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 Hematite at Franceville, Haut-Ogooué Province, Gabon

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 2200Ma - 1720Ma 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_00000821	2200	2200		Coffinite, Uraninite		1749	Oklo Mine, Franceville, Haut-Ogooué Province, Gabon	Pearcy et al. (1994)	AG9_713
Giersdorf_00000792	1840	1720		Uraninite	U	1749	Oklo Mine, Franceville, Haut-Ogooué Province, Gabon	Lancelot et al. (1975)	EPSL25_189

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
Giersdorf_00000792	1840	1720		Uraninite	U	1749	Oklo Mine, Franceville, Haut-Ogooué Province, Gabon	Lancelot et al. (1975)	EPSL25_189
Giersdorf_00000821	2200	2200		Coffinite, Uraninite		1749	Oklo Mine, Franceville, Haut-Ogooué Province, Gabon	Pearcy et al. (1994)	AG9_713