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:
Newtown, Grass Valley District, Nevada Co., California, USA

Oldest recorded age at locality: 157
Youngest recorded age at locality: 157

mindat Locality ID: 268009
mindat URL: http://www.mindat.org/loc-268009.html

Tectonic Settings:

Total number of sublocalities beneath "Newtown, Grass Valley District, Nevada Co., California, USA": 14
Total number of bottom-level sublocalities: 14

Number of Child Localities: 14
Child Localities:
A & B Native Son Lode Mine (Native Son)
Codd Prospects
Contention Placer
Empress Mine (Newton; Dull; Mulcahy)
Grass Valley Extension Mine (Grass Valley Ext.)
Jordan Mine (Glennan Mine)
Midnight Mine
Mulcahy Prospect
Patty Craney Mine
Peck Fraction Occurrence
Porter Property
Red Hill Specimen Occurrence
Unnamed Fe Occurrence [2] (Iron Location)
Uranus Mine

Latitude: 39°14'52"N
Longitude: 121°5'33"W
Decimal Degree (lat, lon): 39.247777777778,-121.0925

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: Au Cr Fe O Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
CopperNoneQuartzSpinel

3 IMA Minerals at location:
Chromite  (*)Gold  (*)Quartz  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Chromite  (*)SpinelFe2+Cr2O41571573165681,165687,1656903902
Gold  (*)CopperAu4165680,165683,165684,16569330554
Quartz  (*)QuartzSiO24165680,165683,165684,16569361156



3 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
podchrome-00173157157Middle Jurassic       Cr83973Codd Prospects, Newtown, Grass Valley District, Nevada Co., California, USACoddMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00172157157Middle Jurassic       Cr84455Mulcahy Prospect, Newtown, Grass Valley District, Nevada Co., California, USAMulcahyMoiser et al. (2012) USGSSIR2012_5157 
podchrome-00170157157Middle Jurassic       Cr84595Porter Property, Newtown, Grass Valley District, Nevada Co., California, USAPorter PropertyMoiser et al. (2012) USGSSIR2012_5157 


SampleSource LocalityReference URL


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