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| Northwest Africa 2965 | |||||||||||||||||||||||||||||||||
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| 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 | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 25 approved meteorites classified as EL-melt rock. [show all] Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites | ||||||||||||||||||||||||||||||||
| Comments: |
Approved 1 Sep 2006 Revised 1 Sep 2019: Reclassified by Rubin (2016) | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 91:
Northwest Africa 2965 Algeria 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. Writeup from MB 108: Northwest Africa 2965: reclassification
Rubin (2016) reclassified Al Haggounia 001 and paired specimens as "vesicular, incompletely melted, EL chondrite impact melt rock[s]." NWA 2965 is likely paired, and is therefore also reclassified. | ||||||||||||||||||||||||||||||||
| Bibliography: |
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| Data from: MB91 Table 2 Line 134: |
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| Institutions and collections |
NAU: Geology, Bldg 12
Knoles Dr
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address) Turecki: Stan Turecki, 5618 Regis Ave., Port Richey, Florida, United States (private address; updated 28 Dec 2010) |
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| References: | Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007) Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) | ||||||||||||||||||||||||||||||||
