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 Microcline at Brown Derby Mine, Quartz Creek Pegmatite District, Gunnison Co., Colorado, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 1490Ma - 1250Ma 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
Bradley_2012_146	1490	1350				5902	Brown Derby Mine, Quartz Creek Pegmatite District, Gunnison Co., Colorado, USA	McCauley and Bradley (2014)	CM52_183
Alexandra-0309	1450	1250				5902	Brown Derby Mine, Quartz Creek Pegmatite District, Gunnison Co., Colorado, USA	Aldrich et al. (1956)	JGR61_215

Locality age

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
Alexandra-0309	1450	1250				5902	Brown Derby Mine, Quartz Creek Pegmatite District, Gunnison Co., Colorado, USA	Aldrich et al. (1956)	JGR61_215
Bradley_2012_146	1490	1350				5902	Brown Derby Mine, Quartz Creek Pegmatite District, Gunnison Co., Colorado, USA	McCauley and Bradley (2014)	CM52_183