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| Northwest Africa 7032 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 7032 This is an OFFICIAL meteorite name. Abbreviation: NWA 7032 Observed fall: No Year found: 2011 Country: Morocco Mass:  85 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 322 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 16 Dec 2011 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 100:
Northwest Africa 7032 (NWA 7032) Morocco Found: Oct 2011 Classification: Martian meteorite (Shergottite) History: A small stone was found in October 2011 in southern Morocco and purchased from a Moroccan dealer in Zagora in November 2011 by Luc Labenne. Physical characteristics: A single very fresh, irregular ellipsoidal stone (85 g) coated by black fusion crust and naturally broken on one side revealing the interior. The specimen resembles a terrestrial microgabbro, and consists of larger black, yellow-green and clear, limpid grains along with small opaque grains. Petrography: (A. Irving and S. Kuehner, UWS): Medium grained (to 0.9 mm) igneous assemblage of olivine (~40 vol.%), two types of clinopyroxene (~35 vol.%) and maskelynite (~20 vol.%), plus accessory chromite (with variable Ti contents), ilmenite, pyrrhotite and rare Mg-merrillite. Shocked plagioclase has been completely converted to maskelynite. All of the constituent minerals exhibit very limited compositional variation. Geochemistry: Olivine (Fa45.7-46.1, Fe/Mn=49-51), pigeonite (Fs26.6Wo15.7, Fe/Mn=30), subcalcic augite (Fs23.7Wo25.3, Fe/Mn=28), plagioclase (An55.2-58.5Or1.7-1.5). Oxygen isotopes (R. Tanaka, OkaU): analyses of acid-washed subsamples by laser fluorination gave, respectively δ17O = 2.681, 2.577; δ18O = 4.599, 4.423; Δ17O = 0.259, 0.248 per mil. Classification: Achondrite (Martian, shergottite). This specimen is unlike most other shergottites in being coarser grained (microgabbroic), and in containing minerals with a high degree of compositional homogeneity. Specimens: A total of 17.0 g of type material, one polished thin section and a polished mount are on deposit at UWS. The remaining material is held by Labenne. | ||||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 1582: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||
| 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) Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012) OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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| Photos: |
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Geography:
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Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
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| Revision history: |
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