | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| Be | Beryllium | |
| Be | ⓘ Beryl var. Aquamarine | Be3Al2Si6O18 |
| Be | ⓘ Beryl | Be3Al2(Si6O18) |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| O | ⓘ Beryl var. Aquamarine | Be3Al2Si6O18 |
| O | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| O | ⓘ Beryl | Be3Al2(Si6O18) |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Fluorapatite | Ca5(PO4)3F |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| O | ⓘ Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
| O | ⓘ Microcline | K(AlSi3O8) |
| O | ⓘ Monazite Group | REE(PO4) |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Samarskite-(Y) | YFe3+Nb2O8 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | ⓘ Albite var. Peristerite | Na(AlSi3O8) |
| O | ⓘ Columbite-(Fe)-Columbite-(Mn) Series | |
| O | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| O | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| F | Fluorine | |
| F | ⓘ Fluorapatite | Ca5(PO4)3F |
| F | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Na | ⓘ Albite var. Peristerite | Na(AlSi3O8) |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| Al | ⓘ Beryl var. Aquamarine | Be3Al2Si6O18 |
| Al | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Al | ⓘ Beryl | Be3Al2(Si6O18) |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Microcline | K(AlSi3O8) |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| Al | ⓘ Albite var. Peristerite | Na(AlSi3O8) |
| Al | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Si | Silicon | |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| Si | ⓘ Beryl var. Aquamarine | Be3Al2Si6O18 |
| Si | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Si | ⓘ Beryl | Be3Al2(Si6O18) |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Microcline | K(AlSi3O8) |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| Si | ⓘ Albite var. Peristerite | Na(AlSi3O8) |
| Si | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Si | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| P | Phosphorus | |
| P | ⓘ Fluorapatite | Ca5(PO4)3F |
| P | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| P | ⓘ Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
| P | ⓘ Monazite Group | REE(PO4) |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Cl | Chlorine | |
| Cl | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| K | Potassium | |
| K | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| K | ⓘ Microcline | K(AlSi3O8) |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Fluorapatite | Ca5(PO4)3F |
| Ca | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| Ca | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Mn | Manganese | |
| Mn | ⓘ Spessartine | Mn32+Al2(SiO4)3 |
| Mn | ⓘ Columbite-(Fe)-Columbite-(Mn) Series | |
| Fe | Iron | |
| Fe | ⓘ Annite | KFe32+(AlSi3O10)(OH)2 |
| Fe | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Samarskite-(Y) | YFe3+Nb2O8 |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Fe | ⓘ Columbite-(Fe)-Columbite-(Mn) Series | |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
| Y | Yttrium | |
| Y | ⓘ Samarskite-(Y) | YFe3+Nb2O8 |
| Nb | Niobium | |
| Nb | ⓘ Samarskite-(Y) | YFe3+Nb2O8 |
| Nb | ⓘ Columbite-(Fe)-Columbite-(Mn) Series | |
| Ta | Tantalum | |
| Ta | ⓘ Microlite Group | A2-mTa2X6-wZ-n |
| U | Uranium | |
| U | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| U | ⓘ Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ganderia DomainDomain
- GranderiaPassive Margin
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References
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
Schooner, Richard (1955) 90 Minerals from 1 Connecticut Hill. Rocks & Minerals, 30 (7-8). 351-358 doi:10.1080/00357529.1955.11767837
Hale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA