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

Monduli volcano, Monduli District, Arusha Region, Tanzaniai
Regional Level Types
Monduli volcanoVolcano
Monduli DistrictDistrict
Arusha RegionRegion
TanzaniaCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
3° 15' 0'' South , 36° 28' 59'' East
Latitude & Longitude (decimal):
-3.25000,36.48306
GRN:
S03E26
Type:
Volcano
Köppen climate type:
Aw : Tropical savanna, wet
Nearest Settlements:
PlacePopulationDistance
Monduli5,694 (2018)6.7km
Arusha341,136 (2016)25.7km
Nkoaranga14,738 (2016)36.4km
Poli9,568 (2016)36.4km
Usa River18,726 (2016)42.7km
Mindat Locality ID:
69264
Long-form identifier:
mindat:1:2:69264:6
GUID (UUID V4):
0


Quaternary volcano.

Lava contaminated with carbonatites, with spinel harzburgite xenoliths.

South portion of a rift valley.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Description: In lava.
ⓘ Calcite
Formula: CaCO3
Description: In lava :Feathery blebs and patches with resorbed rims. interstitial and rimming chromite, or round inclusions in forsterite (crystalline cumulates from carbonatitic melts) in spinel harzburgite xenoliths.
ⓘ Chromite
Formula: Fe2+Cr3+2O4
Description: In spinel harzburgite xenoliths.
ⓘ Forsterite
Formula: Mg2SiO4
Description: In lava. Primary and secondary (in calcite : calcite/forsterite intergrowths) in spinel harzburgite xenoliths.
ⓘ Hercynite
Formula: Fe2+Al2O4
Description: Primary black/brown spinel in spinel harzburgite xenoliths.
ⓘ Hercynite var. Picotite
Formula: (Fe,Mg)(Al,Cr)2O4
Description: Primary black/brown spinel in spinel harzburgite xenoliths.
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
Description: In lava.
ⓘ Spinel
Formula: MgAl2O4
Description: econdary apple green spinel, in calcite rims around chromite, in spinel harzburgite xenoliths.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘHercynite4.BB.05Fe2+Al2O4
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘSpinel4.BB.05MgAl2O4
ⓘHercynite
var. Picotite		4.BB.05(Fe,Mg)(Al,Cr)2O4
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2SiO4
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6

List of minerals for each chemical element

CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ CalciteCaCO3
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ ForsteriteMg2SiO4
Oⓘ HercyniteFe2+Al2O4
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ SpinelMgAl2O4
Oⓘ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ ForsteriteMg2SiO4
Mgⓘ SpinelMgAl2O4
Mgⓘ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
AlAluminium
Alⓘ HercyniteFe2+Al2O4
Alⓘ SpinelMgAl2O4
Alⓘ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
SiSilicon
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ ForsteriteMg2SiO4
CaCalcium
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ CalciteCaCO3
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
Crⓘ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ HercyniteFe2+Al2O4
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4

Other Regions, Features and Areas containing this locality

AfricaContinent
African Plate
Somali PlateTectonic Plate
Tanzania

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

www.getamap.net (n.d.) http://www.getamap.net/maps/tanzania/arusha/_monduli/
Lee, Cin-Ty, Rudnick, Roberta L., McDonough, William F., Horn, Ingo (2000) Petrologic and geochemical investigation of carbonates in peridotite xenoliths from northeastern Tanzania. Contributions to Mineralogy and Petrology, 139 (4) 470-484 doi:10.1007/s004100000144
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 00:07:31 Page updated: August 28, 2025 17:32:32
Go to top of page