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| Northwest Africa 13569 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 13569 This is an OFFICIAL meteorite name. Abbreviation: NWA 13569 Observed fall: No Year found: 2020 Country: Morocco Mass:  24.2 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 619 approved meteorites (plus 1 unapproved name) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 17 Dec 2020 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Northwest Africa 13569 (NWA 13569) Morocco Purchased: 2020 Classification: Carbonaceous chondrite (CV3) History: Carlos Muñecas (Expometeoritos) purchased the sample from a dealer in Guelmim, Morocco, on 20 July, 2020. Physical characteristics: Sample is irregularly shaped and dark brown, with yellowish-orange chondrules. The cut face shows the interior is composed of dispersed metal-bearing chondrules and CAIs in an opaque matrix. Petrography: Description and classification (A. Love, App) Sample shows chondritic texture composed of well-formed chondrules with an average apparent diameter of 547 µm (n=47) and CAIs set in a reddish brown matrix (~50 vol%) dominated by phyllosilicates (with low analytical totals). Metal and sulfide occurs mostly within chondrules. Glassy mesostasis is observed, but rare. Additional minerals are: calcite, troilite, chromite, phosphate. Mass magnetic susceptibility was measured using a ZH Instruments SM-30 pocket MS meter. Quadruplicate measurements of seven samples produced log χ (× 10-9 m3/kg) = 3.94. Magnetic susceptibility falls within the range measured for CV chondrites. Geochemistry: (A. Love, App) Olivine (Fa14.6±13.8, range Fa2.1-44.5, Fe/Mn=62.9±35.1, n=16); low-Ca Pyroxene (Fs17.3±0.3Wo1.6±0.1, Fe/Mn=22.3±0.5, n=10); plagioclase (An12.0±0.3Or4.8±0.7, n=5). Classification: Carbonaceous chondrite (CV3, C-S2). Sample is a carbonaceous chondrite based on the abundance of matrix and CAIs. Magnetic susceptibility and presence of metal suggests the sample is CV3 reduced. Specimens: Carlos Muñecas (Expometeoritos) holds the main mass. 3 slices weighing 4.9 g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||||
| 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:
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Statistics: This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||