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 10999
Basic information Name: Northwest Africa 10999
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10999
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 1549 g
Meteoritical Bulletin:  MB 105  (2016)  H5
Recommended:  H5    [explanation]

This is 1 of 10308 approved meteorites (plus 45 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 3 Dec 2016
Writeup from MB 105:

Northwest Africa 10999 (NWA 10999)


Purchased: 2015 April

Classification: Ordinary chondrite (H5)

History: Specimen was purchased in April 2015 in Morocco by S. Tutorow, who holds the main mass.

Physical characteristics: The surface of the stone is moderately weathered and dark red to brown. There is no fusion crust.

Petrography: (L. Pagé, UOtt) The stone is matrix poor (15 vol.%) and chondrule rich (75 vol.%), with an overall recrystallized texture. Some chondrules can be discerned, but many have poorly-defined edges. Chondrules range in size (0.1-1.0 mm), with an average of 0.4 mm. Chondrule types include BO, RP and POP. Mesostasis is recrystallized to plagioclase. Some metal and sulfides (~30%) are oxidized.

Geochemistry: (EPMA) Olivine Fa17.7±0.7 (n=27). Low-Ca pyroxene Fs15.3±0.6Wo1.6±2.1 (n=22). Plagioclase An16.4±14.2 (n=12). Cl-apatite (EDS, wt%): Ca=42.5, O=33.1, P=19.1, Cl=5.3. Kamacite (EDS, wt%): Fe=92.8, Ni=7.2. Troilite (EDS, wt%): Fe=64.3, S=35.7.

Specimens: 39.8 g including a polished moutn and thin section at UWO. The remaining mass is with S. Tutorow.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 April
Mass (g):1549
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.5±0.7 (n=27)
Ferrosilite (mol%):15.3±0.6 (n=22)
Wollastonite (mol%):1.6±2.1 (n=22)
Classifier:L. Pagé, UOtt
Type spec mass (g):39.8
Type spec location:UWO
Main mass:S. Tutorow
Comments:Field name G668.; submitted by A. Bouvier
   and collections
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
UOtt: University of Ottawa Ottawa, ON K1N 6N5, Canada (institutional address; updated 3 Dec 2016)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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