Soroti meteorite, Teso District, Eastern Region, Uganda
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|Latitude & Longitude (WGS84):||1° 42' North , 33° 38' East|
|Latitude & Longitude (decimal):||1.70000,33.63333|
|Non-native locality type:||Meteorite|
|Meteorite Class:||Ungrouped iron meteorite|
|Meteoritical Society Class:||Iron, ungrouped|
|Metbull:||View entry in Meteoritical Bulletin Database|
|Köppen climate type:||Aw : Tropical savanna, wet|
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).
16 valid minerals.
Meteorite/Rock Types Recorded
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Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam, London: New York. 245 pages.
Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Kracher, A. & Kurat, G. (1979) Soroti - A Meteorite with a Metal/Sulfide Cotectic Composition (abstract): Meteoritics 14 (4): p. 461. (Dec 1979)
Kracher, A., Gramstad, S. D. & Kurat, G. (1998) Soroti and the Origin of Sulfide-rich Meteorites (abstract): Meteoritics & Planetary Science 33 (4, Supplement): pp. A88-A89 (July 1998)
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.