header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 30 Nov 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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 2965
Basic information Name: Northwest Africa 2965
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2965
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 100 kg
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  EL6/7
Recommended:  EL-melt rock    [explanation]

This is 1 of 15 approved meteorites classified as EL-melt rock.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites
Comments: Approved 1 Sep 2006
Revised 1 Sep 2019: Reclassified by Rubin (2016)
Writeuphelp
Writeup from MB 91:

Northwest Africa 2965

Algeria

Find: August 2004

Enstatite chondrite (EL6/7)

History and physical characteristics: Hundreds of fragments that weigh >100 kg were collected in the Algerian desert in 2004. Small fragments (~100 g) are commonly weathered to a dark brown with very dark weathering veins. Large pieces may retain portions of weathered fusion crust with only moderate to lightly weathered interiors.

Petrography: (T. Bunch and J. Wittke, NAU) A completely recrystallized enstatite chondrite with polygonal to irregular grain outlines. The grain size varies from 0.02 to 0.7 mm. Round, curved, blocky objects contain coarser-grained orthopyroxene than in the matrix. No relict chondrules were observed in ~32 cm2 that were analyzed. Metal, daubreelite, and tiny, vermicular grains of graphite are also present and constitute <3 vol%.

Mineral compositions: Orthopyroxene (Fs98.4±0.02 [sic]), plagioclase (An17.8Or4.4), troilite with Ti = 0.91, Cr = 1.10, Zn = 0.6 (all wt%).

Classification: Enstatite chondrite (EL6/7); minimal shock, variable weathering (W2–W5). It has absolutely no evidence of chondrules.

Type specimen: A 24 g sample is on deposit at NAU. Turecki and Reed hold the main mass.
NWA 2965

Polished cut surface of NWA 2965. The rock is ~8 cm in width.


Writeup from MB 108:
Northwest Africa 2965: reclassification

Rubin (2016) reclassified Al Haggounia 001 and paired specimens as "vesicular, incompletely melted, EL chondrite impact melt rock[s]." NWA 2965 is likely paired, and is therefore also reclassified.
Bibliography:
  • Rubin A.E. (2016) Impact melting of the largest known enstatite meteorite: Al Haggounia 001, a fossil EL chondrite. Meteorit. Planet. Sci. 51 1576-1587. (link)
Data from:
  MB91
  Table 2
  Line 134:
Place of purchase:Erfoud, Morocco
Date:2005
Mass (g):>100 kg
Pieces:1
Class:EL6/7
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):24
Type spec location:NAU
Main mass:Turecki
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
Turecki: Stan Turecki, 5618 Regis Ave., Port Richey, Florida, United States (private address; updated 28 Dec 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Mark Bostick      
Mike Farmer      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
André Knöfel   
Argus Rocks   
Auricular   
Bruno Caspirro   
Charley Kettel   
David Hardy   
David L. Ribeca   
Dirk Hohmann      
Edward Krikorian   
Franco Vignato   
Gerald Armstrong                     
Jean-Michel Masson   
John A. Shea   
John Tanner   
Jose Villavicencio   
Krzysztof Nowak   
MeteoriteCollector.org - RNWM - Rice Museum   
Michael S. Scherman      
Robert Zdancewicz   
Wang Ziyao      
Woreczko Jan & Wadi      
xeqtr   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

Direct link to this page