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:
Little Erma Mine, 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: 182334
mindat URL: http://www.mindat.org/loc-182334.html

Tectonic Settings:

Total number of sublocalities beneath "Little Erma Mine, San Rafael District (San Rafael Swell), Emery Co., Utah, USA": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Little Erma No. 1
Little Erma No. 2 Claim

Latitude: 38°37'38"N
Longitude: 110°45'56"W
Decimal Degree (lat, lon): 38.627222222222,-110.76555555556

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.

Allophane	Alunite	Fluorite	Gypsum	Malachite	None

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 C Ca Cu Fe H K O S Si U

Elements from minerals reported directly at this locality: Al C Cu H O Si

Structural Groups for minerals in this locality:
Allophane Alunite Fluorite Gypsum Malachite None

5 IMA Minerals at location:

Chrysocolla ()*	Gypsum ()*	Jarosite ()*	Malachite ()*	Uraninite ()*

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
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	117	82	0		3531
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	117	82	1	272616	6890
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆	117	82	1	272616	2228
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	117	82	0		12537
Uraninite ()*	Fluorite	UO₂	117	82	1	272616	2718

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...