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Timbuktu
Basic information Name: Timbuktu
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2015
Country: Mali
Mass:help 5.5 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Mesosiderite-B4
Recommended:  Mesosiderite-B4    [explanation]

This is 1 of 4 approved meteorites classified as Mesosiderite-B4.   [show all]
Search for other: Class B mesosiderites, Mesosiderites, and Metal-rich meteorites
Comments: Approved 24 Sep 2016
Writeuphelp
Writeup from MB 105:

Timbuktu        16.7898, -3.0041

Gao, Mali

Find: 2015

Classification: Mesosiderite (group B4)

History: Found in 2015. Purchased in 2016 by KD Meteorites from Muhammad Sabai in Tucson who acquired from an anonymous finder in Mali. In 2015 an unusual rock was found by a resident of Timbuktu, Mali, near an old trade route north of town. He brought it home with him as an oddity. The rock was shown to Mohamed Sabai, who was visiting friends in Timbuktu, he recognized it as a meteorite, and purchased it from the finder.

Physical characteristics: Single mass with irregular, dark brown, oxidized patina. Saw cut slices reveal a matrix mixture of segregated orange-brown silicate and unoxidized metal with ~1-5 mm grain sizes, there are also scattered cm-sized green-yellow pyroxene xenocrysts, and cm-sized metal nodules. Minimal brecciation.

Petrography: (C. Agee, UNM) Silicate matrix domains in this meteorite are approximately 85% low-Ca pyroxene and 15% plagioclase. Minor minerals include augite, chromite, merrillite, silica, schreibersite, and troilite. Kamacite is the dominant metal phase with lesser amounts of taenite present.

Geochemistry: (C. Agee and M. Spilde, UNM) Low Ca-pyroxene Fs28.4±3.2Wo2.8±0.9, Fe/Mn=29±3, n=11; plagioclase An90.9±1.6, n=6.

Classification: Mesosiderite (B4), "B" based on plagioclase abundance, "4" based on low brecciation, and segregated mm-sized silicate and metal grains in matrix.

Specimens: Slices weighing 34, 54, and 104 g on deposit at UNM; KD Meteorites and M. Sabai hold the main mass.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Gao
Place of purchase:Tucson
Date:2015
Latitude:16.7898
Longitude:-3.0041
Mass (g):5500
Pieces:1
Class:Mesosiderite-B4
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):28.4±3.2
Wollastonite (mol%):2.8±0.9
Classifier:C. Agee, UNM
Type spec mass (g):191.6
Type spec location:UNM
Main mass:KD Meteorites
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Anna Morris   
KD Meteorites   
Geography:

Mali
Coordinates:
     Recommended::   (16° 47' 23"N, 3° 0' 15"W)

Statistics:
     This is 1 of 4 approved meteorites from Gao, Mali (plus 1 unapproved name)
     This is 1 of 35 approved meteorites from Mali (plus 1 unapproved name)
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