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NWA 11017 Achondrite Diogenite Part Slice weighing 1.74g

£35.50

In stock

NWA 11017 Achondrite Diogenite Part Slice weighing 1.74g

 

Northwest Africa 11017
Basic informationName: Northwest Africa 11017
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11017
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 268 g
Classification
history:
Meteoritical Bulletin:MB 105  (2016)Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 44 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: AchondritesDiogenites, and HED achondrites

Comments:Approved 17 Dec 2016
Writeuphelp
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