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Northwest Africa 13305 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13305 This is an OFFICIAL meteorite name. Abbreviation: NWA 13305 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 13.08 kg | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 31 approved meteorites classified as H7. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 31 May 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13305 (NWA 13305) (Northwest Africa) Purchased: 2018 Mar Classification: Ordinary chondrite (H7) Petrography: (K. Metzler, IfP) Ordinary chondrite with distinct recrystallization texture. Large secondary feldspar grains (many with sizes >100 μm) which frequently poikilitically enclose olivine and pyroxene grains. Some mm-sized roundish inclusions, consisting of distinctly larger olivine and pyroxene grains with interstitial plagioclase may represent chondrule relicts. Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa17.4±0.2 (Fa17.2-17.7; n=14). The mean low-Ca pyroxene composition is Fs15.3±0.3Wo2.9±0.7 (Fs14.8-17.7Wo1.3-4.0; n=15); Mean CaO concentration in low-Ca pyroxene: 1.5±0.4 (0.7-2.1) wt%. Classification: H chondrite based on mineral chemistry. Petrologic type 7 based on the equilibrated state of olivine and pyroxene, and large grain size of secondary plagioclase. Specimens: 60 g: José Antonio Sánchez Santana, Malaga, Spain | ||||||||||||||||||||||||||||||
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: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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