header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 10 Apr 2021
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:  
Northeast Africa 017
Basic information Name: Northeast Africa 017
     This is an OFFICIAL meteorite name.
Abbreviation: NEA 017
Observed fall: No
Year found: 2020
Country: Libya
Mass:help 275 g
Classification
  history:
Recommended:  Diogenite-pm    [explanation]

This is 1 of 45 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 13 Mar 2021
Writeuphelp
Writeup from MB 110:

Northeast Africa 017 (NEA 017)

Libya

Purchased: 2020 Apr

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by Mbark Arjdal in April 2020 from a Libyan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed mainly of angular diogenitic orthopyroxene grains plus some angular olivine grains and sparse lithic clasts of feldspathic diogenite (composed predominantly of orthopyroxene + anorthite) and ophitic-textured eucrite (composed predominantly exsolved pigeonite + calcic plagioclase). Low-Ti chromite and troilite are present as accessory phases.

Geochemistry: Orthopyroxene (Fs25.0-31.5Wo1.3-3.1, FeO/MnO = 27-32, N = 4), low-Ca pyroxene host (Fs41.5-44.0Wo1.6-3.3, FeO/MnO = 24-30, N = 3), augite exsolution lamellae (Fs13.4-19.7Wo40.4-43.6, FeO/MnO = 21-26, N = 3), olivine (Fa33.4-34.4, FeO/MnO = 50, N = 2), anorthite (An91.8-94.4Or0.2-0.3, N = 4).

Classification: Diogenite (polymict breccia).

Specimens: 27.1 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Libya
Date:P 2020 Apr
Mass (g):275
Pieces:1
Class:Diogenite-pm
Shock stage:low
Weathering grade:low
Fayalite (mol%):33.4-34.4
Ferrosilite (mol%):25.0-31.5; 41.5-44.0; 13.4-19.7
Wollastonite (mol%):1.3-3.1; 1.6-3.3; 40.4-43.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):27.1
Type spec location:UWB
Main mass:M. Arjdal
Finder:anonymous
Comments:Work name Arj ZM 297; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Libya
Coordinates:Unknown.

Statistics:
     This is 1 of 1515 approved meteorites from Libya (plus 22 unapproved names) (plus 2 impact craters)

Direct link to this page