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Northwest Africa 13573 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13573 This is an OFFICIAL meteorite name. Abbreviation: NWA 13573 Observed fall: No Year found: 2020 Country: Morocco Mass: 2.88 kg | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 9 approved meteorites classified as CVoxA3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||
Comments: |
Approved 5 Dec 2020 Revised 27 Mar 2024: Updated class per metbull text | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13573 (NWA 13573) Morocco Purchased: 2020 Classification: CVox3 History: Many samples weighing a total of 2880 g were found by a nomad in northwest Africa. These meteorites were purchased by Carlos Muñecas and Adrián Contreras in Errachidia, from Hmad Ait Hssain. Physical characteristics: Samples are dark in color, irregularly shaped, and have a partial coating of wind-ablated fusion crust. Chondrules and CAIs are visible on the cut face. Petrography: Description and classification (A. Love, App): Chondrite composed of well-defined, dispersed chondrules (average apparent diameter of 696 µm, n=40) and CAIs set w/in an opaque fine-grained matrix. Chondrules contain sulfide and oxide droplets and platy ferroan olivine. Additional minerals are: Ni-sulfide, spinel, plagioclase and apatite. Geochemistry: (A. Love, App) Olivine: Type I, Fa5.0±2.9 (Fa1.2-9.8, Fe/Mn=58.4±21.1, n=11); Type II, Fa23.0±14.7 (Fa10.1-36.8, Fe/Mn=121.6±36.0, n=4); low-Ca pyroxene, Fs1.8±1.6Wo1.3±1.2 (Fe/Mn=11.2±8.0, n=16); Ni content in sulfide is 12.9±11.1 wt% (n=14). Classification: Carbonaceous chondrite (CV3). Based on textures, and mineral compositions sample is a CV3. Based on magnetic susceptibility and Ni compositions of FeS grains sample belongs to the Ox-Allende subgroup Gattacceca et al., 2020. Specimens: Adrián Contreras and Carlos Muñecas (Expometeoritos) hold the 614 g main mass. A fragment weighing 20.3 g and polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
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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 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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