Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Chelmsford, Middlesex Co., Massachusetts, USA


mindat Locality ID: 22407
mindat URL: http://www.mindat.org/loc-22407.html

Tectonic Settings:

Total number of sublocalities beneath "Chelmsford, Middlesex Co., Massachusetts, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Chelmsford Lime Quarries
Robin's Hill Copperas Mine

Latitude: 42°35'12"N
Longitude: 71°21'47"W
Decimal Degree (lat, lon): 42.586666666667,-71.363055555556
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al C Ca Ce Cu F Fe H K Mg Na O P S Si Ti W Zr 

Elements from minerals reported directly at this locality: Al Ca F Fe H Mg O Si 

Structural Groups for minerals in this locality: 
AmphiboleApatiteBrookiteBruciteCalciteChalcopyriteClayCorundumFluoriteGarnet
HumiteMelanteriteMicaMonaziteNickelineNoneOlivinePyritePyroxeneQuartz
RutileScheeliteSpinelTitaniteZircon

28 IMA Minerals at location:
Actinolite  (*)Almandine  (*)Brookite  (*)Brucite  (*)Calcite  (*)
Chalcopyrite  (*)Chondrodite  (*)Diopside  (*)Dolomite  (*)Fluorapatite  (*)
Fluorite  (*)Forsterite  (*)Geikielite  (*)Grossular  (*)Magnesite  (*)
Melanterite  (*)Monazite-(Ce)  (*)Pargasite  (*)Phlogopite  (*)Pyrite  (*)
Pyrrhotite  (*)Quartz  (*)Rutile  (*)Scheelite  (*)Spinel  (*)
Titanite  (*)Tremolite  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)212195903419
Almandine  (*)GarnetFe2+3Al2(SiO4)302353
Brookite  (*)BrookiteTiO21219590700
Brucite  (*)BruciteMg(OH)20462
Calcite  (*)CalciteCa(CO3)121959027770
Chalcopyrite  (*)ChalcopyriteCuFeS2121959027198
Chondrodite  (*)HumiteMg5(SiO4)2F20285
Diopside  (*)PyroxeneCaMgSi2O612195904135
Dolomite  (*)NoneCaMg(CO3)212195909895
Fluorapatite  (*)ApatiteCa5(PO4)3F12195902740
Fluorite  (*)FluoriteCaF212195909617
Forsterite  (*)OlivineMg2(SiO4)12195901188
Geikielite  (*)CorundumMgTiO3121959070
Grossular  (*)GarnetCa3Al2(SiO4)301544
Magnesite  (*)CalciteMg(CO3)12195901487
Melanterite  (*)MelanteriteFe(SO4)·7H2O1219591915
Monazite-(Ce)  (*)MonaziteCe(PO4)1219590945
Pargasite  (*)AmphiboleNaCa2(Mg4Al)(Si6Al2)O22(OH)21219590313
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)212195902273
Pyrite  (*)PyriteFeS2121959039462
Pyrrhotite  (*)NickelineFe7S812195909056
Quartz  (*)QuartzSiO2121959061156
Rutile  (*)RutileTiO212195905614
Scheelite  (*)ScheeliteCa(WO4)12195904894
Spinel  (*)SpinelMgAl2O412195901934
Titanite  (*)TitaniteCaTi(SiO4)O12195904899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)212195902562
Zircon  (*)ZirconZr(SiO4)12195905251


No ages have been assigned to this locality yet.
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All locality data graciously provided by mindat.org

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