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Northwest Africa 13174
Basic information Name: Northwest Africa 13174
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13174
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 82.5 g
Classification
  history:
Recommended:  LL5    [explanation]

This is 1 of 3157 approved meteorites classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13174 (NWA 13174)

Mauritania

Find: 2016

Classification: Ordinary chondrite (LL5)

History: The 82.47 g fragment was found by a Bedouin guide in Mauritania in 2016. Dave Lehman and his partner acquired the sample in 2019.

Physical characteristics: Sample is ovoid in shape and has a dark brown, wind-ablated fusion crust covering approximately 60% of stone. The lower portion of the stone is covered in a thin layer of orange-colored caliche. The interior of the stone shows abundant chondrules and fragments set within a finer-grained yellowish matrix.

Petrography: Classification and Description (A. Love, App): Sample is a breccia composed of chondrules, fragments and fine-grained clasts set within a recrystallized matrix of olivine, pyroxene and secondary plagioclase crystals with an avg. length of 26 μm (n=9). Chondrules have an avg. apparent diameter 1019 μm (n=8). Additional minerals are chromite, apatite, troilite, FeNi, secondary calcite.

Geochemistry: (A. Love,  App):Olivine (Fa29.1±0.0, Fe/Mn=53.4±0.1, n=3), low-Ca pyroxene (Fs23.9±0.2Wo1.5±0.1, n=3).

Classification: Ordinary chondrite (LL5, CS-3, W1) Textures, mineral compositions and size of secondary plagioclase grains indicate this sample is an LL5.

Specimens: Dave Lehman and his partner hold the main mass. Two slices totaling 16.6 g and a polished thin section are on deposit at App.

Data from:
  MB109
  Table 0
  Line 0:
Date:2016
Mass (g):82.47
Pieces:1
Class:LL5
Shock stage:C-S3
Weathering grade:W1
Fayalite (mol%):29.1±0.0
Ferrosilite (mol%):23.9±0.2
Wollastonite (mol%):1.5±0.1
Magnetic suscept.:3.67
Classifier:A. Love, App
Type spec mass (g):16.6
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)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 145 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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