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:
Snow Cap Mine, Rush Creek, Rush Creek Deposit, Big Creek-Rush Creek District, Fresno Co., California, USA

Oldest recorded age at locality: 145
Youngest recorded age at locality: 66

mindat Locality ID: 26151
mindat URL: http://www.mindat.org/loc-26151.html

Tectonic Settings:

Total number of sublocalities beneath "Snow Cap Mine, Rush Creek, Rush Creek Deposit, Big Creek-Rush Creek District, Fresno Co., California, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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: B Ba Ca Cl Fe H Mg O S Si Ti Zr 

Elements from minerals reported directly at this locality: B Ba Ca Cl Fe H Mg O S Si Ti Zr 

Structural Groups for minerals in this locality: 
BenitoiteMargarosaniteMeliliteNickelineNoneQuartz

7 IMA Minerals at location:
Bazirite  (*)Fresnoite  (*)Pyrrhotite  (*)Quartz  (*)Sanbornite  (*)
Titantaramellite  (*)Walstromite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Bazirite  (*)BenitoiteBaZrSi3O914566011
Fresnoite  (*)MeliliteBa2TiO(Si2O7)14566017
Pyrrhotite  (*)NickelineFe7S81456609056
Quartz  (*)QuartzSiO214566061156
Sanbornite  (*)NoneBaSi2O514566013
Titantaramellite  (*)NoneBa4(Ti,Fe3+,Mg)4(O,OH)2[B2Si8O27]Clx14566010
Walstromite  (*)MargarosaniteBaCa2Si3O91456608



Locality Notes from all Ages at Locality:
Age IDLocality Notes
Michelle_501Big Creek - Rush Creek district is known for unique barium minerals. Sanbornite-quartz rock and associated foliated quartzite, occur within metasedimentary blocks in migmatite adjoining a granodiorite pluton


1 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
Michelle_50114566CretaceousStratigraphyAge of contact metamorphism   Yes Ba209815Big Creek-Rush Creek District, Fresno Co., California, USARush Creek - Big CreekWalstrom and Leising (2005) MR36_1Age of granodiorite intrusion. Barium deposits result in metasedimentary blocks within migmatite resulting from contact metamorphism.


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

All age data...

Other copyright data...