Ouadangou, Rare Burkina Faso 2003 Fall, Micromount

A meteorite hunter traveled in late November 2003 to Africa to recover diogenites from the new Bilanga fall. While there, he heard reports of another recent fall in a nearby area of Burkina Faso. He went there to investigate and discovered a second witnessed fall, which was classified as an L5 chondrite and was unofficially called "Batiawo" and "Lampiaiyre". For unknown reasons, this meteorite lingered in the approval system of the Meteoritical Society for many years and it disappeared from the collector market offerings. Just recently, it was finally approved by NonCom and given the name of Ouadangou (Ouadongou) - the nearest town.

I acquired a small amount of this scarcely-seen meteorite and I am offering small fragments as micromounts until my supply is exhausted. I kept a choice piece for myself and these fragments being offered here are fresh and show very little oxidation.

Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing a small fragment like the one shown. Your purchase will include a labeled gemjar for safe storage.

From the Meteoritical Bulletin entry on Ouadangou -

Ouadangou 12.9° N, 0.08° E

Gnagna, Burkina Faso

Fell: November 2003

Classification: Ordinary chondrite (L5)

History: In November of 2003, Michael Farmer traveled to Burkina Faso to purchase meteorites. During his visit he heard of a recent fall near the town of Bilanga. Mr. Farmer bought ~1.6 kg of the new fall in Bilanga, then traveled to the fall site ~40 km NNW to the villages of Batiawo and Lampiaiyre (several km SE of Oudangou). Here he purchased the remaining 2.84 kg of stones. According to the villagers of Batiawo and Lampyaire, the stones fell within the villages and surrounding bushland, during the afternoon in early November 2003, though the exact date could not be agreed upon. Several of the stones from Batiawo had been broken into pieces by villagers. The largest stone (broken into three pieces) is 2031 g.

Physical characteristics: All stones are well-rounded showing broad, poorly developed regmaglypts, and covered by a velvety fusion crust up to 0.5 mm thick. The few reddish patches on the exterior are from the local soil. Interior is primarily white, with heterogeneous distribution of gray clasts. Clasts to 5 cm, rounded, some with scalloped margins. A few large metal-troilite nodules, to 1.5 cm. Sparse shock veining. None of the stones show signs of rusting.

Petrography: (L. Garvie, ASU) Matrix largely recrystallized with disseminated plagioclase grains <50 μm,="" rarely="" to="" 200="" μm.="" scattering="" of="" distinct="" chondrules,="" some="" to="" 1="" mm,="" including="" rp,="" po,="" and="" bo.="" localized="" melting="" forming="" silicate-metal-sulfide="" pods.="" two="" 1="">2 sections show ~10 Cu grains each. Cu grains (<50 μm="" across)="" occur="" at="" metal/sulfide="" boundaries,="" and="" associated="" as="" a="" complex="" taenite-troilite-copper="" assemblage.="" troilite="" grains="" show="" a="" range="" of="" pressure="" effects="" from="" undistorted="" and="" monocrystalline,="" to="" those="" with="" undulose="" extinction="" and="" a="" few="" exhibiting="" spindle-like="" twin="" lamellae.="" chromite="" grains="" extensively="" fractured.="" range="" of="" achondritic="" clast="" types,="" from="" dark="" and="" fine-grained="" to="" light="" colored="" with="" a="" sugary="" texture.="" two="" of="" the="" light-colored="" clasts="" contain="" white="" veins.="" clasts="" largely="" metal-troilite="" free,="" medium-grained,="" some="" vuggy="" with="" euhedral="" crystals.="">

Geochemistry: Olivine Fa24.6±0.3, range 24.1 to 25.3, FeO/MnO=48.3±3.3, n=13. Two grains P-rich, with P2O5 to 0.11 wt%. Low Ca pyroxene Fs20.2±0.2, range 20.2 to 20.6, Wo1.4±0.1, range 1.2 to 1.6, n=7.

Specimens: 197 g at ASU.

  • 3 available