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Northwest Africa 4527
Basic information Name: Northwest Africa 4527
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4527
Observed fall: No
Year found: 2006
Country: Algeria
Mass:help 10.1 g
Classification
  history:
Meteoritical Bulletin:  MB 92  (2007)  Martian (basaltic shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 330 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 24 Jul 2007
Writeuphelp
Writeup from MB 92:

Northwest Africa 4527

Algeria

Find: Summer 2006

Achondrite (Martian, basaltic shergottite)

History: The stones wererecovered in Algeria in summer 2006 and G. Hupé purchased them in M'Hamid, Morocco in July 2006.

Physical characteristics: The meteorite consists of two broken, brown stones weighing 10.06 g. The stones have weathering rinds ~2 mm thick.

Petrography: (A. Irving and S. Kuehner, UWS) Olivine occuring with either prismatic low-Ca pyroxene phenocrysts or chromite microphenocrysts is set in a matrix of pigeonite, maskelynite, Ti-chromite, ilmenite, merrillite and pyrrhotite. Minor veinlets of calcite and barite are present.

Mineral compositions: Olivine phenocrysts are zoned from Fa19.8-22.4 cores to Fa49.2-50.9 rims (FeO/MnO = 41-56); pyroxene phenocrysts are zoned from orthopyroxene cores (Fs22.8Wo4.1, FeO/MnO = 40) to pigeonite rims (Fs40.1Wo11.9, FeO/MnO = 40); olivine microphenocrysts Fa32.7 (FeO/MnO = 51); maskelynite (An53.7-66.4Or0.7-0.1); matrix chromite is relatively Ti-rich, whereas chromite occurring as microphenocrysts and as inclusions in olivine phenocrysts is Ti-poor and Mg-rich.

Classification: Achondrite (Martian, basaltic shergottite).

Type specimens: A total of 2.1 g of sample and one thin section are on deposit at UWS. GHupé holds the main mass.

Data from:
  MB92
  Table 2
  Line 89:
Place of purchase:M'Hamid, Morocco
Date:July-2006
Mass (g):10.06
Pieces:2
Class:Martian
Type spec mass (g):2.1
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)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
The Hupe Collection         
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1402 approved meteorites from Algeria (plus 33 unapproved names) (plus 4 impact craters)

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