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:
Dexter Group, Calf Mesa, San Rafael District (San Rafael Swell), Emery Co., Utah, USA

Oldest recorded age at locality: 410
Youngest recorded age at locality: 82

mindat Locality ID: 37796
mindat URL: http://www.mindat.org/loc-37796.html

Tectonic Settings:

Total number of sublocalities beneath "Dexter Group, Calf Mesa, San Rafael District (San Rafael Swell), Emery Co., Utah, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 39°2'20"N
Longitude: 110°42'39"W
Decimal Degree (lat, lon): 39.038888888889,-110.71083333333

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.

Amorphous	Autunite	Chalcanthite	Chalcopyrite	Copiapite	Coquimbite	Covellite	Fluorite	Halotrichite	Melanterite
None	Not in a structural group	Pyrite	Römerite	Sulphur	Tetrahedrite	Voltaite	Zippeite

Alunogen ()*	Butlerite ()*	Chalcanthite ()*	Chalcocite ()*	Chalcopyrite ()*
Copiapite ()*	Coquimbite ()*	Covellite ()*	Diadochite ()*	Fibroferrite ()*
Goldichite ()*	Halotrichite ()*	Melanterite ()*	Metazeunerite ()*	Parabutlerite ()*
Pyrite ()*	Römerite ()*	Sulphur ()*	Tennantite-(Fe) ()*	Tetrahedrite-(Zn) ()*
Uraninite ()*	Voltaite ()*	Zeunerite ()*	Zippeite ()*

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 As Cu Fe H K O P S Sb U

Elements from minerals reported directly at this locality: Al As Cu Fe H K O P S Sb U Zn

Structural Groups for minerals in this locality:
Amorphous Autunite Chalcanthite Chalcopyrite Copiapite Coquimbite Covellite Fluorite Halotrichite Melanterite
None Not in a structural group Pyrite Römerite Sulphur Tetrahedrite Voltaite Zippeite

24 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Alunogen ()*	Not in a structural group	Al₂(SO₄)₃(H₂O)₁₂·5H₂O	117	82	272
Butlerite ()*	Not in a structural group	Fe³⁺(SO₄)(OH)·2H₂O	117	82	26
Chalcanthite ()*	Chalcanthite	Cu(SO₄)·5H₂O	117	82	925
Chalcocite ()*	None	Cu₂S	117	82	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	117	82	27198
Copiapite ()*	Copiapite	Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂·20H₂O	117	82	382
Coquimbite ()*	Coquimbite	AlFe₃(SO₄)₆(H₂O)₁₂·6H₂O	117	82	136
Covellite ()*	Covellite	CuS	117	82	4165
Diadochite ()*	Amorphous	Fe³⁺₂(PO₄)(SO₄)(OH)·6H₂O	117	82	81
Fibroferrite ()*	Not in a structural group	Fe³⁺(SO₄)(OH)·5H₂O	117	82	107
Goldichite ()*	None	KFe³⁺(SO₄)₂·4H₂O	117	82	12
Halotrichite ()*	Halotrichite	Fe²⁺Al₂(SO₄)₄·22H₂O	117	82	409
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	117	82	915
Metazeunerite ()*	None	Cu(UO₂)₂(AsO₄)₂·8H₂O	117	82	182
Parabutlerite ()*	Not in a structural group	Fe³⁺(SO₄)(OH)·2H₂O	117	82	23
Pyrite ()*	Pyrite	FeS₂	117	82	39462
Römerite ()*	Römerite	Fe²⁺Fe³⁺₂(SO₄)₄·14H₂O	117	82	115
Sulphur ()*	Sulphur	S	117	82	2045
Tennantite-(Fe) ()*	Tetrahedrite	Cu₆(Cu₄Fe₂)As₄S₁₃	117	82	1803
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	117	82	5317
Uraninite ()*	Fluorite	UO₂	117	82	2718
Voltaite ()*	Voltaite	K₂Fe²⁺₅Fe³⁺₃Al(SO₄)₁₂·18H₂O	117	82	111
Zeunerite ()*	Autunite	Cu(UO₂)₂(AsO₄)₂·12H₂O	117	82	185
Zippeite ()*	Zippeite	K₂[(UO₂)₄(SO₄)₂O₂(OH)₂](H₂O)₄	117	82	175

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Giersdorf_00000547	Urano-organic ore associated with a collapse structure in Triassic Sandstone, part of the Chinle Formation. Uranium Ore is found over a wide stratigraphic range
Giersdorf_00000548	Urano-organic ore associated with a collapse structure in Triassic Sandstone, part of the Chinle Formation. Uranium Ore is found over a wide stratigraphic range
Giersdorf_00000549	Urano-organic ore associated with a collapse structure in Triassic Sandstone, part of the Chinle Formation. Uranium Ore is found over a wide stratigraphic range
Giersdorf_00000550	Urano-organic ore associated with a collapse structure in Triassic Sandstone, part of the Chinle Formation. Uranium Ore is found over a wide stratigraphic range
Giersdorf_00000551	Urano-organic ore associated with a collapse structure in Triassic Sandstone, part of the Chinle Formation. Uranium Ore is found over a wide stratigraphic range
Giersdorf_00000552	Urano-organic ore associated with a collapse structure in Triassic Sandstone, part of the Chinle Formation. Uranium Ore is found over a wide stratigraphic range

6 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	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
Giersdorf_00000547	86	82	84±2	238U-206U			uraninite	K-154	Yes	Uraninite	Uraninite	U	180697	Calyx No. 8, Temple Mountain, San Rafael District (San Rafael Swell), Emery Co., Utah, USA	San Rafael Swell	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Age given for U238-Pb206 analysis
Giersdorf_00000548	96	86	91±5	235U-207Pb			uraninite	K-154	Yes	Uraninite	Uraninite	U	180697	Calyx No. 8, Temple Mountain, San Rafael District (San Rafael Swell), Emery Co., Utah, USA	San Rafael Swell	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Age given for U235-Pb207 analysis
Giersdorf_00000549	410	260	335±75	207Pb-206Pb	The Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methods	low	uraninite	K-154	Yes	Uraninite	Uraninite	U	180697	Calyx No. 8, Temple Mountain, San Rafael District (San Rafael Swell), Emery Co., Utah, USA	San Rafael Swell	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Age given for Pb207-Pb206 analysis
Giersdorf_00000550	104	100	102±2	238U-206U			uraninite	K-155	Yes	Uraninite	Uraninite	U	182883	North Mesa 9 & 10, North Mesa Mine Group, Temple Mountain, San Rafael District (San Rafael Swell), Emery Co., Utah, USA	San Rafael Swell	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Age given for U238-Pb206 analysis
Giersdorf_00000551	117	97	107±10	235U-207Pb			uraninite	K-155	Yes	Uraninite	Uraninite	U	182883	North Mesa 9 & 10, North Mesa Mine Group, Temple Mountain, San Rafael District (San Rafael Swell), Emery Co., Utah, USA	San Rafael Swell	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Age given for U235-Pb207 analysis
Giersdorf_00000552	335	185	260±75	207Pb-206Pb	The Pb207-Pb206 age given for these samples is described as being highly erroneous due to the systematic sensitivity of the analytic methods	low	uraninite	K-155	Yes	Uraninite	Uraninite	U	182883	North Mesa 9 & 10, North Mesa Mine Group, Temple Mountain, San Rafael District (San Rafael Swell), Emery Co., Utah, USA	San Rafael Swell	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Age given for Pb207-Pb206 analysis

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...