|Northwest Africa 1929|
|Basic information||Name: Northwest Africa 1929|
This is an OFFICIAL meteorite name.
Abbreviation: NWA 1929
Observed fall: No
Year found: 2003
Mass: 922 g
This is 1 of 323 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, Howardites, and HED achondrites
|Comments:||Approved 3 Feb 2006|
Writeup from MB 90:
Northwest Africa 1929
Find: May 2003
History: A 922.2 g, partially crusted, complete stone was purchased in Erfoud, Morocco, in May 2003.
Petrography: (T. Bunch and J. Wittke, NAU ) A breccia of 72 vol% cumulate eucrite clasts, 8% subophitic clasts, 14% diogenites, and 6% melt clasts. Pervasive solid-state recrystallization of plagioclase and pyroxenes with localized melt pockets and veins in clasts.
Geochemistry: Coarse-grained gabbroic eucrite: Pyroxene (Fs45–40Wo7–20); plagioclase (An91.2–95.3); metal (Ni = 0.97; Cr = 0.87 [both wt%]). Diogenite: Pyroxene (Fs43–54Wo2.5–3.6; Fe/Mn = 36, 37).
Classification: Achondrite (howardite); high shock.
Specimens: A 22.02 g type specimen is on deposit at NAU. Farmer holds the main mass.
NAU: Geology, Bldg 12
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Farmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
|References:||Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)|
This is 1 of 1119 approved meteorites from Morocco (plus 12 unapproved names)
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