|
Northwest Africa 13371 | |||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 13371 This is an OFFICIAL meteorite name. Abbreviation: NWA 13371 Observed fall: No Year found: 2018 Country: Morocco Mass: 24.8 g | ||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 633 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||||||||||||
Comments: | Approved 2 Aug 2020 | ||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13371 (NWA 13371) Chwichiya, Morocco Purchased: 2018 Classification: Carbonaceous chondrite (CM2) History: Sergey Vasiliev purchased 5 individuals under the name Oued Haouza (CM2) at the Munich mineral show in 2018. Physical characteristics: Samples are rounded to irregularly shaped and are partially coated in black, flow-lined and bubbled fusion crust. The interior of the samples is black with small, light-gray chondrules. Petrography: Description and Classification (A. Love, App) Sample has a brecciated chondritic texture composed of lithologies that show varying levels of alteration. The sample is composed of (vol %): chondrules (12) with average apparent diameter of 161 µm (n=146); CAI’s (8); chondrule fragments and mineral grains (3) set within a fine-grained, FeO-rich, opaque matrix (77). Dust mantles are present on a portion of chondrules. Phyllosilicates are present within chondrule mesostasis and mixed with tochilinite in portions of the matrix. FeNi metal occurs as rounded inclusions within silicates only. Additional minerals are: troilite, chromite and magnetite. Geochemistry: (A. Love, App) Olivine, Fa25.4±17.2 (Fa0.3-48.9), Cr2O3 in ferroan olivines 0.4±0.1, n=17; low-Ca pyroxene, Fs5.8±9.5Wo1.2±0.7 (Fs0.8-36.1Wo0.7-3.0, n=12). Classification: Carbonaceous chondrite (CM2) Textures, mineralogy and matrix abundance suggest this is a CM2. Presence of altered mesostasis and tochilinite-phyllosilicate intergrowths suggests CM2. Specimens: Sergey Vasiliev holds the main masses. 2 whole stones totaling 5g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||||||
Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
||||||||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
| ||||||||||||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||||||||||||
Geography: |
Statistics: This is the only approved meteorite from Chwichiya, Morocco This is 1 of 2049 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|