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:
Fort Irwin, San Bernardino Co., California, USA

Oldest recorded age at locality: 162
Youngest recorded age at locality: 134

mindat Locality ID: 215885
mindat URL: http://www.mindat.org/loc-215885.html

Tectonic Settings:

Total number of sublocalities beneath "Fort Irwin, San Bernardino Co., California, USA": 6
Total number of bottom-level sublocalities: 5

Number of Child Localities: 5
Child Localities:
Barber Bentonite Mine
Lester Mine
Tiefort Mts
Unnamed Diorite Pegmatite [1]
Unnamed Limestone Occurrence [9]

Latitude: 35°14'44"N
Longitude: 116°37'44"W
Decimal Degree (lat, lon): 35.245555555556,-116.62888888889

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.

Amphibole	Calcite	Copper	Corundum	Feldspar	None	Quartz	Titanite

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 Au C Ca Fe H Na O Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Calcite Copper Corundum Feldspar None Quartz Titanite

7 IMA Minerals at location:

Albite ()*	Calcite ()*	Gold ()*	Hastingsite ()*	Hematite ()*
Quartz ()*	Titanite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)			1	171598	8803
Calcite ()*	Calcite	Ca(CO₃)			1	171598	27770
Gold ()*	Copper	Au			1	171595	30554
Hastingsite ()*	Amphibole	NaCa₂(Fe²⁺₄Fe³⁺)(Si₆Al₂)O₂₂(OH)₂			1	171598	209
Hematite ()*	Corundum	Fe₂O₃	162	134	1	171597	14640
Quartz ()*	Quartz	SiO₂			2	171595,171598	61156
Titanite ()*	Titanite	CaTi(SiO₄)O			1	171598	4899

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
	Bradley_2012_073	162	134	148±14	U/Pb			zircon				Zircon			219963	Tiefort Mts, Fort Irwin, San Bernardino Co., California, USA	[S. Tiefort Mtns]	McCauley and Bradley (2014)	10.3749/canmin.52.2.183	CM52_183

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...