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 Ilsemannite at Boulder County Tungsten District, Boulder Co., Colorado, USA

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

Locality age

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Dated Locality ID	Dated Locality	Ref	Ref ID
USGS-U-Th-Pb-02102_206_238	1414	1414	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02102_207_206	1653	1653	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02102_207_235	1512	1512	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02103_206_238	1353	1353	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02103_207_206	1646	1646	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02103_207_235	1471	1471	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02104_206_238	1179	1179	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02104_207_206	1629	1629	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02104_207_235	1349	1349	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02105_206_238	935	935	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02105_207_206	1591	1591	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02105_207_235	1154	1154	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb