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Northwest Africa 13171
Basic information Name: Northwest Africa 13171
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13171
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 7.1 kg
Classification
  history:
Recommended:  L3    [explanation]

This is 1 of 689 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 5 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13171 (NWA 13171)

Morocco

Purchased: 2017 Jun 18

Classification: Ordinary chondrite (L3)

History: The meteorite was purchased by Bing’an Miao at the China Mineral and Gem Show (CMGS), Chenzhou, China, in 2018.

Physical characteristics: The sample, without fusion crust, has a dark-gray interior with a light-brown surface. The chondrules are clearly visible on the surface, with sizes generally from 1 mm to 3 mm, a few up to 5 mm. It is relative fresh, without visible iron rust on the surface.

Petrography: Under microscopy, the chondrules are well-defined, and they generally range from 0.1 to 3 mm, with an average of 0.74 mm, a few up to 5 mm. The chondrule types include POP, PO, PP, RP, and BO et al. Mesostasis glass is present in porphyritic chondrules. The matrix between the chondrules (12.5 vol%) is opaque and black, without any obvious recrystallization. The Fe-Ni metal, about 3.5 vol%, is dispersed in matrix as fine particles, partially surrounding chondrules. The mineral assemblage is olivine, orthopyroxene, clinopyroxene, kamacite, taenite and troilite.

Geochemistry: Mineral chemistry and geochemistry: Olivine is Fa21.9±6.2, n=13, low-Ca pyroxene is Fs19.3±7.8Wo3±0.5, n=15. Kamacite is Fe 95.4±0.8, Ni4.9±0.9, Co 0.72±0.1, N=11; Taenite is Fe 52.2±4.3, Ni 47.2±3.8, Co 0.2±0.1, N=10; Troilite is Fe 63±0.7, Ni 0.06±0.01, Co 0.11±0.01, N=22.

Classification: ordinary chondrite (L3)

Specimens: About 100 g sample and 1 polished thin section are deposited in the Institution of Meteorites and Planetary Materials Research of GUT. The main mass is held by Bing-an Miao.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Southern Provinces
Place of purchase:Chenzhou, China
Date:P 2017 Jun 18
Mass (g):7100
Pieces:1
Class:L3
Shock stage:S1
Weathering grade:W1
Fayalite (mol%):21.9±6.2 (N=13)
Ferrosilite (mol%):19.3±7.8 (N=17)
Wollastonite (mol%):3±2.9 (N=17)
Classifier:B. Miao, Z. Ban, GUT
Type spec mass (g):100
Type spec location:GUT
Main mass:Bing-an Miao
Finder:Anonymously
Comments:The name M17009 was used in Chinese conference paper before this submission.; submitted by Bingkui Miao
Institutions
   and collections
GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Bingkui Miao      
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 10 approved meteorites from South, Morocco
     This is 1 of 1448 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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