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Northwest Africa 13654
Basic information Name: Northwest Africa 13654
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13654
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 138 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 409 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 16 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13654 (NWA 13654)

(Northwest Africa)

Purchased: 2007 Jun

Classification: Ordinary chondrite (LL3)

History: Purchased from a moroccan dealer at the mineral show in Sainte-Marie-aux-Mines, France.

Physical characteristics: Single subrounded stone without fusion crust.

Petrography: (K. Metzler, IfP) Ordinary chondrite of low petrologic type consisting of chondrules (up to ~2 mm), chondrule fragments, troilite, very low amounts of Fe-Ni metal, and low amounts of fine-grained interchondrule matrix. The mean apparent chondrule size is 553 µm (n=380).

Geochemistry: Mineral compositions and geochemistry: (K. Metzler, S. Ebert, IfP) The mean olivine composition is Fa18.2±12.3 (3.2-43.6; n=22); the mean low-Ca pyroxene composition is Fs11.0±8.4Wo1.4±1.2 (Fs1.5-30.7Wo0.2-3.9; n=24). The mean value of Cr2O3 (wt.%) in ferroan olivine and the 1-sigma standard deviation is 0.14±0.06 (n=44), similar to GRO 95544 (L3.2) and Krymka (LL3.2).

Classification: LL chondrite, based on mean chondrule size and very low metal content. Estimated petrologic subtype 3.2.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Sainte-Marie-aux-Mines, France
Date:P 2007 Jun
Mass (g):138
Pieces:1
Class:LL3
Shock stage:C-S1
Weathering grade:W3
Fayalite (mol%):18.2±12.3
Ferrosilite (mol%):11.0±8.4
Wollastonite (mol%):1.4±1.2
Classifier:K. Metzler, S. Ebert, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:anonymous
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections		 IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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