header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 14 Oct 2020
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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 11458
Basic information Name: Northwest Africa 11458
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11458
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 422 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 179 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 30 Oct 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11458 (NWA 11458)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, brecciated)

Physical characteristics: Fully crusted stone. Cut surface reveals a light-gray interior with darker clasts (to 5 mm).

Petrography: (J. Gattacceca, CEREGE): Strongly brecciated igneous rock. The original texture is almost entirely obliterated by brecciation. Main minerals are orthopyroxenes, some with augite exsolution and plagioclase. Chromite, ilmenite, silica polymorph, troilite, rare metal.

Geochemistry: Pyroxenes: orthopyroxene Fs58.2±0.3Wo2.1±0.6 (N=7), augite exsolution Fs40.1Wo22.9 (N=1), FeO/MnO=37.3. Plagioclase An87.6±3.0Ab12.0±3.0Or0.3±0.1 (N=3). Magnetic susceptibility log χ (× 10-9 m3/kg) = 2.70.

Classification: Eucrite-br.

Specimens: 26 g and a polished section at CEREGE. Main mass with R. Lenssen.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):421.6
Pieces:1
Class:Eucrite-br
Weathering grade:minimal
Ferrosilite (mol%):58.2±0.3 (N=7)
Wollastonite (mol%):2.1±0.6
Magnetic suscept.:2.70
Classifier:J. Gattacceca, H. Pourkhorsandi, CEREGE
Type spec mass (g):26.3
Type spec location:CEREGE
Main mass:R. Lenssen
Comments:work name Rob2017-1; submitted by J. Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Catalogs:
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:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

Direct link to this page