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Northwest Africa 10045
Basic information Name: Northwest Africa 10045
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10045
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 74.8 g
Meteoritical Bulletin:  MB 104  (2015)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 427 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 7 Apr 2015
Writeup from MB 104:

Northwest Africa 10045 (NWA 10045)

(Northwest Africa)

Purchased: January 2015

Classification: HED achondrite (Howardite)

History: Purchased in New York City from a Moroccan dealer.

Physical characteristics: One piece. A sawn surface shows many fragmental clasts, some up to 3 mm, set in a light-gray groundmass. There are many sulfide and metal grains throughout the groundmass.

Petrography: (C. Agee, UNM) This howardite consists of three lithologies, one is an equilibrated basaltic eucrite with exsolution pyroxenes (~50%), the second is a unequilibrated basaltic eucrite with zoned pyroxenes (~20%), and the third is an olivine-bearing diogenite (~30%). This is a breccia with single-crystal fragments as well as lithic fragments set in a fine-grained cataclastic groundmass. Accessory phases include kamacite, Fe-metal with trace amounts of nickel, oxidized iron, ilmenite, troilite, chromite, and silica.

Geochemistry: (C. Agee and N. Muttik, UNM) Equilibrated eucrite low-Ca pyroxene Fs56.4±2.0Wo6.2±0.9, Fe/Mn=31±1, n=3; equilbrated eucrite augite/pigeonite Fs35.9±10.8Wo32.3±11.4, Fe/Mn=32±4, n=4; unequilibrated eucrite low-Ca pyroxene Fs40.8±6.1Wo3.7±1.9, Fe/Mn=29±2, n=3; diogenite low-Ca pyroxene Fs26.0±3.0Wo2.9±1.1, Fe/Mn=30±1, n=5; diogenite olivine Fa36.7±2.4, Fe/Mn=53±1, n=9; plagioclase An93.0±1.6, n=3.

Classification: Howardite

Specimens: 15.3 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:New York City
Date:P January 2015
Mass (g):74.8
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):36.7±2.4
Ferrosilite (mol%):56.4±2.0, 40.8±6.1, 26.0±3.0
Wollastonite (mol%):6.2±0.9, 3.7±1.9, 2.9±1.1
Classifier:C. Agee, UNM
Type spec mass (g):15.3
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MAC 109; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8744 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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