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Northwest Africa 1181
Basic information Name: Northwest Africa 1181
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1181
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 3.28 kg
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Howardite
Meteoritical Bulletin:  MB 86  (2002)  Eucrite-pmict
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 398 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from MB 86:

Northwest Africa 1181

Morocco

Found 2001

Achondrite (polymict eucrite)

A 3279 g, crusted stone was purchased in Rissani, in 2001. Classification and mineralogy (T. Bunch and J. Wittke, NAU): modal analyses (area of 34 cm2), eucritic basalts, 94 vol%; shock melt clasts, 4 vol%, diogenites, 2 vol%. At least 34 different eucrite clasts were observed that range from micro-ophitic/subophitic (<0.1 mm) to cumulate to very coarse-grained gabbroic (3–7 mm). Gabbro pyroxenes are predominantly 2–5 mm in size, subcalcic ferroaugites (TiO2, 0.9 to 2.1 wt%) with 3–6 mm plagioclase, An92; ilmenite, chromite (Al2O3 = 9.2 wt%), and acicular crystals of tridymite up to 7 mm in length. Shock stage, S2; weathering grade, variable, W1 to W2. Specimens: type specimen, 18.4 g and three thin sections, NAU; main mass is with the purchaser.

Data from:
  MB86
  Table 6
  Line 112:
Date:P 2001
Mass (g):3279
Pieces:1
Class:Howardite
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:
References: Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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