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Northwest Africa 8616 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8616 This is an OFFICIAL meteorite name. Abbreviation: NWA 8616 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass: 150 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 470 approved meteorites (plus 2 unapproved names) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||
Comments: | Approved 23 Nov 2014 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 8616 (NWA 8616) (Northwest Africa) Purchased: February 2013 Classification: Carbonaceous chondrite (CV3) Physical characteristics: The studied mass of 32 g (the type specimen) shows rather large chondrules and some relatively large white inclusions Petrography: In thin section, many chondrules of various kinds (BO, PO, POP; about 1 mm in apparent diameter), fine-grained, olivine-rich aggregates and CAIs are embedded in a fine-grained, dark brown matrix (roughly 40 vol%). The matrix is quite porous and rich in olivine. Fe,Ni-rich metal and troilite are less abundant; severe weathering has replaced about 50% of the metal by terrestrial weathering products (W2-3). The shock stage is S2 due to the undulatory extinction and the lack of planar fractures in olivine. Geochemistry: Chondrule olivine: Fo94.1±5.1 (mostly Fo95-100; range: Fo75.7-99.7, n=37); mean matrix olivine: Fo45.3±2.7 (n=20); chondrule low-Ca pyroxene, En97.3±1.3 (mostly En95-98; range: En92.6-98.4Fs0.7-4.1Wo0.3-3.3, n=21). | ||||||||||||||||||||||||||||
Data from: MB103 Table 0 Line 0: |
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Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) IPGP: Institute de Physique du Globe de Paris, 1 rue Jussieu, 75252 Paris, Cedex 05, France (institutional address; updated 3 Nov 2014) Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Synonyms: |
Northwest Africa 10105 (Duplicate meteorite) NWA 10105 (Duplicate meteorite) | ||||||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
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