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| Northwest Africa 7610 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 7610 This is an OFFICIAL meteorite name. Abbreviation: NWA 7610 Observed fall: No Year found: 2009 Country: Morocco Mass:  1086 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 69 approved meteorites classified as LL5-6. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
| Comments: | Approved 10 Dec 2012 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 101:
Northwest Africa 7610 (NWA 7610) Morocco Purchased: 2009 Classification: Ordinary chondrite (LL5-6) History: One partially crusted stone weighing 1086 g was purchased in Agadir in 2008. Greg Catterton acquired the sample from a meteorite prospector in 2009. Physical characteristics: Dark blackish-brown matte fusion crust covers approximately 75% of the stone. The fusion crust covers one side of the cubic-shaped stone and contains several moderately-developed regmaglypts Petrography: (Anthony Love, App): Sample displays brecciated structure containing chondrules and chondrule fragments and light and dark-colored clasts of various petrologic grades set within an oxidized fine-grained fragmental matrix. Clasts display weakly to totally recrystallized chondritic textures and shock-darkened and shock melted textures. Chondritic host rock contains well-defined type IIA, IIB and IIAB chondrules, rare Al-rich chondrules with chrome spinel, poikilitic olivine-pyroxene chondrules and fragments. Host chondrules have an average diameter of 0.7 mm. Porphyritic chondrules display turbid and devitrified mesostasis. Some porphyritic pyroxene chondrules contain clinoenstatite. Some chondrules display rims of FeO (relict FeNi,FeS), making them distinct from matrix. Geochemistry: (A. Love, App) Olivines Fa31.4±1.3, PMD=2.9 n=24. Pyroxenes Fs24.5Wo2.6, PMD-FeO=3.0, PMD-CaO=31.2, n=18. Plagioclase An20.6, PMD=63.9 n=13 Classification: LL5-6 Specimens: a total of 57.34 g and 4 thin sections are on deposit at App | ||||||||||||||||||||||||||||||||
| Data from: MB101 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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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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Geography:
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Statistics: This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||