header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 16 Dec 2018
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 1242
Basic information Name: Northwest Africa 1242
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1242
Observed fall: No
Year found: 1985
Country: (Northwest Africa)
Mass:help 7 kg
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Mesosiderite
Meteoritical Bulletin:  MB 86  (2002)  Mesosiderite-A2
MetBase:  v. 7.1  (2006)  Mesosiderite-A2
Recommended:  Mesosiderite-A2    [explanation]

This is 1 of 4 approved meteorites classified as Mesosiderite-A2.   [show all]
Search for other: Class A mesosiderites, Mesosiderites, and Metal-rich meteorites
Writeuphelp
Writeup from MB 86:

Northwest Africa 1242

Gillio, Libya

Found 1985

Mesosiderite

Two fully ablated pieces of a mesosiderite (total known weight ~7 kg) were found near the village of Gillio by unknown oil exploration workers and put into service as bookends for 13 years. Purchased in 1998 by an anonymous dealer. Reports of a strewn field are presently unconfirmed. Classification and mineralogy (T. Bunch and J. Wittke, NAU): type 2A; contains scarce, metal nodules up to 19 mm in diameter; Mg-rich pyroxene overgrowths on Ca-pyroxene clasts; moderate resorption of plagioclase. Orthopyroxene (Fs33Wo3) replaces pigeonite (Fs34Wo8) and exsolved augite (Fs43Wo42); plagioclase (An92); pyrrhotite, chromite (Al2O3 = 8.4 wt%); kamacite, 5.8 wt% Ni; rare taenite (42 wt% Ni), silica and phosphate. Shock stage, S1; weathering grade, W0. Specimens: type specimen, 20.2 g thin section, NAU; main mass is with the anonymous purchaser.

Data from:
  MB86
  Table 6
  Line 157:
Origin or pseudonym:Libya
Date:1985
Mass (g):~7000
Pieces:2
Class:Mesosiderite
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Catalogs:
Search for this meteorite in the Natural History Museum collection (U.K.):   
    Require NHM photo
References: Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Photograph by Geoffrey Notkin © Oscar E. Monnig Meteorite Gallery   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
Dirk Hohmann   
Franco Vignato   
George Barclay                        
Gerald Armstrong   
Kamil Maciag (meteoryt)   
METEORITICON   
Mirko Graul            
Piotr gural100   
Robert Zdancewicz   
Woreczko Jan & Wadi      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6559 approved meteorites from (Northwest Africa) (plus 2021 unapproved names)
Synonymshelp: Sahara 85001 (D. Weir, pers. comm. 2009)

Direct link to this page