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 Opal at Bahia, Brazil

The cyan highlights indicate which age entries were selected as the "best" for assigning the mineral an age of 2500Ma - 361Ma 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
sedznpb-00055	2500	2500				8811	Boquira Mine, Boquira, Bahia, Brazil	Singer et al. (2009)	USGSOFR2009-1252
Cr-00050	380	361		Chromite, Stichtite, Volkonskoite	Cr	205487	Itambé, Bahia, Brazil	Gastil (1960)	AJS258_1

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-0298	2132	2122	Zircon			210261	Barrocas, Bahia, Brazil	Mello et al. (2006)	MD40_849
Alexandra-0299	2042	2016				210261	Barrocas, Bahia, Brazil	Mello et al. (2006)	MD40_849
Alexandra-0300	2054	2046	Muscovite		Au	191822	Fazenda Brasileiro Mine, Barrocas, Bahia, Brazil	Mello et al. (2006)	MD40_849
Alexandra-0301	2056	2052	Muscovite		Au	191822	Fazenda Brasileiro Mine, Barrocas, Bahia, Brazil	Mello et al. (2006)	MD40_849
Cr-00047	380	361		Eskolaite	Cr	205487	Itambé, Bahia, Brazil	Gastil (1960)	AJS258_1
Cr-00048	380	361		Eskolaite	Cr	205487	Itambé, Bahia, Brazil	Gastil (1960)	AJS258_1
Cr-00049	380	361		Eskolaite	Cr	205487	Itambé, Bahia, Brazil	Gastil (1960)	AJS258_1
Cr-00050	380	361		Chromite, Stichtite, Volkonskoite	Cr	205487	Itambé, Bahia, Brazil	Gastil (1960)	AJS258_1
DeepDive-Co-0057	1988	1903		Phlogopite, Pyrite, Quartz		24818	Jacobina, Serra De Jacobina, Bahia, Brazil	Milesi et al. (2002)	OGR19_95
EG105_1057_027	2000	2000			Ni,Cu,Pt,Pd,Rh,Ir,Os,Ru	238030	Santa Rita Deposit, Mirabela Farm, Ipiaú, Bahia, Brazil	Begg et al. (2010)	EG105_1057
Jen_0001075	2017	2005				277994	Angico Dos Dias Carbonatite Complex, Campo Alegre De Lourdes, Bahia, Brazil	Woolley and Kjarsgaard (2008)	GSCOF5796
Jen_0001076	352	320				277994	Angico Dos Dias Carbonatite Complex, Campo Alegre De Lourdes, Bahia, Brazil	Woolley and Kjarsgaard (2008)	GSCOF5796
Michelle_505	630	490	Muscovite			272273	Mula Claim, Tapera, Novo Horizonte, Bahia, Brazil	Menezes et al. (2017)	MMPP_10.1180minmag.2017.081.028
ree-00160	2.6	0				158019	Alcobaça, Bahia, Brazil	Orris and Grauch (2002)	USGSOFR02_189
ree-00166	2.6	0				158025	Cumuruxatiba, Bahia, Brazil	Orris and Grauch (2002)	USGSOFR02_189
ree-00174	0	0				158036	Prado, Bahia, Brazil	Orris and Grauch (2002)	USGSOFR02_189
sedznpb-00055	2500	2500				8811	Boquira Mine, Boquira, Bahia, Brazil	Singer et al. (2009)	USGSOFR2009-1252

Locality age (remote)

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-0434	520	480				69153	Jocão Pegmatite (Gypsy Mine; Cigana Claim), Conselheiro Pena, Minas Gerais, Brazil	Pedrosa-Soares et al. (2011)	GSSP350_25