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Camptonite dike, Middlefield, Middlesex County, Connecticut, USAi
Regional Level Types
Camptonite dikeDike
Middlefield- not defined -
Middlesex CountyCounty
ConnecticutState
USACountry

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Latitude & Longitude (WGS84):
41° 32' 5'' North , 72° 44' 40'' West
Latitude & Longitude (decimal):
41.53472,-72.74444
GeoHash:
G#:drkk29jj7
GRN:
N28W40
Type:
Dike
Köppen climate type:
Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Meriden59,988(2017)5.2km
Durham2,933(2017)7.9km
Middletown46,756(2017)8.4km
Portland5,862(2017)9.6km
Cromwell13,750(2017)10.6km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut5km
Bristol Gem & Mineral ClubBristol, Connecticut23km
New Haven Mineral ClubNew Haven, Connecticut29km
Mindat Locality ID:
263492
Long-form identifier:
mindat:1:2:263492:3
GUID (UUID V4):
2a8c658a-ec55-48d9-bb9f-de4d071e7955


A 1.6-m wide Cretaceous camptonite dike (lamprophyre) cuts the crest of Higby Mountain, which is a N-S trending cuesta ridge with a west facing cliff underlain by the Jurassic Holyoke Basalt. According to Philpotts and Philpotts (2007), the dike is composed of fine-grained vesicular camptonite containing microphenocrysts of magnetite, titanaugite, and kaersutite in a groundmass of minute prisms of titanaugite, kaersutite, and apatite, and still smaller euhedral magnetite grains all poikilitically enclosed in larger plagioclase laths. Some of the vesicles are filled with carbonate and analcite (amygdules) and others with extremely acicular titanaugite and kaersutite in a cloudy alkali feldspar matrix. This same residual melt material fills mm-wide fractures that parallel the dikes contacts.

Note, the reference incorrectly gives the town as Meriden, whose eastern border is just to the west.

Select Mineral List Type

StandardDetailedGalleryStrunzChemical Elements

Mineral List


5 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical ListTree Diagram

Detailed Mineral List:

ⓘ'Alkali Feldspar'
ⓘAnalcime
Formula:Na(AlSi2O6) · H2O
Description: Filling small vesicles.
ⓘ'Apatite'
Formula:Ca5(PO4)3(Cl/F/OH)
ⓘAugite
Formula:(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAugite var. Titanium-bearing Augite
Formula:(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
ⓘCalcite
Formula:CaCO3
Description: Filling small vesicles.
ⓘKaersutite
Formula:NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
ⓘMagnetite
Formula:Fe2+Fe3+2O4
ⓘ'Plagioclase'
Formula:(Na,Ca)[(Si,Al)AlSi2]O8

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘvar. Titanium-bearing Augite9.DA.15(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
ⓘKaersutite9.DE.15NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
ⓘAnalcime9.GB.05Na(AlSi2O6) · H2O
Unclassified
ⓘ'Alkali Feldspar'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
HⓘAnalcimeNa(AlSi2O6) · H2O
HⓘApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
CⓘCalciteCaCO3
OOxygen
OⓘAnalcimeNa(AlSi2O6) · H2O
OⓘAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
OⓘCalciteCaCO3
OⓘKaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
OⓘMagnetiteFe2+Fe23+O4
OⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
OⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
OⓘApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
FⓘApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
NaⓘAnalcimeNa(AlSi2O6) · H2O
NaⓘKaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
NaⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
NaⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
MgMagnesium
MgⓘAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
MgⓘKaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
MgⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
AlAluminium
AlⓘAnalcimeNa(AlSi2O6) · H2O
AlⓘKaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
AlⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
AlⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
SiSilicon
SiⓘAnalcimeNa(AlSi2O6) · H2O
SiⓘAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
SiⓘKaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
SiⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
PPhosphorus
PⓘApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
ClⓘApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
CaⓘAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
CaⓘCalciteCaCO3
CaⓘKaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
CaⓘPlagioclase(Na,Ca)[(Si,Al)AlSi2]O8
CaⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
CaⓘApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
TiⓘKaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
TiⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
FeIron
FeⓘAugite(CaxMgyFez)(Mgy1Fez1)Si2O6
FeⓘMagnetiteFe2+Fe23+O4
FeⓘAugite var.Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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References

Philpotts, Anthony R. and Doreen E. Philpotts. (2007), Upward and downward flow in a camptonite dike as recorded by deformed vesicles and the anisotropy of magnetic susceptibility (AMS). Journal of Volcanology and Geothermal Research: 161: 81-94.
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