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Northwest Africa 7497 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7497 This is an OFFICIAL meteorite name. Abbreviation: NWA 7497 Observed fall: No Year found: 2012 Country: Morocco Mass: 423 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 23 Oct 2012 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 101:
Northwest Africa 7497 (NWA 7497) Morocco Purchased: Aug 2012 Classification: Ordinary chondrite (H4) History: Purchased by Adam Bates in Morocco, August 2012. Physical characteristics: Single stone, dark weathered fusion crust, saw-cut reveals abundant fine-grained metal/sulfide, many small chondrules, but some up to 3mm. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a numerous PO, POP, and PP chondrules, most with mesostasis or glass, some fine grained plagioclase, moderate oxide veining. Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa20.1±0.8, Fe/Mn=42±3, n=29; low-Ca pyroxene Fs14.2±4.2Wo1.0±0.8 Fe/Mn=25±8, n=30; high-Ca pyroxene Fs9.9Wo54.3, Fe/Mn=23. Ubiquitous troilite and kamacite, minor Cl-rich apatite. Classification: Ordinary chondrite (H4), weathering grade W2. Specimens: 21.4 g including a probe mount on deposit at UNM, Adam Bates holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB101 Table 0 Line 0: |
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Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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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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