|Northwest Africa 2965|
|Basic information||Name: Northwest Africa 2965|
This is an OFFICIAL meteorite name.
Abbreviation: NWA 2965
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 100 kg
This is 1 of 2 approved meteorites classified as EL6/7. [show all]
Search for other: Enstatite chondrites (type 4-7), Enstatite-rich meteorites, EL chondrites, and Enstatite chondrites
|Comments:||Approved 1 Sep 2006|
Writeup from MB 91:
Northwest Africa 2965
Find: August 2004
Enstatite chondrite (EL6/7)
History and physical characteristics: Hundreds of fragments that weigh >100 kg were collected in the Algerian desert in 2004. Small fragments (~100 g) are commonly weathered to a dark brown with very dark weathering veins. Large pieces may retain portions of weathered fusion crust with only moderate to lightly weathered interiors.
Petrography: (T. Bunch and J. Wittke, NAU) A completely recrystallized enstatite chondrite with polygonal to irregular grain outlines. The grain size varies from 0.02 to 0.7 mm. Round, curved, blocky objects contain coarser-grained orthopyroxene than in the matrix. No relict chondrules were observed in ~32 cm2 that were analyzed. Metal, daubreelite, and tiny, vermicular grains of graphite are also present and constitute <3 vol%.
Mineral compositions: Orthopyroxene (Fs98.4±0.02 [sic]), plagioclase (An17.8Or4.4), troilite with Ti = 0.91, Cr = 1.10, Zn = 0.6 (all wt%).
Classification: Enstatite chondrite (EL6/7); minimal shock, variable weathering (W2–W5). It has absolutely no evidence of chondrules.
Type specimen: A 24 g sample is on deposit at NAU. Turecki and Reed hold the main mass.
Polished cut surface of NWA 2965. The rock is ~8 cm in width.
NAU: Northern Arizona University, Flagstaff, AZ 86011, USA; Website (institutional address)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, USA; Website (private address)
Turecki: Stan Turecki, 5618 Regis Ave., Port Richey, Florida, USA (private address; updated 28 Dec 2010)
|References:||Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)|
This is 1 of 3506 approved meteorites from (Northwest Africa) (plus 2663 unapproved names)
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