header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 14 Sep 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 7416
Basic information Name: Northwest Africa 7416
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7416
Observed fall: No
Year found: 2012
Country: Mauritania
Mass:help 19.1 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 372 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 29 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7416 (NWA 7416)

Mauritania

Found: 2011

Classification: HED achondrite (Howardite)

History: Discovered by local people in Mauritania in 2011, purchased in Nouadhibou in 2012 March.

Physical characteristics: Single 19.1 g stone nearly completely covered by black fusion crust, saw-cut surface shows breccia of fine-grained gray groundmass with pale clasts up to 6 mm and mineral fragments. Magnetic susceptibility log χ =3.32.

Petrography: Microprobe examination of a thin section shows fine-grained (0.1 mm) cataclastic groundmass with fractured fragments of pyroxene and plagioclase up to 1mm. Most pyroxenes show exsolution lamellae.

Geochemistry: Eucrite component: Ca-poor pyroxene Fs36.4-63.8Wo1.4-4.3, mean Fs68.9±9.0Wo2.5±0.8, n=14; pigeonite Fs42-48En51-34Wo7-19 (n=2); augite Fs26-39En29-31Wo44-30 (n=3); feldspar An83-96Or<1 (n=25); chromite Cr/(Cr+Al) = 78, Fe/(Fe+Mg) = 92, ilmenite. Diogenite component (~15%): Ca-poor pyroxene: Fs22.2-29.6Wo1.7-2.5, mean Fs26.1±2.9Wo2.5±0.6, n=7.

Classification: Achondrite (howardite), mixture of diogenite and eucrite lithologies.

Specimens: 4.0 g on deposit at Kiel, main mass Bart.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Nouadhibou
Date:2011
Mass (g):19.1
Pieces:1
Class:Howardite
Ferrosilite (mol%):48.0 (22.2-63.8, n=21)
Wollastonite (mol%):2.7 (1.4-4.3)
Magnetic suscept.:3.32
Classifier:Bart
Type spec mass (g):4.0
Type spec location:Kiel
Main mass:Bart
Finder:anonymous
Comments:Submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Lehmweg 53, D-38518 Gifhorn, Germany; Website (private address; updated 4 Aug 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 101 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

Direct link to this page