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:
Andover, Essex Co., Massachusetts, USA

Oldest recorded age at locality: 990
Youngest recorded age at locality: 230.03

mindat Locality ID: 22301
mindat URL: http://www.mindat.org/loc-22301.html

Tectonic Settings:

Total number of sublocalities beneath "Andover, Essex Co., Massachusetts, USA": 7
Total number of bottom-level sublocalities: 6

Number of Child Localities: 3
Child Localities:
Blue Soapstone Quarry (Jenkins Quarry; Hill's Quarry)
I-93/Dascomb Rd. Area
Routes 125 And 28 Interchange Road Cuts

Latitude: 42°37'0"N
Longitude: 71°9'"W
Decimal Degree (lat, lon): 42.616666666667,-71.15
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 B Be C Ca F Fe H K Li Mg Mn Na O P S Si Ti U Zn 

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

Structural Groups for minerals in this locality: 
AmorphousApatiteAutuniteBerylCalciteClayCorundumEpidoteFeldsparGarnet
MicaNickelineNoneNot in a structural groupOlivinePyriteQuartzSphaleriteSpinelTalc
Tourmaline

23 IMA Minerals at location:
Albite  (*)Almandine  (*)Autunite  (*)Bertrandite  (*)Beryl  (*)
Calcite  (*)Diadochite  (*)Ferrisicklerite  (*)Fluorapatite  (*)Heterosite  (*)
Ilmenite  (*)Magnetite  (*)Microcline  (*)Muscovite  (*)Pyrite  (*)
Pyrrhotite  (*)Quartz  (*)Schorl  (*)Sphalerite  (*)Talc  (*)
Triphylite  (*)Uranophane-α  (*)Zoisite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)12193038803
Almandine  (*)GarnetFe2+3Al2(SiO4)3990230.0302353
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O990230.0312193021272
Bertrandite  (*)Not in a structural groupBe4Si2O7(OH)2990230.031219302606
Beryl  (*)BerylBe3Al2Si6O18990230.032219302,2193034286
Calcite  (*)CalciteCa(CO3)121930127770
Diadochite  (*)AmorphousFe3+2(PO4)(SO4)(OH)·6H2O121930381
Ferrisicklerite  (*)OlivineLi1-x(Fe3+,Mn2+)(PO4)1219303108
Fluorapatite  (*)ApatiteCa5(PO4)3F990230.032219302,2193032740
Heterosite  (*)OlivineFe3+(PO4)1219303204
Ilmenite  (*)CorundumFe2+Ti4+O312193035433
Magnetite  (*)SpinelFe2+Fe3+2O4121930114899
Microcline  (*)FeldsparK(AlSi3O8)39838212193024924
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2242.03230.03121930217380
Pyrite  (*)PyriteFeS2990230.03039462
Pyrrhotite  (*)NickelineFe7S812193039056
Quartz  (*)QuartzSiO2990230.032219302,21930361156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)990230.0312193022705
Sphalerite  (*)SphaleriteZnS121930321482
Talc  (*)Clay TalcMg3Si4O10(OH)212193013337
Triphylite  (*)OlivineLiFe2+(PO4)1219303313
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O990230.031219302890
Zoisite  (*)EpidoteCa2Al3[Si2O7][SiO4]O(OH)990230.0301025


4 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
USGS-Rb-Sr-06237990918954±36Rb-Sr plagioclase     33585I-93/Dascomb Rd. Area, Andover, Essex Co., Massachusetts, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-06238398382390±8Rb-Sr microcline   Microcline  33585I-93/Dascomb Rd. Area, Andover, Essex Co., Massachusetts, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-06239242.03230.03236.03±6Rb-Sr muscovite   Muscovite  33585I-93/Dascomb Rd. Area, Andover, Essex Co., Massachusetts, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-06241242.03230.03236.03±6Rb-Sr muscovite   Muscovite  33585I-93/Dascomb Rd. Area, Andover, Essex Co., Massachusetts, USA USGS-Rb-Sr USGS-Rb-Sr 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

All age data...

Other copyright data...