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Amgala 001
Basic information Name: Amgala 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Western Sahara
Mass:help 34.67 kg
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 318 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 30 Jul 2023
Writeuphelp
Writeup from MB 112:

Amgala 001        26.014°N, 11.020°W

Saguia el Hamra, Western Sahara

Purchased: 2022 Dec

Classification: Martian meteorite (Shergottite)

History: Multiple stones were found together in December 2022 near Meharrize. Said Muftah Bachir and Ziyao Wang bought 12 kg together from the finders, including the largest 5200 g individual; Mark Lyon acquired 19165 g from two different dealers; Aziz Habibi obtained 3500 g from another dealer.

Physical characteristics: Weathered exterior surfaces of the stones are brown with a distinctive knobby appearance. Fresh interiors are greenish-gray with darker olivine phenocrysts visible.

Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) Zoned olivine phenocrysts (up to 2 mm in length) are set in a groundmass with variable grainsize composed predominantly of prismatic, zoned clinopyroxene and lath-like maskelynite, together with accessory alkali feldspar, pyrrhotite, ulvöspinel, chromite (with variable Ti content), ilmenite, baddeleyite and chlorapatite. Thin opaque shock veins crosscut the specimen as well as secondary calcite veinlets. Olivine phenocrysts contain small patches of alteration products (red-brown in thin section).

Geochemistry: Olivine (Fa31.7-56.6, FeO/MnO = 52-55, N = 5), pigeonite (Fs27.7-48.4Wo10.4-9.8, FeO/MnO = 29-35, N = 3), subcalcic augite (Fs20.7-30.4Wo32.5-34.6, FeO/MnO = 28-32, N = 2), maskelynite (An47.4-50.5Or2.2-1.7, N = 2), alkali feldspar (Ab49.4Or34.0An16.7).

Classification: Shergottite (olivine-phyric).

Specimens: 68.3 g including one polished thin section at UWB; remainder with Mr. S. Bachir/WangZ (12 kg), Mr. M. Lyon (19165 g) and Mr. A. Habibi (3500 g).

Data from:
  MB112
  Table 0
  Line 0:
State/Prov/County:Saguia el Hamra
Place of purchase:Algeria and Morocco
Date:P 2022 Dec
Latitude:26.014°N
Longitude:11.020°W
Mass (g):34665
Pieces:many
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):31.7-56.6
Ferrosilite (mol%):27.7-48.4; 20.7-30.4
Wollastonite (mol%):8.0-10.4; 32.5-34.6
Classifier:(A. Irving, UWS, and P. Carpenter, WUSL)
Type spec mass (g):68.3
Type spec location:UWB
Main mass:M. Lyon/S. Bachir and WangZ/A. Habibi
Comments:Work name SMB-20; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Antonello Petriccione   
Cute child   
Dominik Stoeckli   
Fujun Ren      
Guchen Chen      
Ryan Upchurch   
Ziyao Wang      
Geography:

Western Sahara
Coordinates:
     Recommended::   (26° 0' 50"N, 11° 1' 12"W)

Statistics:
     This is 1 of 111 approved meteorites from Saguia el Hamra, Western Sahara (plus 1 unapproved name)
     This is 1 of 274 approved meteorites from Western Sahara (plus 20 unapproved names)
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