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Northwest Africa 13577 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13577 This is NOT an official name: Discredited meteorite. Abbreviation: NWA 13577 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 29.7 g | ||||||||||||||||||||||||||||
Classification history: |
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Comments: |
Entered 28 Nov 2020 Revised 18 Dec 2020: Duplicate meteorite of NWA 13262 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13577 (NWA 13577) (Northwest Africa) Purchased: 2016 Classification: Ordinary chondrite (L3) Petrography: (I. Kerraouch; A. Bischoff, IfP) Chondrules, chondrule fragments, and alteration products (mainly of metal and sulfides) are embedded in a fine-grained, brownish matrix, which has an abundance of about 10-15 vol%. The majority of chondrules are porphyritic in texture and the mean apparent chondrule size is about 500 µm. The sample is heavily weathered (W3-4). Geochemistry: (K. Klemm; A. Bischoff, IfP) Mineral compositions and geochemistry: Random measurements of olivine grains revealed Fa16.3±10.4 (Fa1.1-33.0); n=21. Random measurements of low-Ca pyroxene grains revealed Fs7.9±7.4Wo0.5±0.4 (Fs1.1-25.4Wo0.1-1.7); n=17. Classification: L3 chondrite based on the chondrule size, chondrule-matrix ratio, texture, and unequilibrated mineral chemistry. Specimens: 23.7 g, M. Zolensky, 6 g, IfP | ||||||||||||||||||||||||||||
Data from: MB109 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
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Also see: |
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Revision history: |
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