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Nani Hill, Loliondo, Ngorongoro district, Arusha Region, Tanzaniai
| Regional Level Types | |
|---|---|
| Nani Hill | Hill |
| Loliondo | Town |
| Ngorongoro district | District |
| Arusha Region | Region |
| Tanzania | Country |
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Latitude & Longitude (WGS84):
1° 57' South , 35° 42' East
Latitude & Longitude (decimal):
Type:
Deposit first discovered:
2007 (approx.)
Kรถppen climate type:
A locality for fine spessartine garnets and orange kyanite (coloured by Mn3+).
Located about 35 km NE of Loliondo proper, "in the middle of nowhere."
A village called Lemesikio is nearby (coordinates are provisionally set tot this village).
"This deposit was visited and studied by Mr. Jochen O. Hintze, German geologist. He described it as an approximate 100-meter wide quartz mass or vein with weathered detritus. The quartz is crisscrossed with veinlets of hematite. The spessartine garnets are bound to the hematite in the veinlets. Most work to date has been digging into the loose weathered material to retrieve the garnet crystals. Only a little work has been done on the intact quartz mass. (priv. comm. J. Hintze to C. Lemanski, Tucson, 2008)."
The place name is new and was assigned by the local Massai tribesmen. The spelling was graciously provided by Mr. Hintze from his field notebook. The locality (new village) is growing rapidly with the arrival of new residents responding to the "Garnet Rush."
From the 2008 G&G reference below, GIA analysis by Raman spectroscopy indicated numerous inclusions in their samples, including quartz, mica, zircon, and a black, presumably Mn-rich mineral that did not yield a spectral match in their database but was characterized as "reminiscent of Senaite
(a complex Pb oxide) previously encountered in other spessartines". A sample of black matrix was determined to be Braunite (an Mn silicate) by powder X-ray diffraction.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| โ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 References: |
| โ Dravite Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) References: |
| โ Hematite Formula: Fe2O3 References: |
| โ Kyanite Formula: Al2(SiO4)O |
| โ Muscovite Formula: KAl2(AlSi3O10)(OH)2 References: |
| โ Quartz Formula: SiO2 References: |
| โ Rutile Formula: TiO2 References: |
| โ Spessartine Formula: Mn2+3Al2(SiO4)3 |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| โ | Hematite | 4.CB.05 | Fe2O3 |
| โ | Quartz | 4.DA.05 | SiO2 |
| โ | Rutile | 4.DB.05 | TiO2 |
| Group 9 - Silicates | |||
| โ | Spessartine | 9.AD.25 | Mn2+3Al2(SiO4)3 |
| โ | Kyanite | 9.AF.15 | Al2(SiO4)O |
| โ | Dravite | 9.CK.05 | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| โ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| โ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| H | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| B | Boron | |
| B | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | Oxygen | |
| O | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | โ Hematite | Fe2O3 |
| O | โ Kyanite | Al2(SiO4)O |
| O | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | โ Quartz | SiO2 |
| O | โ Rutile | TiO2 |
| O | โ Spessartine | Mn32+Al2(SiO4)3 |
| F | Fluorine | |
| F | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Na | Sodium | |
| Na | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | Magnesium | |
| Mg | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mg | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | Aluminium | |
| Al | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | โ Kyanite | Al2(SiO4)O |
| Al | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | โ Spessartine | Mn32+Al2(SiO4)3 |
| Si | Silicon | |
| Si | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | โ Kyanite | Al2(SiO4)O |
| Si | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | โ Quartz | SiO2 |
| Si | โ Spessartine | Mn32+Al2(SiO4)3 |
| K | Potassium | |
| K | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| K | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ti | Titanium | |
| Ti | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ti | โ Rutile | TiO2 |
| Mn | Manganese | |
| Mn | โ Spessartine | Mn32+Al2(SiO4)3 |
| Fe | Iron | |
| Fe | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | โ Hematite | Fe2O3 |
Other Regions, Features and Areas containing this locality
AfricaContinent
- East African Rift System (EARS)Zone (Tectonic)
African Plate
- Congo Craton
- Tanzania CratonCraton
Kenya
- ⭔Rift Valley ProvinceProvince
Somali PlateTectonic Plate
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Nani Hill, Loliondo, Ngorongoro district, Arusha Region, Tanzania