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Northwest Africa 13654 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13654 This is an OFFICIAL meteorite name. Abbreviation: NWA 13654 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 409 approved meteorites classified as LL3. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 16 Jan 2021 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13654 (NWA 13654) (Northwest Africa) Purchased: 2007 Jun Classification: Ordinary chondrite (LL3) History: Purchased from a moroccan dealer at the mineral show in Sainte-Marie-aux-Mines, France. Physical characteristics: Single subrounded stone without fusion crust. Petrography: (K. Metzler, IfP) Ordinary chondrite of low petrologic type consisting of chondrules (up to ~2 mm), chondrule fragments, troilite, very low amounts of Fe-Ni metal, and low amounts of fine-grained interchondrule matrix. The mean apparent chondrule size is 553 µm (n=380). Geochemistry: Mineral compositions and geochemistry: (K. Metzler, S. Ebert, IfP) The mean olivine composition is Fa18.2±12.3 (3.2-43.6; n=22); the mean low-Ca pyroxene composition is Fs11.0±8.4Wo1.4±1.2 (Fs1.5-30.7Wo0.2-3.9; n=24). The mean value of Cr2O3 (wt.%) in ferroan olivine and the 1-sigma standard deviation is 0.14±0.06 (n=44), similar to GRO 95544 (L3.2) and Krymka (LL3.2). Classification: LL chondrite, based on mean chondrule size and very low metal content. Estimated petrologic subtype 3.2. | ||||||||||||||||||||||||||||||
Data from: MB110 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. 110, in preparation (2021)
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Geography: |
Statistics: This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names) |