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Soroti meteorite, Soroti, Eastern Region, Ugandai
| Regional Level Types | |
|---|---|
| Soroti meteorite | Meteorite Fall Location |
| Soroti | District |
| Eastern Region | Region |
| Uganda | Country |
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Latitude & Longitude (WGS84):
1° 42' North , 33° 38' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Iron, Troilite-rich (I-ung, Of)
Fall 17 Dec 1945; 2.05 kg, 4 pieces
In spite of a thunderous midday entry, only 4 relatively small ragged pieces of the unusually troilite-rich meteorite were recovered within a 1-2 km of each other.
While Soroti's Fe-Ni metal (12 % Ni) is characterized by abundant kamacite, taenite, and plessite characteristic of moderately Ni-rich iron meteorites, both its irregular exterior — with abundant ablation pits — and its spongy interior have been influenced by the unusually high troilite content (~60 vol%).
Minor Schreibersite, graphite, and trace amounts of other sulfides were also found during the first examinations.
While Soroti is a witnessed fall, limonite stains in the crust are apparently due to delays in removing some pieces from local laterite soils.
In recent decades, as new techniques have been applied to this very unusual meteorite, minor amounts of native copper, chromite, phosphates, and additional sulfides have been reported.
Ungrouped irons constitute ~11% of the fully classified iron meteorites.
However, Soroti is one of only 4 witnessed I-ung falls.
The main mass (1.7 kg) is with the Geological Survey of Uganda (Entebbe).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
16 valid minerals.
Meteorite/Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Alabandite Formula: MnS |
| ⓘ Buchwaldite Formula: NaCa(PO4) |
| ⓘ Chromite Formula: Fe2+Cr3+2O4 Description: Zoned, Mg- & Al-free |
| ⓘ Daubréelite Formula: Fe2+Cr3+2S4 |
| ⓘ Djerfisherite Formula: K6(Fe,Cu,Ni)25S26Cl Description: Very minor amounts in Troilite References: |
| ⓘ Fluorapatite Formula: Ca5(PO4)3F Description: One of several small & sometimes intergrown phosphates |
| ⓘ Graphite Formula: C Description: As nodules adjacent to troilite or in the metal and surrounded by swathing kamacite |
| ⓘ Isocubanite Formula: CuFe2S3 |
| ⓘ 'Limonite' |
| ⓘ Mackinawite Formula: FeS |
| ⓘ Native Copper Formula: Cu Description: Very minor amounts in Troilite References: |
| ⓘ Native Iron Formula: Fe |
| ⓘ Native Iron var. Kamacite Formula: (Fe,Ni) |
| ⓘ Native Iron var. Martensite Formula: Fe |
| ⓘ Pentlandite Formula: (NixFey)Σ9S8 Description: Very minor amounts in Troilite References: |
| ⓘ 'Plessite' |
| ⓘ Schreibersite Formula: (Fe,Ni)3P Description: Usually as skeleton crystals and as troilite rims. |
| ⓘ Sphalerite Formula: ZnS Description: As very small inclusions with troilite or chromite References: |
| ⓘ Taenite Formula: (Fe,Ni) |
| ⓘ Troilite Formula: FeS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| ⓘ | Native Iron | 1.AE.05 | Fe |
| ⓘ | var. Kamacite | 1.AE.05 | (Fe,Ni) |
| ⓘ | var. Martensite | 1.AE.05 | Fe |
| ⓘ | Taenite | 1.AE.10 | (Fe,Ni) |
| ⓘ | Schreibersite | 1.BD.05 | (Fe,Ni)3P |
| ⓘ | Graphite | 1.CB.05a | C |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pentlandite | 2.BB.15 | (NixFey)Σ9S8 |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Isocubanite | 2.CB.55b | CuFe2S3 |
| ⓘ | Troilite | 2.CC.10 | FeS |
| ⓘ | Mackinawite | 2.CC.25 | FeS |
| ⓘ | Alabandite | 2.CD.10 | MnS |
| ⓘ | Daubréelite | 2.DA.05 | Fe2+Cr3+2S4 |
| ⓘ | Djerfisherite | 2.FC.05 | K6(Fe,Cu,Ni)25S26Cl |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Buchwaldite | 8.AD.25 | NaCa(PO4) |
| ⓘ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
| ⓘ | 'Plessite' | - | |
List of minerals for each chemical element
Other Regions, Features and Areas containing this locality
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References
evols.library.manoa.hawaii.edu (n.d.) http://evols.library.manoa.hawaii.edu/bitstream/handle/10524/35883/vol3-So-Ss(LO)pdf#page=6