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Northwest Africa 6434 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6434 This is an OFFICIAL meteorite name. Abbreviation: NWA 6434 Observed fall: No Year found: 2009 Country: (Northwest Africa) Mass: 423 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2 approved meteorites classified as H6-an. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 6 Jun 2014 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 6434 (NWA 6434) (Northwest Africa) Purchased: 2009 Classification: H6-an History: Purchased by B. Reed in Tucson, 2009. Physical characteristics: Eight pieces, identical in appearance, with dark brown weathered exterior. Saw cut reveals fine-grained metal/sulfide set in a dark brown matrix, faint chondrules barely detectable. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount reveals an equilibrated ordinary chondrite texture, a few chondrules (up to 400 μm) with indistinct boundaries, plagioclase up to 100 μm. Numerous oxide veins; abundant kamacite and troilite; chromite present. Geochemistry: (C. Agee, N. Muttik, UNM) Olivine Fa19.2±0.2, Fe/Mn=40±2, n=7; low-Ca pyroxene Fs12.3±0.3Wo1.4±0.2, Fe/Mn=23±1, n=7; plagioclase An12.3±0.3Ab82.3±0.8Or5.4±0.8, n=4. Fs is slightly lower than the main correlation trend for Fa vs Fs for H chondrites, thus classified as H6-an (cf. Figures). Classification: Ordinary chondrite (H6, W3, S3) Specimens: 20.0 g including a probe mount on deposit at UNM, 22.8 g at PSF, Reed holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB103 Table 0 Line 0: |
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Institutions and collections |
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011) UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015) Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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