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 Zircon at Fremont Co., Colorado, USA

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 551Ma - 506Ma 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
Jen_0000904	551	551	Riebeckite			24296	Gem Park Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000898	506	506	Titanite			122863	McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796

Direct age

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Dated Locality ID	Dated Locality	Ref	Ref ID
Bradley_2012_101	1435	1425	Zircon	224613	Five Points Gulch, Wet Mountains Area, Fremont Co., Colorado, USA	McCauley and Bradley (2014)	CM52_183
USGS-U-Th-Pb-01619_206_238	1442.6	1442.6	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01619_207_206	1656.1	1656.1	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01619_207_235	1531.3	1531.3	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01620_206_238	1366.9	1366.9	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01620_207_206	1645.7	1645.7	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01620_207_235	1479.9	1479.9	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01621_206_238	1279.8	1279.8	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01621_207_206	1693.1	1693.1	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01621_207_235	1420.8	1420.8	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01622_206_238	1169.1	1169.1	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01622_207_206	1633.6	1633.6	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01622_207_235	1343.6	1343.6	Zircon	113115	Sheila I Prospect, Texas Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01623_206_238	1327.1	1327.1	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01623_207_206	1625.4	1625.4	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01623_207_235	1445.9	1445.9	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01624_206_238	1019.6	1019.6	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01624_207_206	1563.3	1563.3	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01624_207_235	1208.3	1208.3	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01625_206_238	811.9	811.9	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01625_207_206	1494.5	1494.5	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01625_207_235	1018.7	1018.7	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01626_206_238	578.4	578.4	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01626_207_206	1351.2	1351.2	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01626_207_235	763.2	763.2	Zircon	112960	Dirty Gulch Mine (Copper Prince Mine?), Red Gulch District, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01650_206_238	1116.2	1116.2	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01650_207_206	1425.8	1425.8	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01650_207_235	1226.4	1226.4	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01651_206_238	1039.7	1039.7	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01651_207_206	1409.4	1409.4	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01651_207_235	1166.1	1166.1	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01652_206_238	1032.5	1032.5	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01652_207_206	1407.8	1407.8	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01652_207_235	1160.5	1160.5	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01653_206_238	1031.5	1031.5	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01653_207_206	1407.8	1407.8	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01653_207_235	1159.8	1159.8	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01654_206_238	970.5	970.5	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01654_207_206	1394.1	1394.1	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01654_207_235	1109.8	1109.8	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01655_206_238	904.7	904.7	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01655_207_206	1389.5	1389.5	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-01655_207_235	1058	1058	Zircon	112903	Blue Jay (Blue Spar), Cottonwood Creek Area, Fremont Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb

Locality age

Excel ID	Max Age (Ma)	Min Age (Ma)	Dated Mineral	Dated Locality ID	Dated Locality	Ref	Ref ID
Jen_0000886	511	511		159375	Democrat Creek Alkalic Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000887	512	512		159375	Democrat Creek Alkalic Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000888	534	534		159375	Democrat Creek Alkalic Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000893	528	528		122863	McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000894	520	520		122863	McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000895	508	508		122863	McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000896	521	521		122863	McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000897	540	530		122863	McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000898	506	506	Titanite	122863	McClure Gulch Carbonatite Dike, McClure Mountain, Iron Mountain Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0000904	551	551	Riebeckite	24296	Gem Park Complex, Fremont Co., Colorado, USA	Woolley and Kjarsgaard (2008)	GSCOF5796
NAVDAT-35593	32.8	22.8		113142	Triangle V (Trinagle V), Fremont Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-35649	39	29		113025	Knob Hill Mine (Knob Hill Ore Body; Knob Hill Os; Dipper Mine; Nob Hill Mine), Tallahassee Creek District, Fremont Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-67176	36.3	29.7		113028	Lantz Stone Quarry, Fremont Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-67177	36.3	29.7		113028	Lantz Stone Quarry, Fremont Co., Colorado, USA	NAVDAT	NAVDAT
NAVDAT-67181	36.3	29.7		113028	Lantz Stone Quarry, Fremont Co., Colorado, USA	NAVDAT	NAVDAT