Northwest Africa 11017 |
Basic information |
Name: Northwest Africa 11017 This is an OFFICIAL meteorite name. Abbreviation: NWA 11017 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 268 g
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Classification history: |
Recommended: |
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Diogenite-pm [explanation] | This is 1 of 28 approved meteorites classified as Diogenite-pm. [show all]
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Comments: |
Approved 17 Dec 2016 |
Writeup |
Writeup from MB 105:
Northwest Africa 11017 (NWA 11017)
(Northwest Africa)
Purchased: 2016 Jun
Classification: HED achondrite (Diogenite, polymict)
History: Purchased by Fabien Kuntz in June 2016 from a dealer in Zagora, Morocco.
Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of >90 vol.% angular grains of diogenitic orthopyroxene (of several different compositions), sparse grains of olivine, augite, chromite and calcic plagioclase, and rare lithic clasts in a finer-grained matrix of the same minerals plus troilite and stained Ni-free metal. Lithic clasts include sparse polycrystalline diogenite, quench-textured eucrite (containing elongate pigeonite crystals within glassy mesostasis) and a fine grained breccia lithology. Minor secondary barite occurs in the matrix and some calcite veinlets are present.
Geochemistry: Orthopyroxene (Fs13.8Wo4.2; Fs17.9Wo0.7; Fs 25.8Wo2.5; FeO/MnO = 25-30), augite (Fs16.4-18.7Wo42.6-42.3, FeO/MnO = 23-25), pigeonite in quenched eucrite clast (Fs41.7Wo6.7, FeO/MnO = 31). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.10.
Classification: Diogenite (polymict breccia). The wide range of Fe/Mg in diogenitic orthopyroxene is an unusual feature.
Specimens: 23.69 g including one polished thin section at PSF; remainder with Kuntz. |
Data from: MB105 Table 0 Line 0: |
Place of purchase: |
Zagora |
Date: |
P 2016 Jun |
Mass (g): |
268 |
Pieces: |
1 |
Class: |
Diogenite-pm |
Shock stage: |
low |
Weathering grade: |
low |
Fayalite (mol%): |
30.3-30.7 |
Ferrosilite (mol%): |
13.8-25.8; 41.7; 16.4-18.7 |
Wollastonite (mol%): |
0.7-4.2; 6.7; 42.6-42.3 |
Magnetic suscept.: |
3.10 |
Classifier: |
A. Irving and S. Kuehner, UWS |
Type spec mass (g): |
23.69 |
Type spec location: |
PSF |
Main mass: |
F. Kuntz |
Comments: |
K304; submitted by A. Irving | |
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) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) Kuntz: Fabien Kuntz, France; Website (private address) |