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

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The 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.

Benitoite	Margarosanite	Melilite	Nickeline	None	Quartz

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:
Benitoite Margarosanite Melilite Nickeline None Quartz

7 IMA Minerals at location:

Bazirite ()*	Fresnoite ()*	Pyrrhotite ()*	Quartz ()*	Sanbornite ()*
Titantaramellite ()*	Walstromite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Bazirite ()*	Benitoite	BaZrSi₃O₉	145	66	11
Fresnoite ()*	Melilite	Ba₂TiO(Si₂O₇)	145	66	17
Pyrrhotite ()*	Nickeline	Fe₇S₈	145	66	9056
Quartz ()*	Quartz	SiO₂	145	66	61156
Sanbornite ()*	None	BaSi₂O₅	145	66	13
Titantaramellite ()*	None	Ba₄(Ti,Fe³⁺,Mg)₄(O,OH)₂[B₂Si₈O₂₇]Cl_x	145	66	10
Walstromite ()*	Margarosanite	BaCa₂Si₃O₉	145	66	8

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_501	Big 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 ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Michelle_501	145	66	Cretaceous	Stratigraphy	Age of contact metamorphism					Yes			Ba	209815	Big Creek-Rush Creek District, Fresno Co., California, USA	Rush Creek - Big Creek	Walstrom and Leising (2005)		MR36_1	Age of granodiorite intrusion. Barium deposits result in metasedimentary blocks within migmatite resulting from contact metamorphism.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...