Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Giraul Pegmatite Field, Namibe Province, Angola

Oldest recorded age at locality: 2278
Youngest recorded age at locality: 2182

mindat Locality ID: 231987
mindat URL: http://www.mindat.org/loc-231987.html

Tectonic Settings:

Total number of sublocalities beneath "Giraul Pegmatite Field, Namibe Province, Angola": 5
Total number of bottom-level sublocalities: 5

Number of Child Localities: 5
Child Localities:
Type I Pegmatites
Type II Pegmatites
Type III Pegmatites
Type IV Pegmatites
Type V Pegmatites

Latitude: 15°4'59"S
Longitude: 12°25'59"E
Decimal Degree (lat, lon): -15.083055555556,12.433055555556

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Amphibole	Beryl	Clay	Columbite	Feldspar	Garnet	Mica	None	Not in a structural group	Olivine
Pyroxene	Quartz	Tourmaline

Albite ()*	Almandine ()*	Amblygonite ()*	Beryl ()*	Columbite-(Fe) ()*
Elbaite ()*	Ferrisicklerite ()*	Heterosite ()*	Holmquistite ()*	Montebrasite ()*
Muscovite ()*	Petalite ()*	Quartz ()*	Schorl ()*	Spodumene ()*
Triphylite ()*

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al B Be F Fe H K Li Mg Mn Na Nb O P Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Beryl Clay Columbite Feldspar Garnet Mica None Not in a structural group Olivine
Pyroxene Quartz Tourmaline

16 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	2278	2182	1	1629	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	2278	2182	2	1626,1629	2353
Amblygonite ()*	None	LiAl(PO₄)F	2278	2182	1	1630	244
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	2278	2182	3	1626,1628,1629	4286
Columbite-(Fe) ()*	Columbite	Fe²⁺Nb₂O₆	2278	2182	1	1629	518
Elbaite ()*	Tourmaline	Na(Al_1.5Li_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	2278	2182	2	1629,1630	520
Ferrisicklerite ()*	Olivine	Li_1-x(Fe³⁺,Mn²⁺)(PO₄)	2278	2182	1	1629	108
Heterosite ()*	Olivine	Fe³⁺(PO₄)	2278	2182	1	1629	204
Holmquistite ()*	Amphibole	Li₂(Mg₃Al₂)Si₈O₂₂(OH)₂	2278	2182	2	1629,1630	42
Montebrasite ()*	None	LiAl(PO₄)(OH)	2278	2182	1	1629	200
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	2278	2182	2	1626,1629	17380
Petalite ()*	Not in a structural group	LiAlSi₄O₁₀	2278	2182	1	1630	124
Quartz ()*	Quartz	SiO₂	2278	2182	2	1626,1629	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	2278	2182	1	1629	2705
Spodumene ()*	Pyroxene	LiAlSi₂O₆	2278	2182	1	1630	688
Triphylite ()*	Olivine	LiFe²⁺(PO₄)	2278	2182	1	1629	313

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Alexandra-0269	2278	2182	2230 ± 48		Age of Nb-Ta mineralization									231987	Giraul Pegmatite Field, Namibe Province, Angola	Giraul pegmatite field	Melcher et al. (2015)	10.1016/j.oregeorev.2013.09.003	OGR64_667

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...