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 Dawn Mine (Little Don Mine; Grey Dawn), Paradox Valley District, Paradox Valley, San Juan Co., Utah, USA

Oldest recorded age at locality: 240
Youngest recorded age at locality: 65

mindat Locality ID: 38660
mindat URL: http://www.mindat.org/loc-38660.html

Tectonic Settings:

Total number of sublocalities beneath "Gray Dawn Mine (Little Don Mine; Grey Dawn), Paradox Valley District, Paradox Valley, San Juan Co., Utah, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 38°20'16"N
Longitude: 109°5'47"W
Decimal Degree (lat, lon): 38.337777777778,-109.09638888889

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.

Chalcopyrite	Covellite	Diaspore	Fluorite	Fritzscheite	Hewettite	Malachite	Mica	None	Not in a structural group
Phosphuranylite	Pyrite	Rocksalt	Sphalerite	Straczekite	Zircon

Azurite ()*	Carnotite ()*	Chalcocite ()*	Chalcopyrite ()*	Coffinite ()*
Corvusite ()*	Covellite ()*	Eucairite ()*	Galena ()*	Hewettite ()*
Nováčekite-I ()*	Malachite ()*	Metahewettite ()*	Metatorbernite ()*	Metatyuyamunite ()*
Montroseite ()*	Uranophane-β ()*	Phosphuranylite ()*	Pyrite ()*	Roscoelite ()*
Saléeite ()*	Sphalerite ()*	Torbernite ()*	Tyuyamunite ()*	Uraninite ()*
Uranophane-α ()*	Uranospathite ()*

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: Ag Al As C Ca Cu F Fe H K Mg Na O P Pb S Se Si U V Zn

Elements from minerals reported directly at this locality: Ag Al As C Ca Cu F Fe H K Mg Na O P Pb S Se Si U V Zn

Structural Groups for minerals in this locality:
Chalcopyrite Covellite Diaspore Fluorite Fritzscheite Hewettite Malachite Mica None Not in a structural group
Phosphuranylite Pyrite Rocksalt Sphalerite Straczekite Zircon

27 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	70	65	5509
Carnotite ()*	None	K₂(UO₂)₂(VO₄)₂·3H₂O	70	65	1184
Chalcocite ()*	None	Cu₂S	70	65	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	70	65	27198
Coffinite ()*	Zircon	U(SiO₄)·nH₂O	70	65	566
Corvusite ()*	Straczekite	(Na,Ca,K)_1-x(V⁵⁺,V⁴⁺,Fe²⁺)₈O₂₀·4H₂O	70	65	79
Covellite ()*	Covellite	CuS	70	65	4165
Eucairite ()*	None	CuAgSe	70	65	54
Galena ()*	Rocksalt	PbS	70	65	24243
Hewettite ()*	Hewettite	CaV⁵⁺₆O₁₆·9H₂O	70	65	58
Nováčekite-I ()*	None	Mg(UO₂)₂(AsO₄)₂·12H₂O	70	65	55
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	70	65	12537
Metahewettite ()*	Hewettite	CaV⁵⁺₆O₁₆·3H₂O	70	65	56
Metatorbernite ()*	None	Cu(UO₂)₂(PO₄)₂·8H₂O	70	65	443
Metatyuyamunite ()*	Fritzscheite	Ca(UO₂)₂(VO₄)₂·3H₂O	70	65	129
Montroseite ()*	Diaspore	(V³⁺,Fe²⁺,V⁴⁺)O(OH)	70	65	136
Uranophane-β ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	70	65	144
Phosphuranylite ()*	Phosphuranylite	KCa(H₃O)₃(UO₂)₇(PO₄)₄O₄·8H₂O	70	65	182
Pyrite ()*	Pyrite	FeS₂	70	65	39462
Roscoelite ()*	Mica	KV³⁺₂(Si₃Al)O₁₀(OH)₂	70	65	253
Saléeite ()*	None	Mg(UO₂)₂(PO₄)₂(H₂O)₁₀	70	65	95
Sphalerite ()*	Sphalerite	ZnS	70	65	21482
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	70	65	1059
Tyuyamunite ()*	None	Ca(UO₂)₂(VO₄)₂·5-8H₂O	70	65	628
Uraninite ()*	Fluorite	UO₂	70	65	2718
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O	70	65	890
Uranospathite ()*	None	(Al, )(UO₂)₂F(PO₄)₂·20H₂O	70	65	20

3 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	Dated Mineral	Minerals explicitely stated as having this age	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Giersdorf_00000602	65	65	65	238U-206U	Age is applied to the primary U minerals at this locality		uraninite	SS73	Uraninite	Coffinite, Uraninite	38660	Gray Dawn Mine (Little Don Mine; Grey Dawn), Paradox Valley District, Paradox Valley, San Juan Co., Utah, USA	Gray Dawn Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U238-Pb206 Age given by the USGS for the Morrison Formation found at the Gray Dawn Mine
Giersdorf_00000603	70	70	70	235U-207Pb	Age is applied to the primary U minerals at this locality		uraninite	SS73	Uraninite	Coffinite, Uraninite	38660	Gray Dawn Mine (Little Don Mine; Grey Dawn), Paradox Valley District, Paradox Valley, San Juan Co., Utah, USA	Gray Dawn Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	U235-Pb207 Age given by the USGS for the Morrison Formation found at the Gray Dawn Mine
Giersdorf_00000604	240	240	240	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	SS73	Uraninite	Coffinite, Uraninite	38660	Gray Dawn Mine (Little Don Mine; Grey Dawn), Paradox Valley District, Paradox Valley, San Juan Co., Utah, USA	Gray Dawn Mine	Miller et al. (1963)	10.1130/0016-7606(1963)74[609:IEOTOO]2.0.CO;2	GSAB74_609	Pb207-Pb206 Age given by the USGS for the Morrison Formation found at the Gray Dawn Mine

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...