header
  MetSoc Home            Publications            Search Meteorites  
Search the Meteoritical Bulletin Database
Last update: 19 Jun 2017
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Aouinet Legraa
Basic information Name: Aouinet Legraa
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, probable fall
Year of probable fall: 2013
Country: Algeria
Mass:help 58 kg
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 67 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 Jun 2016
Writeuphelp
Writeup from MB 105:

Aouinet Legraa        27.120°N, 7.018°W

Tindouf, Algeria

Probable fall: 2013 July

Classification: HED achondrite (Eucrite, unbrecciated)

History: An extremely bright fireball was seen by several persons as it moved in an easterly direction over western Algeria in the vicinity of Tindouf at approximately 11 pm on July 17, 2013. No sonic phenomena were documented. Sightings were also made by residents in the Algerian village of Oum el Assel. A search for meteorites was initiated soon after the event, but it was not until April 2014 that a strewnfield was located at 27.120°N, 7.018°W. Subsequently, many fusion-crusted stones were purchased in May 2014 from the finders by Darryl Pitt.

Physical characteristics: Fresh stones coated by black fusion crust with numerous anastomozing ridges. Interiors are notable for the bright internal reflections within vitreous plagioclase laths and the unusually abundant, accessory, bronze-colored sulfides.

Petrography: (A. Irving and S. Kuehner, UWS) Two studied stones have a subophitic diabasic texture, and exhibit no evidence of deformation or terrestrial alteration. Composed of prismatic exsolved pigeonite grains and calcic plagioclase laths with accessory silica polymorph, Ti-rich chromite, Ti-poor chromite, troilite and ilmenite, plus rare zircon and Ni-free metal.

Geochemistry: Low-Ca pyroxene host (Fs57.1-58.0Wo6.2-6.7, FeO/MnO = 29-30, N = 3), high-Ca pyroxene exsolution lamellae (Fs28.1-29.3Wo42.0-41.6, FeO/MnO = 29-31, N = 3), high-Ca pyroxene host (Fs28.1Wo42.3, FeO/MnO = 31), low-Ca pyroxene exsolution lamella (Fs57.6Wo6.4, FeO/MnO = 31), plagioclase (An93.2-94.5Or0.7-0.5, N = 4). Magnetic susceptibility, log χ (× 10-9 m3/kg) = 2.95.

Classification: Eucrite (diabasic, unbrecciated).

Specimens: 43 g including two polished thin sections at UWB; 51.7 kg (including a 35.9 kg mass) with DPitt and the remainder with anonymous collectors.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Tindouf
Date:2013 July
Latitude:27.120°N
Longitude:7.018°W
Mass (g):58000
Pieces:many
Class:Eucrite-unbr
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):57.1-58.0; 28.1-29.3
Wollastonite (mol%):6.2-6.7; 42.3-41.6
Magnetic suscept.:2.95
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):43
Type spec location:UWB
Main mass:DPitt
Finder:Anonymous
Comments:MAC 43; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, in preparation (2016)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:
     Recommended::   (27° 7' 12"N, 7° 1' 5"W)

Statistics:
     This is 1 of 30 approved meteorites from Tindouf, Algeria (plus 1 impact crater)
     This is 1 of 732 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)
Proximity search:
Find nearby meteorites: enter search radius (km):
Synonyms: Northwest Africa 8419 (Provisionally named stone part of Aouinet Legraa)
NWA 8419 (Provisionally named stone part of Aouinet Legraa)

Direct link to this page