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La'gad
Basic information Name: La'gad
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2015
Country: Western Sahara
Mass:help 338 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 170 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 12 May 2016
Writeuphelp
Writeup from MB 105:

La’gad        27°25’32.57’’N, 8°44’35.57’’W

Saguia el Hamra, Western Sahara

Find: 2015 Mar 27

Classification: Lunar meteorite (feldspathic breccia)

History: Found by Mr. Alla about 25 km east of the village of Al-Mahbas, Western Sahara, on March 27, 2015. Purchased by Didi Moulay El Bechir in 2015.

Physical characteristics: Three identically appearing pieces, 137.56, 13.94, and 186.24 g, found together. Irregular exterior, no fusion crust. A saw cut reveals a polymict breccia with numerous fragmental light and dark clasts.

Petrography: (C. Agee, UNM) This feldspathic, polymict breccia has at least two distinct pyroxene populations: 1) ferropigeonite lithology, not in equilibrium with olivine, and 2) a relatively Mg-rich pyroxene lithology showing a Ca-enrichment continuum from low-Ca pyroxene to pigeonite to augite, and in apparent chemical equilibrium with coexisting olivine. Accessory silica, ilmenite, troilite, and iron oxide were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) Ferropigeonite Fs54.4±4.0Wo15.4±4.8, Fe/Mn=71±4, n=7; olivine Fa36.6±2.5, Fe/Mn=100±6, n=22; low-Ca pyroxene/pigeonite Fs29.5±4.0Wo12.8±5.8, Fe/Mn=57±4, n=12; augite Fs27.5±6.3Wo29.5±5.0, Fe/Mn=53±4, n=3; plagioclase An96.1±1.6, n=6; Shock melt (10 _m defocused electron beam, proxy for bulk meteorite composition): SiO2=45.8±1.2, TiO2=0.63±0.37, Al2O3=27.3±4.8, Cr2O3=0.12±0.10, MgO=5.1±3.0, FeO=6.0±2.9, MnO=0.07±0.04, CaO=15.4±1.7, NiO=0.05±0.05, Na2O=0.56±0.11, K2O=0.14±0.05 (all wt%), n=22.

Classification: Lunar (feldspathic, polymict breccia)

Specimens: 20.2 g including a probe mount on deposit at UNM, Didi Moulay El Bechir holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Saguia el Hamra
Date:2015 Mar 27
Latitude:27°25'32.57''N
Longitude:8°44'35.57''W
Mass (g):337.74
Pieces:3
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):36.6±2.5
Ferrosilite (mol%):54.4±4.0, 29.5±4.0, 27.5±6.3
Wollastonite (mol%):15.4±4.8, 12.8±5.8, 29.5±5.0
Classifier:C. Agee, UNM
Type spec mass (g):20.2
Type spec location:UNM
Main mass:Didi Moulay El Bechir
Finder:Mr. Alla
Comments:Field name AV-1; submitted by C. Agee, UNM
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
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Geography:

Western Sahara
Coordinates:
     Recommended::   (27° 25' 33"N, 8° 44' 36"W)

Statistics:
     This is 1 of 80 approved meteorites from Saguia el Hamra, Western Sahara (plus 1 unapproved name)
     This is 1 of 202 approved meteorites from Western Sahara (plus 20 unapproved names)
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Synonymshelp: La'gad 001 (First meteorite in DCA)

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