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| Northwest Africa 10787 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 10787 This is an OFFICIAL meteorite name. Abbreviation: NWA 10787 Observed fall: No Year found: 2015 Country: (Northwest Africa) Mass:  1031 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 12 approved meteorites (plus 1 unapproved name) classified as H4-melt breccia. [show all] Search for other: H chondrites, H chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
| Comments: | Approved 17 Dec 2016 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 105:
Northwest Africa 10787 (NWA 10787) (Northwest Africa) Purchased: Oct 2015 Classification: Ordinary chondrite (H4, melt breccia) History: Collected by nomads in Western Sahara and purchased by Compagnucci at the Torino Mineral Fair in October 2015 from a Moroccan dealer. Physical characteristics: Single stone, dark brown crust. The sawn surface shows a black matrix with scattered metal spots and shock-melted veins. Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) The thin polished section displays a brecciated texture with chondritic clasts in a melted matrix; the clasts show several chondrules of various types (mostly RP, PP and C) ranging in size from 200 to 600 μm in diameter within a dark, very fine-grained black matrix. The matrix contains scattered grains of metal and rounded troilite blebs. Shock stages are S3 for clasts and S5 for matrix. Geochemistry: EMP (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Olivine (Fa18.3±1.1, Fe/Mn=41±7, n=6; PMD=2.3); low-Ca pyroxene (Fs19.4±5.2En79.9±5.6Wo0.7±0.3; Fe/Mn=27±6, n=6; PMD=10.9); diopside (Fs15.5En60.3Wo24.2; 1.3 Al2O3, 1.2 Cr2O3, 0.7 MnO, all wt. %); Oxygen isotopes: (I.Franchi, R.Greenwood, OU) δ17O = 3.15 ‰, δ18O = 4.42 ‰, Δ17O = 0.85 ‰. Classification: Ordinary chondrite (H4-melt breccia); S3; W1. Specimens: A total of 48.7 g specimen and one thin section are on deposit at MSN-FI. Compagnucci holds the main mass. | ||||||||||||||||||||||||||||||
| Data from: MB105 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||
| Institutions and collections |
OU: Planetary and Space Sciences
Department of Physical Sciences
The Open University
Walton Hall
Milton Keynes
MK7 6AA
United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011) MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022) UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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| Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||||||||||||||
| Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
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| Revision history: |
This lists important revisions made to data for this record.
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