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Northwest Africa 13172
Basic information Name: Northwest Africa 13172
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13172
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 281 g
Classification
  history:
Meteoritical Bulletin:  MB 109  (2020)  L5
Recommended:  L5    [explanation]

This is 1 of 8890 approved meteorites (plus 5 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13172 (NWA 13172)

Bechar, Algeria

Find: 2018

Classification: Ordinary chondrite (L5)

History: A single 280.66 g fragment was found near Bechar, Algeria, by a truck driver in 2018. Dave Lehman and partner acquired the sample from this individual.

Physical characteristics: Sample is irregular-ovoid in shape and has a dark brown, wind-ablated exterior. The interior of the stone shows chondrules and fragments set within a recrystallized matrix.

Petrography: Classification and Description (A. Love, App): Sample shows recrystallized chondritic texture, composed of closely packed chondrules with an avg. apparent diameter 784 μm (n=24). Secondary plagioclase has an average size of 43 μm (n=7). Additional minerals are: troilite, apatite, chromite, weathered FeNi.

Geochemistry: (A. Love, App): Olivine (Fa25.6±0.2, Fe/Mn=43.3±1.1, n=3), low-Ca pyroxene (Fs21.4±0.2Wo1.4±0.7, n=3).

Classification: Ordinary chondrite (L5, C-S3, W3). L5 based on mineral compositions and size of secondary plagioclase.

Specimens: Dave Lehman and a partner hold the main mass. 22.3 g and a polished mount are on deposit at App.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Bechar
Date:2018
Mass (g):280.66
Pieces:1
Class:L5
Shock stage:C-S3
Weathering grade:W3
Fayalite (mol%):25.6±0.2
Ferrosilite (mol%):21.4±0.2
Wollastonite (mol%):1.4±0.7
Magnetic suscept.:4.46
Classifier:A. Love, App
Type spec mass (g):22.3
Type spec location:App
Main mass:Dave Lehman
Finder:Unknown
Comments:Submitted by Anthony Love
Institutions
   and collections		 App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 35 approved meteorites from Bechar, Algeria (plus 1 unapproved name)
     This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
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Revision
  history:
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