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:
Gray Eagle Prospect (Gray Eagle Discovery Prospect; Gray Eagle Claim), Tejon Tin Project (Gorman Tin Project), Lebec, Gorman District, Tehachapi Mts, Kern Co., California, USA

Oldest recorded age at locality: 100
Youngest recorded age at locality: 90

mindat Locality ID: 80059
mindat URL: http://www.mindat.org/loc-80059.html

Tectonic Settings:

Total number of sublocalities beneath "Gray Eagle Prospect (Gray Eagle Discovery Prospect; Gray Eagle Claim), Tejon Tin Project (Gorman Tin Project), Lebec, Gorman District, Tehachapi Mts, Kern Co., California, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 34°51'37"N
Longitude: 118°45'12"W
Decimal Degree (lat, lon): 34.860277777778,-118.75333333333

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.

Arsenopyrite	Ludwigite	Molybdenite	None	Rutile	Spinel

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: As B Fe Mg Mo O S Sn

Elements from minerals reported directly at this locality: As B Fe Mg Mo O S Sn

Structural Groups for minerals in this locality:
Arsenopyrite Ludwigite Molybdenite None Rutile Spinel

6 IMA Minerals at location:

Arsenopyrite ()*	Cassiterite ()*	Ludwigite ()*	Maghemite ()*	Magnetite ()*
Molybdenite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS	100	90	9052
Cassiterite ()*	Rutile	SnO₂	100	90	5171
Ludwigite ()*	Ludwigite	Mg₂Fe³⁺O₂(BO₃)	100	90	134
Maghemite ()*	Spinel	(Fe³⁺_0.67 _0.33)Fe³⁺₂O₄	100	90	229
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	100	90	14899
Molybdenite ()*	Molybdenite	MoS₂	100	90	5800

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_156	100	90	95±5	U/Pb			zircon			Yes	Zircon			213077	Tehachapi Mts, Kern Co., California, USA	[Tehachapi 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...