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Adam Talha
Basic information Name: Adam Talha
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2005
Country: Mauritania
Mass:help 259 g
Meteoritical Bulletin:  MB 92  (2007)  LL3.2
Recommended:  LL3.2    [explanation]

This is 1 of 21 approved meteorites classified as LL3.2.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 24 Jul 2007
Revised 4 Aug 2008: added writeup from MB93
Writeup from MB 93:

Adam Thalha [sic]                    22°59.613'N, 10°09.218'W


Find: January 28, 2005

Ordinary chondrite (LL3)

History: Annick Goueslain and Jean Luc Parodi discovered two stones in the Mauritanian Sahara while searching for meteorites.

Physical characteristics: The two fresh-looking stones are partially covered with fusion crust; their masses are 145 and 114.3 g, respectively.

Petrography: (M. Bourot-Denise, MNHN) The chondritic texture is intact, and opaques are present as nodules interspersed between chondrules; large type II chondrules are by far the most abundant among chondrules and very big (0.5->1 cm in size); white, pyroxene chondrules are especially common; in type I porphyritic chondrules, no FeO zoning is seen in olivine. Matrix in between chondrules is most of the time pervaded by a mixture of silicate-, metal-, and sulfide-forming droplets (melted material) in the vicinity of large opaque grains.

Geochemistry: Olivine (Fa10.4±12.2, range Fa0.72-39.8; CaO content up to 0.6 and Cr2O3 content up to 0.55 [both in wt%]); low-Ca pyroxene (Fs14.1±6.5, range Fs4.1-21.2).

Classification: Ordinary chondrite (LL3; estimated subtype 3.2); S4, W2.

Type specimens: A total of 21 g of sample and four polished mounts are on deposit at MNHN. In addition, MNHN holds a nearly complete stone of 120.8 g. Goueslain and Parodi hold the remaining mass.

Data from:
  Table 1
  Line 17:
State/Prov/County:Adam Talha, Mauritania (see IGN map 1/20
Mass (g):259.3
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):0.72-36.8 (10.36±12.19)
Ferrosilite (mol%):1.22-27.46 (5.36±10.86)
Magnetic suscept.:4.64
Classifier:M. Bourot-Denise, MNHNP
Type spec mass (g):21
Type spec location:MNHNP + 120.8 g
Main mass:Goueslain and Parodi
   and collections
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
MNHN: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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     Recommended::   (22° 59' 37"N, 10° 9' 13"W)

     This is 1 of 12 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 166 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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