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:
Helikon II Pegmatite, Okongava Ost Farm 72, Karibib, Erongo Region, Namibia

Oldest recorded age at locality: 511.7
Youngest recorded age at locality: 487.7

mindat Locality ID: 107138
mindat URL: http://www.mindat.org/loc-107138.html

Tectonic Settings:

Total number of sublocalities beneath "Helikon II Pegmatite, Okongava Ost Farm 72, Karibib, Erongo Region, Namibia": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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.

Alluaudite	Amphibole	Analcime	Arrojadite	Arsenic	Beryl	Calcite	Childrenite	Clay	Columbite
Feldspar	Hureaulite	Mica	None	Not in a structural group	Olivine	Quartz	Tourmaline	Wagnerite

Actinolite ()*	Albite ()*	Amblygonite ()*	Beryl ()*	Bismuth ()*
Calcite ()*	Columbite-(Mn) ()*	Dickinsonite-(KMnNa) ()*	Elbaite ()*	Eosphorite ()*
Hectorite ()*	Hureaulite ()*	Joosteite ()*	Lithiophilite ()*	Muscovite ()*
Petalite ()*	Pollucite ()*	Quartz ()*	Sicklerite ()*	Varulite ()*

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 Bi C Ca Cs F Fe H K Li Mg Mn Na Nb O P Si

Elements from minerals reported directly at this locality: Al B Be Bi C Ca Cs F Fe H K Li Mg Mn Na Nb O P Si

Structural Groups for minerals in this locality:
Alluaudite Amphibole Analcime Arrojadite Arsenic Beryl Calcite Childrenite Clay Columbite
Feldspar Hureaulite Mica None Not in a structural group Olivine Quartz Tourmaline Wagnerite

20 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	511.7	487.7	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)	511.7	487.7	8803
Amblygonite ()*	None	LiAl(PO₄)F	511.7	487.7	244
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	511.7	487.7	4286
Bismuth ()*	Arsenic	Bi	511.7	487.7	1966
Calcite ()*	Calcite	Ca(CO₃)	511.7	487.7	27770
Columbite-(Mn) ()*	Columbite	Mn²⁺Nb₂O₆	511.7	487.7	289
Dickinsonite-(KMnNa) ()*	Arrojadite	K(NaMn)CaNa₃AlMn₁₃(PO₄)₁₂(OH)₂	511.7	487.7	26
Elbaite ()*	Tourmaline	Na(Al_1.5Li_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	511.7	487.7	520
Eosphorite ()*	Childrenite	Mn²⁺Al(PO₄)(OH)₂·H₂O	511.7	487.7	128
Hectorite ()*	Clay	Na_0.3(Mg,Li)₃Si₄O₁₀(F,OH)₂·nH₂O	511.7	487.7	19
Hureaulite ()*	Hureaulite	Mn²⁺₅(PO₃OH)₂(PO₄)₂·4H₂O	511.7	487.7	125
Joosteite ()*	Wagnerite	Mn²⁺Mn³⁺O(PO₄)	511.7	487.7	1
Lithiophilite ()*	Olivine	LiMn²⁺(PO₄)	511.7	487.7	155
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	511.7	487.7	17380
Petalite ()*	Not in a structural group	LiAlSi₄O₁₀	511.7	487.7	124
Pollucite ()*	Analcime	Cs(Si₂Al)O₆·nH₂O	511.7	487.7	140
Quartz ()*	Quartz	SiO₂	511.7	487.7	61156
Sicklerite ()*	Olivine	LiMn²⁺(PO₄)	511.7	487.7	66
Varulite ()*	Alluaudite	Na₂Mn(MnFe³⁺)(PO₄)₃	511.7	487.7	15

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Sample Num	Age from other Locality	Dated Mineral	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Alexandra-0264	508.1	502.9	505.5±2.6	U-Pb	Age of Nb-Ta mineralization	columbite-(mn)	4	Yes	Columbite-(Mn)	Ta, Nb	19876	Rubikon Mine (Rubicon Mine), Okongava Ost Farm 72, Karibib, Erongo Region, Namibia	Rubikon	Melcher et al. (2015)	10.1016/j.oregeorev.2013.09.003	OGR64_667
Alexandra-0265	508.3	503.7	506±2.3	U-Pb	Age of Nb-Ta mineralization	columbite-(mn)	4	Yes	Columbite-(Mn)	Ta, Nb	19876	Rubikon Mine (Rubicon Mine), Okongava Ost Farm 72, Karibib, Erongo Region, Namibia	Rubikon	Melcher et al. (2015)	10.1016/j.oregeorev.2013.09.003	OGR64_667
Alexandra-0266	511.7	487.7	499.7±12	U-Pb	Age of Nb-Ta mineralization	columbite-(mn)	4	Yes	Columbite-(Mn)	Ta, Nb	19876	Rubikon Mine (Rubicon Mine), Okongava Ost Farm 72, Karibib, Erongo Region, Namibia	Rubikon	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...