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Northwest Africa 13567 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13567 This is an OFFICIAL meteorite name. Abbreviation: NWA 13567 Observed fall: No Year found: 2020 Country: Morocco Mass: 1980 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 9 approved meteorites classified as LL3.1. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 12 Dec 2020 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13567 (NWA 13567) Morocco Purchased: 2020 Classification: Ordinary chondrite (LL3.1) History: Carlos Muñecas (Expometeoritos) purchased the sample from a dealer in Ouarzazate, Morocco on 12 July 2020. Physical characteristics: Sample has an irregular triangular shape and is ~50% covered in a dark brown weathered fusion crust. The cut face shows the interior is composed of numerous rounded chondrules and clasts set in a fine-grained metal-bearing matrix. Petrography: Description and Classification (A. Love, App) Dominant unequilibrated chondritic host containing sparse matrix lumps and rare equilibrated and xenolithic clasts. Host contains well-defined, rimmed chondrules (average apparent diameter of 863µm, n=87) and fragments set within an opaque matrix with metal and sulfide. Additional minerals are: troilite, rare phosphates and anorthitic plagioclase. Common yellow mesostasis and low CL indicates sample is ?3.1. Geochemistry: (A. Love, App) Olivine (Fa15.7±11.0 (Fa0.3-38.6), Fe/Mn=38.5±18.6, CaO (type I chondrules) 0.2±0.2wt%, mean concentration of Cr2O3 (ferroan olivine with Fa>2) is 0.3±0.24wt% (n=23); low-Ca Pyroxene (Fs14.6±6.3Wo1.3±0.9 (Fs5.7-25.1Wo0.4-3.4), Fe/Mn=25.0±12.2, n=10). Classification: Ordinary chondrite (LL3.1 C-S2 W3). LL based on magnetic susceptibility and chondrule diameter. Based on range of Fa and mean and ? values of Cr2O3 contents within ferroan olivine, the sample is LL3.1 (Grossman and Brearley, 2005). Specimens: Carlos Muñecas (Expometeoritos) holds the main mass. A slice weighing 26.18g and 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: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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