Meteorite Collection > Gujba
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Gujba A conical meteorite fell in a corn field near the village of
Bogga Dingare after a bright fireball was witnessed moving west
to east and an explosion was heard. The local people hammered
the meteorite into many pieces, and most of the material was dispersed.
The original mass is unknown, although secondhand reports indicate
that it had a volume of ~20 000 cm3, and thus a mass of ~100 kg.
Material that almost certainly came from this fall has been sold
in the last few years elsewhere in Nigeria, with claims that the
specimens were new finds. A preliminary description of the meteorite
appears in Islam and Ostaficzuk (1988). Description (L. Karwowski,
USil, based on the original mass): contains metal nodules, 1.5–8
mm in diameter, and silicate nodules 1–15 mm in diameter
with fan-like aggregates of pyroxene; 60% of nodules are metal.
Description and classification (A. Rubin and G. Kallemeyn, UCLA,
based on a 282 g fragment purchased in 2000 near the village of
Gidan Wire in Kaduna state): consists of large metal nodules containing
variable amounts of troilite, and cryptocrystalline silicate spheroids;
silicates include pyroxene (Fs1–2Wo1–3) and rare olivine
(Fa3); siderophile abundance pattern in metal is similar to that
of Bencubbin; shock stage, S2; weathering grade, W0. Oxygen isotopes
(R. Clayton, UChi): light-colored silicates, d17O = –2.19·,
d18O = +0.53·; dark-colored silicates, d17O = –1.78·,
d18O = +0.98·. Specimens: 12.2 kg, mostly disintegrated,
UMaid; 815 g, MZ; type specimen, 64 g, UCLA; remainder of 282
g mass, Twelker. |
In Collection : 12.7 grams slice