MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 2 Oct 2023
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:  
Noktat Addagmar
Basic information Name: Noktat Addagmar
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2006
Country: Mauritania
Mass:help 779 g
Meteoritical Bulletin:  MB 94  (2008)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3225 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 16 Dec 2008
Writeup from MB 94:

Noktat Addagmar                 25° 4209’’N, 10° 46 54’’W


Find: October or November 2006

Ordinary chondrite (LL5)

History: Two stones with a mass of 591 and 188 g, respectively (total known weight 779 g), were found by a Moroccan mineral collector (Sajid Ait Ben Chouk) near the caravansary of Noktat Addagmar after locals reported an abundance of “stones that recently fell from sky”, close to the track from Assa (Morocco) to Nouakchott (Mauritania).

Physical characteristics: The main mass is partly covered with a black fusion crust. The interior is greenish grey with slight rust haloes around metal. Porosity 8.2% based on alcohol absorption.

Petrography: (E. Gnos, MHNGE; B. Hofmann, NMBE, M. Eggimann, UBE/NMBE) Olivine Fa27.7 ± 0.6 (n = 27), pyroxene Fs23.1 ± 1.0 Wo1.6 ± 0.3. (n = 20). Shock stage is S2, some shock veins are visible, no weathering (W0). The mean diameter of chondrules is ~1 mm.

Cosmogenic radionuclides: (Patrick Weber, Particle Physics Group, Institute of Physics, University of Neuchâtel) Gamma-spectroscopy performed in December-January 2006 demonstrated the absence of short-lived radionuclides (no 22Na detected). The fall must have occurred at least several decades ago.

Classification: Ordinary chondrite (LL5), shock stage S2, no weathering (W0).

Type specimens: 22.4 g plus polished thin section at NMBE, main mass: Svend Buhl, Hamburg, Germany.

Data from:
  Table 1
  Line 6:
Longitude:10°46'54" W
Mass (g):779
Shock stage:S2
Weathering grade:W0
Fayalite (mol%):27.7
Ferrosilite (mol%):23.1
Wollastonite (mol%):1.6
Type spec mass (g):22.4
Type spec location:NMBE, E. Gnos, MHNGE; B. Hofmann, NMBE, M. Eggimann, UBE/NMBE
Main mass:SBuhl, Hamburg, Germany
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
MHNGE: Muséum d’histoire naturelle, Route de Malagnou 1, CH-1211 Genève 6 , Switzerland (institutional address; updated 27 Oct 2011)
SBuhl: Meteorite Recon (Mr. S Buhl), Muehlendamm 86, 22087 Hamburg, Germany (private address; updated 14 May 2010)
UBE: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:

     Recommended::   (25° 42' 9"N, 10° 46' 54"W)

     This is 1 of 20 approved meteorites from Tiris Zemmour, Mauritania (plus 1 impact crater)
     This is 1 of 203 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page