MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 17 Oct 2021
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 11099
Basic information Name: Northwest Africa 11099
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11099
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 2.69 kg
Meteoritical Bulletin:  MB 106  (2018)  LL3
Recommended:  LL3    [explanation]

This is 1 of 371 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 26 Jan 2017
Writeup from MB 106:

Northwest Africa 11099 (NWA 11099)


Purchased: 2016 Dec

Classification: Ordinary chondrite (LL3)

History: Purchased by Ke Zuokai in Dec. 2016 from a Moroccan dealer.

Physical characteristics: The meteorite has a yellow weathered surface. Chondrules and clasts ranging from white to gray are visible.

Petrography: The thin section shows numerous well-defined chondrules ranges from 0.2 to 1.2 mm. Chondrules exhibit various textures including porhyritic, granular, barred and radial texture. A glassy mesostasis is present in some PO or POP chondrules showing quenched texture. Olivine grains within chondrules often exhibit chemical zonation with Mg-rich cores and Fe-rich rims. Some Mg-rich olivine grains have overgrowth of Ca-rich pyroxene rims. Dusty olivine is present with μm-sized metalic inclusions. The matrix is fine-grained silicates and minor metal, troilite and chromite. Mineral and chondrule clasts are also present. Metallic phase accounts for ~2 vol%.

Geochemistry: Silicates are unequilibrated. Olivine Fa0-34.6 (Fa17.2±11.2,PMD=56.4%, n=44); low-Ca pyroxene Fs3.2-29.3Wo0-4.7 (Fs19.1±6.6Wo1.5±1.4, Fs PMD=26.8%, n=32); minor pigeonite Fs20.5-28.9Wo6.0-8.4 and Ca-rich pyroxene Fs7.1Wo29.9.

Classification: LL3.classification based on low metal abundance.

Data from:
  Table 0
  Line 0:
Place of purchase:Beijing China
Date:P 2016 Dec
Mass (g):2689
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.2±11.2 (n=44)
Ferrosilite (mol%):19.1±6.6 (n=32); 24.7±5.9 (n=2); 7.1 (n=1)
Wollastonite (mol%):1.5±1.4 (n=32); 7.2±1.7 (n=2); 29.9 (n=1)
Classifier:Wu Y., PMO
Type spec mass (g):41
Type spec location:PMO
Main mass:Ke Zuokai
Comments:Submitted by Hsu W.
   and collections
PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:


     This is 1 of 1680 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

Direct link to this page