MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 29 May 2023
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 4506
Basic information Name: Northwest Africa 4506
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4506
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 23.2 g
Meteoritical Bulletin:  MB 92  (2007)  Pallasite-Main gr
Recommended:  Pallasite, PMG    [explanation]

This is 1 of 54 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG.   [show all]
Search for other: Main group pallasites, Metal-rich meteorites, and Pallasites
Comments: Approved 24 Jul 2007
Revised 26 May 2009: Revised pallasite classifications
Writeup from MB 92:

Northwest Africa 4506

Northwest Africa

Find: October 2006

Pallasite (main group)

History: Michael Farmer purchased the sample in Denver, Colorado in October 2006.

Physical characteristics: The meteorite was a fragment with a total mass of 23.12 g. The exterior color of the meteorite was orange and contains numerous by dark veins, as it was mainly olivine with veins of oxidized metallic Fe-Ni.

Petrography: (D. Schrader, M. Killgore and D. Lauretta, UAz) The meteorite contains olivine, Fe, Ni-rich metal, chromite, sulfide, and FeO. The olivine (2.2 – 3.2 mm) grains are surrounded by weathered remnant metal veins.

Mineral compositions and geochemistry: (D. Schrader, M. Killgore, D. Lauretta, K. Domanik, and D. Hill at UAz) Olivine (Fo86.3-86.8; average = Fo86.5±0.2), kamacite (average Ni = 4.96±1.60 [3.47 to 7.76] and average Co= 0.86±0.04 [0.81-0.92] all wt%) and one taenite analysis (Ni = 20.75 and Co = 0.54 [both wt%]). Reliable analyses on chromite and troilite were not possible due to weathering.

Classification:Pallasite (main group).

Type specimens: A total of 8.17 g of sample is on deposit at UAz (UA2059). MFarmer holds the main mass.

Data from:
  Table 2
  Line 82:
Place of purchase:Denver, Colorado, USA
Mass (g):23.2
Type spec mass (g):8.17
   and collections
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Killgore: Marvin and Kitty Killgore, Southwest Meteorite Laboratory, P.O. Box 95, Payson, AZ 85547, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
Find references in NASA ADS:
Find references in Google Scholar:

     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

Direct link to this page