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Northwest Africa 11743 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11743 This is an OFFICIAL meteorite name. Abbreviation: NWA 11743 Observed fall: No Year found: 2014 Country: Morocco Mass: 5 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 6484 approved meteorites (plus 2 unapproved names) classified as H4. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 10 Mar 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11743 (NWA 11743) Morocco Purchased: May 2014 Classification: Ordinary chondrite (H4) History: A small fragment of the studied meteorite weighting 5.0 g was purchased by I. Baziotis from a dealer in Marrakech, Morocco (May 2014). The stone was a broken fragment partly surrounded by fusion crust. A polished thin section was carefully prepared from the fragment and subsequently examined using optical microscopy to identify the texture and mineralogy. Physical characteristics: 5.0 g. 1 piece. The color of the meteorite is pale brown. Black fusion crust partly covers the sample. Red-brown oxidation is visible on the exterior surface, around metal grains on cut surfaces and within the matrix. Petrography (I. Baziotis, AUA; A. Bischoff, IfP): Textural observations of the thin section in reflected light showed a chondritic structure. It contains porphyritic and non-porphyritic chondrules, both Type I (Mg/(Mg+Fe)<90). ?he porphyritic olivine (PO) chondrules have a rounded to oval shape ranging from 300 to 350 ?m, and from 600 to 1200 ?m in size. The groundmass consists of olivine (30 vol.%), low Ca-pyroxene (20 vol.%), clinopyroxene (5 vol.%), plagioclase (5 vol.%) and rare phosphates (apatite). Also, metal-rich material has filled the cracks of the fragment (40 vol%). Shock veins were not observed. The rock matrix is brecciated. Geochemistry: Mineral Composition and Geochemistry: Coarse grained rock with euhedral to subhedral olivine with narrow compositional range (Fa18.6-19.2), embedded in a translucent feldspathic glassy mesostasis Ab87.6-82.8. Olivine Fa18.9±0.3 (n=23); Low-Ca Pyroxene Fs17.8±0.3 (n=24), Wo0.8±0.1 (n=24). Classification (I. Bazioti and A.Pantazidis, AUA): This meteorite is a H4 ordinary chondrite. Weathering stage: Minor to slighly moderate oxidation W2, with the major silicates being unaffected. Specimens: 4.94 g at NHMV. | ||||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012) NHMV: Naturhistorisches Museum, Burgring 7, 1010 Wien, Austria, Austria; Website (institutional address; updated 18 Jan 2019) AUA: Department of Natural Resources Management and Agricultural Engineering Agricultural Univ. of Athens Iera Odos 75, 11855 Athens, Greece (institutional address; updated 10 Mar 2018) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 2068 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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