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:
Howardsville, Animas District, San Juan Co., Colorado, USA

Oldest recorded age at locality: 380
Youngest recorded age at locality: 20

mindat Locality ID: 3680
mindat URL: http://www.mindat.org/loc-3680.html

Tectonic Settings:

Total number of sublocalities beneath "Howardsville, Animas District, San Juan Co., Colorado, USA": 14
Total number of bottom-level sublocalities: 11

Number of Child Localities: 4
Child Localities:
Canby Mountain
Galena Mountain
King Solomon Mountain
Maggie Gulch Occurrence

Latitude: 37°49'16"N
Longitude: 107°33'53"W
Decimal Degree (lat, lon): 37.821111111111,-107.56472222222

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.

Acanthite	Aragonite	Calcite	Chalcopyrite	Clay	Columbite	Copper	Corundum	Fluorite	Mica
None	Pyrite	Quartz	Rhodonite	Rocksalt	Sphalerite	Stibnite	Tetrahedrite

Acanthite ()*	Bismuthinite ()*	Boulangerite ()*	Calcite ()*	Cerussite ()*
Chalcopyrite ()*	Fluorite ()*	Freibergite ()*	Galena ()*	Gold ()*
Hematite ()*	Hübnerite ()*	Muscovite ()*	Proustite ()*	Pyrite ()*
Quartz ()*	Rhodochrosite ()*	Rhodonite ()*	Siderite ()*	Silver ()*
Sphalerite ()*	Tetrahedrite-(Zn) ()*	Zunyite ()*

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 Au Bi C Ca Cl Cu F Fe H K Mn O Pb S Sb Si W Zn

Elements from minerals reported directly at this locality: Al C Ca Cl F Fe H Mn O Pb S Sb Si

Structural Groups for minerals in this locality:
Acanthite Aragonite Calcite Chalcopyrite Clay Columbite Copper Corundum Fluorite Mica
None Pyrite Quartz Rhodonite Rocksalt Sphalerite Stibnite Tetrahedrite

23 IMA Minerals at location:

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
Acanthite ()*	Acanthite	Ag₂S	26	20	1	196091	2793
Bismuthinite ()*	Stibnite	Bi₂S₃	26	20	1	196088	1935
Boulangerite ()*	None	Pb₅Sb₄S₁₁	26	20	0		843
Calcite ()*	Calcite	Ca(CO₃)	26	20	1	196091	27770
Cerussite ()*	Aragonite	Pb(CO₃)	26	20	1	196085	4979
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	26	20	3	196085,196094,196096	27198
Fluorite ()*	Fluorite	CaF₂	26	20	1	196092	9617
Freibergite ()*	Tetrahedrite	Ag₆[Cu₄Fe₂]Sb₄S₁₂	26	20	2	196094,196095	663
Galena ()*	Rocksalt	PbS	26	20	5	196085,196091,196094,196095,196096	24243
Gold ()*	Copper	Au	26	20	1	196095	30554
Hematite ()*	Corundum	Fe₂O₃	26	20	1	196088	14640
Hübnerite ()*	Columbite	Mn²⁺(WO₄)	26	20	1	196092	469
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	26	20	2	196091,196092	17380
Proustite ()*	None	Ag₃AsS₃	26	20	1	196091	733
Pyrite ()*	Pyrite	FeS₂	26	20	4	196085,196092,196094,196096	39462
Quartz ()*	Quartz	SiO₂	26	20	6	196088,196091,196092,196094,196095,196097	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)	26	20	0		1711
Rhodonite ()*	Rhodonite	CaMn₃Mn(Si₅O₁₅)	26	20	0		969
Siderite ()*	Calcite	Fe(CO₃)	26	20	0		6417
Silver ()*	Copper	Ag	26	20	1	196085	5186
Sphalerite ()*	Sphalerite	ZnS	26	20	2	196085,196096	21482
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	26	20	1	196085	5317
Zunyite ()*	None	Al₁₃Si₅O₂₀(OH,F)₁₈Cl	26	20	0		86

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	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_00000596	24	20	22±2	238U-206U			uraninite	K-172	Yes	Uraninite	Uraninite	U	4142	Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USA	Happy Jack Mine	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_00000597	26	22	24±2	235U-207Pb			uraninite	K-172	Yes	Uraninite	Uraninite	U	4142	Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USA	Happy Jack Mine	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_00000598	380	280	330±50	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-172	Yes	Uraninite	Uraninite	U	4142	Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USA	Happy Jack Mine	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...