Ages for Johannite at Gabon

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 1840Ma - 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_00000792	1840	1720		Uraninite	U	1749	Oklo Mine, Franceville, Haut-Ogooué Province, Gabon	Lancelot et al. (1975)	EPSL25_189

• Mineralization 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
  sedcu-00427	115	115			Cu	228185	N'Toum, Estuaire Province, Gabon	Cox et al. (2003)	USGSOFR03_107

• Locality age (prioritized)

• 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_0000938	613	587	Phlogopite			195918	Mabounie Nb Prospect, Moyen-Ogooué Province, Gabon	Woolley and Kjarsgaard (2008)	GSCOF5796

• 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_00000821	2200	2200		Coffinite, Uraninite		1749	Oklo Mine, Franceville, Haut-Ogooué Province, Gabon	Pearcy et al. (1994)	AG9_713
  ree-00350	1000	541				195918	Mabounie Nb Prospect, Moyen-Ogooué Province, Gabon	Orris and Grauch (2002)	USGSOFR02_189