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Andila
Basic information Name: Andila
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2014
Country: Chad
Mass:help 500 g
Classification
  history:
Recommended:  L6    [explanation]

This is 1 of 10981 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 24 Dec 2018
Writeuphelp
Writeup from MB 107:

Andila        12.79°N, 21.20° E

Ouaddai, Chad

Confirmed fall: 2014 Aug 21

Classification: Ordinary chondrite (L6)

History: According to written report from the prefect of Abdi (Mr. Levy Dappina), on August 21, 2014, around 10 am, a series of strong detonations were heard over a distance of 70 km. Later the prefect got a phone call from the village of Andila (12 km W of Abdi) signaling that rocks fell from the sky. A police patrol went to the place and collected, the same day, a series of stones, said to have made a 10 cm hole in the soil and which produced smoke on impact. It is not clear if several individuals were collected or if the stones mentioned were fragments from a single individual. Based on the 171 g piece received by J.C. Doumnang from N’Djamena University, and a discussion with Mr. Dappina, the whole individual mass is estimated to about half a kg. The prefect later handed the stones (except the one that was brought to J.C. Doumnang for identification in 2018) to the governor of Ouaddaï, together with a report. J.C. Doumnang later brought the stone to CEREGE where it was classified.

Physical characteristics: The 171 g fragment is one-third covered with black fusion crust. Fractures reveal a homogeneous, light gray, chondrule-bearing stone with a few faint rust stains. Some troilite aggregates. The material is quite fragile due to intense fracturing.

Petrography: Recrystallized chondritic texture with average plagioclase size >50 μm, but relatively well-preserved chondrules. Main minerals are olivine, pyroxene, plagioclase, kamacite, troilite. Olivine shows sharp optical extinction. No oxidation products visible in section.

Geochemistry: Olivine Fa25.5±0.2 (N=3), orthopyroxene Fs21.8±0.1Wo1.8±0.3 (N=3).

Classification: Ordinary chondrite, L6

Specimens: 124 g fragment in N’Djamena University, type specimen (42 g) a polished section and a thin section at CEREGE.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Ouaddai
Origin or pseudonym:fields
Date:2014 Aug 21
Latitude:12.79°N
Longitude:21.20° E
Mass (g):~500
Pieces:several
Class:L6
Shock stage:S1
Weathering grade:W0
Fayalite (mol%):25.5±0.2 (N=3)
Ferrosilite (mol%):21.8±0.1 (N=3)
Wollastonite (mol%):1.8±0.3
Magnetic suscept.:4.84
Classifier:JC Doumnang (N'Djamena University), P. Rochette, B. Devouard, J. Gattacceca, CEREGE
Type spec mass (g):42
Type spec location:CEREGE
Main mass:with governor of Ouaddaï
Finder:villagers and local autorities
Comments:Submitted by Pierre Rochette
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Photos:
CreditPhotos
Public domain photographs:
Pierre Rochette   
Geography:

Chad
Coordinates:
     Recommended::   (12° 47' 24"N, 21° 12' 0"E)

Statistics:
     This is the only approved meteorite from Ouaddai, Chad
     This is 1 of 4 approved meteorites from Chad (plus 2 impact craters)
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