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Northwest Africa 13529
Basic information Name: Northwest Africa 13529
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13529
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 1690 g
Classification
  history:
Recommended:  H4    [explanation]

This is 1 of 6031 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 11 Nov 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13529 (NWA 13529)

Morocco

Purchased: 2018 Apr

Classification: Ordinary chondrite (H4)

History: Purchased in Morocco by Sergey Vasiliev and Marc Jost in April 2018.

Physical characteristics: Total mass 1690 g. The crust is gray and reddish-brown in weathered surface. The interior of the meteorite is dark gray with visible, abundant chondrules and metal particles.

Petrography: (P. Yu. Plechov, FMMR). Petrographic observation of a polished section shows that the meteorite consists of chondrules with sizes from 150 to 700 µm in an oxidized matrix. Chondrules have sharp boundaries. PO-IIA-type prevails among chondrules (also present POP-chondrules and in fewer non porphyric chondrules). Feldspar is submicrometer size in chondrule matrix. Matrix contains a lot partially oxydized of troilite and metal blebs. These features indicate that meteorite corresponds to petrologic type 4. Olivine has no undulatory extinction, there are no shock veins or melt pockets.

Geochemistry: Mineral composition and Geochemistry: EDS analyses (P. Yu. Plechov, FMMR). Olivine Fa17.6±0.3 (N=6), Low-Ca pyroxene Fs13.5±2.2Wo0.47±0.12 (N=5). Kamacite Fe 93.26 wt%, Ni 6.65 wt%, Co 0.96 wt%. Taenite (N=2) Ni 51.32 wt%, Co 0.36 wt.%. H2O 2.8±0.7 wt%, C 0.17 wt.% (CNH elemental analyzer).

Classification: (P. Yu. Plechov, FMMR). Ordinary chondrite. H4, S1, W2.

Specimens: 31 g and thin section, FMMR.

Data from:
  MB109
  Table 0
  Line 0:
Date:P 2018 Apr
Mass (g):1690
Pieces:1
Class:H4
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):17.6±0.3 (N=6)
Ferrosilite (mol%):13.5±2.2 (N=5)
Wollastonite (mol%):0.47±0.12 (N=5)
Classifier:Pavel Yu.Plechov, FMMR
Type spec mass (g):31
Type spec location:FMMR
Main mass:Sergey Vasiliev
Comments:field name is FN371 and SM1804-24; submitted by Pavel Yu. Plechov, pplechov@gmail.com
Institutions
   and collections
FMMR: Fersman Mineralogical Museum, Leninskiy prospekt 18 korpus 2, Moscow, Russia, 119071, Russia; Website (institutional address; updated 24 Feb 2018)
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:
Pavel Plechov   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1670 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater)

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