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:
Brysch Mine, Karnes Uranium District, Karnes Co., Texas, USA

Oldest recorded age at locality: 65.5
Youngest recorded age at locality: 2.6

mindat Locality ID: 42215
mindat URL: http://www.mindat.org/loc-42215.html

Tectonic Settings:

Total number of sublocalities beneath "Brysch Mine, Karnes Uranium District, Karnes Co., Texas, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 28°54'12"N
Longitude: 98°4'41"W
Decimal Degree (lat, lon): 28.903333333333,-98.078055555556

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.

Clay	Cristobalite	Fritzscheite	Meta-autunite	None	Smectite-vermiculite

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 Ca H Mg Na O P Si U V

Elements from minerals reported directly at this locality: Al Ca H Mg Na O P Si U V

Structural Groups for minerals in this locality:
Clay Cristobalite Fritzscheite Meta-autunite None Smectite-vermiculite

4 IMA Minerals at location:

Cristobalite ()*	Meta-autunite ()*	Metatyuyamunite ()*	Montmorillonite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Cristobalite ()*	Cristobalite	SiO₂	65.5	2.6	453
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	65.5	2.6	388
Metatyuyamunite ()*	Fritzscheite	Ca(UO₂)₂(VO₄)₂·3H₂O	65.5	2.6	129
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	65.5	2.6	1508

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
	Mo-00217	65.5	2.6								Yes		Molybdenite, Mourite, Powellite, Ilsemannite	Mo	27869	Karnes Uranium District, Karnes Co., Texas, USA		Reynolds and Goldhaber (1978); Reynolds et al. (1982)

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...