Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org

Ages for Sphalerite at Round Mountain, Silverton, Animas District, San Juan Co., Colorado, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 26Ma - 13Ma at this locality

Age range from children

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
Giersdorf_00000597	26	22	Uraninite	Uraninite	U	4142	Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USA	Miller et al. (1963)	GSAB74_609
Jen_0001438	16.6	13	Scheelite			3663	Silverton, Animas District, San Juan Co., Colorado, USA	Poulin et al. (2016)	CM54_1147

Locality age (remote)

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
Giersdorf_00000596	24	20	Uraninite	Uraninite	U	4142	Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USA	Miller et al. (1963)	GSAB74_609
Giersdorf_00000597	26	22	Uraninite	Uraninite	U	4142	Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USA	Miller et al. (1963)	GSAB74_609
Jen_0001438	16.6	13	Scheelite			3663	Silverton, Animas District, San Juan Co., Colorado, USA	Poulin et al. (2016)	CM54_1147

Locality age (deprioritized) (remote)

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	Dated Locality ID	Dated Locality	Ref	Ref ID
Giersdorf_00000598	380	280	Uraninite	Uraninite	U	4142	Happy Jack Mine (Blue Dike Mine), White Canyon, White Canyon District, San Juan Co., Utah, USA	Miller et al. (1963)	GSAB74_609