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| Mederdra | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Mederdra This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2019 Country: Mauritania Mass:  1552 g | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 6 approved meteorites classified as R4-5. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 14 Jan 2020 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Mederdra 16.8539806, -15.9293383 Trarza, Mauritania Find: 2019 July 17 Classification: Rumuruti chondrite (R4-5) History: The meteorite was found during a search for meteorites. Physical characteristics: Complete piece. It has primary fusion crust over 70% of the surface, secondary crust over 20%. The fusion crust is brown dark, thick, well preserved, and has contraction cracks. The rock measures 12 × 9.5 × 7.5 cm. It weighs 1552 g. Petrography: Breccia containing chondrules and chondrule fragments embedded in a fine-grained yellow-brown matrix. Opaque phases are chromite and FeNi-sulfides. Metallic FeNi has not been found. Low-Ca pyroxene has not been found. Geochemistry: Olivine, Fa39.2±0.8 (Fa38.1-42.2; n=20) Fe/Mn=82±1.5; pyroxene, Fs11.5±0.9Wo 45.0±1.1 (Fs10.2-12.7Wo43.7-46.6; n=15): Plagioclase: An9.7-11.1 (n=4). Classification: R4-5, S2, W3 Specimens: 20 g type specimen in UPC; 20 g J. Llorca. The remaining mass in MCM. | ||||||||||||||||||||||||||||||||||||
| Data from: MB109 Table 0 Line 0: |
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| Institutions and collections |
UPC: Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya
Diagonal 647, ed. ETSEIB, 08028 Barcelona, Spain, Spain (institutional address; updated 3 May 2015) MCM: Museo Canario de Meteoritos Las Palmas de Gran Canaria, Spain (institutional address; updated 26 Nov 2016) |
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| Catalogs: |
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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 2 approved meteorites from Trarza, Mauritania This is 1 of 195 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||||||
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