Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Ais (Ais Dome), Dâures Constituency, Erongo Region, Namibiai
Regional Level Types
Ais (Ais Dome)Dome
Dâures ConstituencyConstituency
Erongo RegionRegion
NamibiaCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearchMineralogy
08357370017272283368990.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
00274620017272283371021.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
02068620017272283373246.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
08357370017272283368990.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
00274620017272283371021.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
02068620017272283373246.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
08357370017272283368990.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
00274620017272283371021.jpg
Area view

Ais, Dâures Constituency, Erongo Region, Namibia
Latitude & Longitude (WGS84):
20° 55' 25'' South , 15° 2' 10'' East
Latitude & Longitude (decimal):
-20.92386,15.03618
GRN:
S14E10
Type:
Dome
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
187283
Long-form identifier:
mindat:1:2:187283:8
GUID (UUID V4):
0
Other/historical names associated with this locality:
Otjihorongo
Name(s) in local language(s):
(Otjihorongo Reserve)


Calcsilicate minerals near Ais (settlement) and Ais (granitic dome). Located 35km north of Uis. Previously recorded as near Otjihorongo (216 km away)
Note: 'Otjihorongo Reserve' is an older name for Otjihorongo area.

The dome consists of volcanic metarhyolites and ignimbrites of the Naupoort Formation which are overlain by biotite schists, calc silicates and marbles of the Okotjize and Orusewa Formations. The periphery of the dome is intruded by granite that contains mega-xenoliths of the country rock and these xenoliths are host to the stratabound scheelite-skarn mineralisation. ( Bezing, L. von, 2008)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


16 valid minerals.

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ 'Apatite' ?
Formula: Ca5(PO4)3A
ⓘ Calcite
Formula: CaCO3
ⓘ Clinozoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Fluorite
Formula: CaF2
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Grossular
Formula: Ca3Al2(SiO4)3
ⓘ Meionite
Formula: Ca4Al6Si6O24CO3
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ 'Plagioclase' ?
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Quartz
Formula: SiO2
ⓘ 'Scapolite'
ⓘ Scheelite
Formula: Ca(WO4)
ⓘ Titanite
Formula: CaTiO(SiO4)
ⓘ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
✪ Vesuvianite
Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Description: Brown crystals as large as 8cm enclosed in Calcite, so far these are the best crystals found in Namibia.
ⓘ Wollastonite
Formula: Ca3(Si3O9)
ⓘ Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
ⓘFluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘScheelite7.GA.05Ca(WO4)
Group 9 - Silicates
ⓘGrossular9.AD.25Ca3Al2(SiO4)3
ⓘZircon9.AD.30Zr(SiO4)
ⓘTitanite9.AG.15CaTiO(SiO4)
ⓘClinozoisite9.BG.05a(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘVesuvianite9.BG.35Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
ⓘDiopside9.DA.15CaMgSi2O6
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘTremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
ⓘWollastonite9.DG.05Ca3(Si3O9)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘMeionite9.FB.15Ca4Al6Si6O24CO3
Unclassified
ⓘ'Scapolite'-
ⓘ'Plagioclase' ?-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Apatite' ?-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hⓘ GoethiteFe3+O(OH)
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CCarbon
Cⓘ CalciteCaCO3
Cⓘ MeioniteCa4Al6Si6O24CO3
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ CalciteCaCO3
Oⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oⓘ DiopsideCaMgSi2O6
Oⓘ GoethiteFe3+O(OH)
Oⓘ GrossularCa3Al2(SiO4)3
Oⓘ MeioniteCa4Al6Si6O24CO3
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ ScheeliteCa(WO4)
Oⓘ TitaniteCaTiO(SiO4)
Oⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Oⓘ WollastoniteCa3(Si3O9)
Oⓘ ZirconZr(SiO4)
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ ApatiteCa5(PO4)3A
FFluorine
Fⓘ FluoriteCaF2
NaSodium
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mgⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
AlAluminium
Alⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alⓘ GrossularCa3Al2(SiO4)3
Alⓘ MeioniteCa4Al6Si6O24CO3
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siⓘ DiopsideCaMgSi2O6
Siⓘ GrossularCa3Al2(SiO4)3
Siⓘ MeioniteCa4Al6Si6O24CO3
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ TitaniteCaTiO(SiO4)
Siⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Siⓘ WollastoniteCa3(Si3O9)
Siⓘ ZirconZr(SiO4)
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
Pⓘ ApatiteCa5(PO4)3A
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ CalciteCaCO3
Caⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caⓘ DiopsideCaMgSi2O6
Caⓘ FluoriteCaF2
Caⓘ GrossularCa3Al2(SiO4)3
Caⓘ MeioniteCa4Al6Si6O24CO3
Caⓘ ScheeliteCa(WO4)
Caⓘ TitaniteCaTiO(SiO4)
Caⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Caⓘ WollastoniteCa3(Si3O9)
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ TitaniteCaTiO(SiO4)
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ GoethiteFe3+O(OH)
Feⓘ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
ZrZirconium
Zrⓘ ZirconZr(SiO4)
WTungsten
Wⓘ ScheeliteCa(WO4)

Other Regions, Features and Areas containing this locality

AfricaContinent
African PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

von Bezing, Ludi (2007) Namibia - Minerals and Localities (1st ed.). Bode Verlag GmbH.pp.256-257
Quick NavTopMineral ListOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: October 19, 2026 11:42:37 Page updated: July 24, 2026 01:20:57
Go to top of page