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| Chwichiya 005 | |||||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Chwichiya 005 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2019 Country: Western Sahara Mass:  249 g | ||||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 639 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 2 Aug 2020 | ||||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Chwichiya 005 27º14.39’ N, 011º 40.12’W Saguia el Hamra, Western Sahara Find: 2019 Classification: Carbonaceous chondrite (CO3) History: A single 249 g stone was found by Iken Mohamed in the Saguia el Hamra region of Western Sahara in 2019. John Higgins purchased the stone from Mohamed Elguirah in 2020. Physical characteristics: Sample is dark brown in color, has a triangular profile with a rounded convex face and a flat bottom. The convex face is weathered and shows and irregular pattern of fractures. The cut face shows abundant small chondrules in a dark brown matrix. Petrography: Description and classification (A. Love, App): Sample shows chondritic texture composed of chondrules with an average apparent diameter 208 µm (n=60), fragments mineral grains and abundant refractory inclusions, abundant sulfide and weathered metal set within a fine-grained, opaque matrix. Additional minerals are: plagioclase, Si-polymorph, troilite and oxidized FeNi metal. Geochemistry: (A. Love, App) Olivine, Fa22.5±16.0 (Fa0.9-52.0), n=18. Cr2O3 Wt% in type II chondrules - 0.4±0.2, n=15); low-Ca pyroxene, Fs4.7±3.8Wo1.2±1.0 (Fs0.7-8.2Wo0.3-1.6, n=11); pigeonite, Fs3.5-5.8Wo7.4-5.3, n=2. Classification: Carbonaceous chondrite (CO3, C-S2, W3) Based on texture, chondrule diameter and magnetic susceptibility this sample is an CO chondrite. Specimens: John Higgins holds the main mass. An end cut, several smaller slices and fragments that comprise the 23.55 g type specimen and a polished thin section and mount 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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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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| Photos: |
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Geography:
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Statistics: This is 1 of 108 approved meteorites from Saguia el Hamra, Western Sahara (plus 1 unapproved name) This is 1 of 270 approved meteorites from Western Sahara (plus 20 unapproved names) | ||||||||||||||||||||||||||||||||||||||||
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