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| Northwest Africa 7035 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 7035 This is an OFFICIAL meteorite name. Abbreviation: NWA 7035 Observed fall: No Year found: 2012 Country: Morocco Mass:  816 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 294 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 1 Apr 2012 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 100:
Northwest Africa 7035 (NWA 7035) (Northwest Africa), Morocco Found: Sept 2011 Classification: HED achondrite (Eucrite, monomict) History: Found in September 2011 near Zagora, Morocco, and purchased from a Moroccan dealer at the Tucson Gem and Mineral Show in January 2012 by Greg Hupé. Physical characteristics: A single, fresh, 816 g stone covered by black fusion crust (in places glossy with wrinkle ridges). The interior contains prominent yellowish-green pyroxene grains, dark-gray plagiolcase and black mesostasis regions containing vesicles. Petrography: (A. Irving and S. Kuehner, UWS) Coarse ophitic igneous texture (grains to 2.5 mm). Groups of strongly zoned clinopyroxene grains with large laths of calcic plagioclase, large grains of silica, ilmenite, iron sulfide and interstitial regions of dark, fine-grained, vesicular mesostasis (containing devitrified glass and some tiny grains of Ni-free metal). Pyroxenes contain irregular regions of pigeonite and subcalcic augite, but no exsolution lamellae are present. Ferropigeonite occurs as rims on some large pyroxene grains and in the mesostasis. Fayalite also occurs as rims on pyroxene grains and is in places intergrown with hedenbergite and silica. Geochemistry: Pigeonite (Fs39.9-41.1Wo8.2-10.0, Fe/Mn=25-29), subcalcic augite (Fs52.6Wo24.3, Fe/Mn=32), ferropigeonite (Fs80.6±0.0Wo14.1-14.2, Fe/Mn=30-31). Oxygen isotopes (R. Tanaka, OkaU): laser fluorination analyses on acid-washed subsamples gave, respectively δ17O = 1.867, 1.815; δ18O = 3.993, 3.887; Δ17O = -0.235, -0.232 per mil. Classification: Achondrite (eucrite, monomict). This specimen is unusual among ophitic-textured eucrites in having relatively coarse grained, strongly zoned pyroxenes lacking obvious exsolution lamellae. Specimens: 20.5 g of type material and one polished thin section are on deposit at UWS. The remaining material is held by GHupé. | ||||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 1585: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||
| Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address) OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:
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Statistics: This is 1 of 2 approved meteorites from (Northwest Africa), Morocco This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||