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| Northwest Africa 1813 | |||||||||||||||
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| Basic information | Name: Northwest Africa 1813 This is an OFFICIAL meteorite name. Abbreviation: NWA 1813 Observed fall: No Year found: 2002 Country: (Northwest Africa) Mass:  70 g | ||||||||||||||
| Classification history: |
This is 1 of 393 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||
| Writeup |
Writeup from MB 87:
Northwest Africa 1813 Western Sahara Found 2001/2002 winter Achondrite (eucrite, polymict) One stone of 70 g was found in Western Sahara. Mineralogy (C. Lorenz, Vernad): the polymict breccia consists of a number of mineral and rock fragments, embedded in a fine-grained clastic matrix. The lithic clasts are coarse- to medium-grained, poikilitic and poikilo-ophitic pyroxene-plagioclase rock clasts (~40 vol%), minor fine-grained granoblastic pyroxene-plagioclase rock clasts (~5 vol%), melt rocks and breccias. Mineral chemistry: pyroxene is En37.5Wo3.1 with lamellae of En30.5Wo42.2; feldspar is An88–92. Accessory phases are silica, chromite, ilmenite, troilite and Fe-metal. Specimens: one section and 14 g, Vernad; main mass with anonymous finder. | ||||||||||||||
| Data from: MB87 Table 8 Line 297: |
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| Institutions and collections |
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||