Northwest Africa 11258
Basic information Name: Northwest Africa 11258
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11258
Observed fall: No
Year found: 1996
Country: (Northwest Africa)
Mass:help 5 kg
Recommended:  LL(L)3    [explanation]

This is 1 of 17 approved meteorites classified as LL(L)3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 15 Jun 2017
Writeup from MB 106:

Northwest Africa 11258 (NWA 11258)

(Northwest Africa)

Purchased: 1996

Classification: Ordinary chondrite (LL(L)3)

History: Purchased by Ken Regelman in 1996 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Very closely packed, well-formed chondrules (apparent diameter 600300 μm) with little matrix.

Geochemistry: Olivine (Fa1.6-29.1, Cr2O3 in ferroan examples <0.02 wt.%, N = 7), orthopyroxene (Fs0.2-25.3Wo0.6-1.6, N = 3), clinopyroxene (Fs1.0Wo34.8; Fs22.1Wo29.8; N = 2). Magnetic susceptibility log χ ( 10-9 m3/kg) = 4.43.

Classification: Ordinary chondrite. LL(L)3. LL designation is favored based on magnetic susceptibility.

Specimens: 23 g including one polished thin section at UWB; remainder with Mr. K. Regelman.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 1996
Mass (g):5000
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):1.6-29.1
Ferrosilite (mol%):0.2-25.3
Wollastonite (mol%):0.6-1.6
Magnetic suscept.:4.43
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):23
Type spec location:UWB
Main mass:K. Regelman
Comments:Work name ARN17-6; submitted by A. Irving
   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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
ARN: Kenneth Regelman, Astronomical Research Network, 206 Bellwood Ave., Maplewood, MN 55117, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 106, in preparation (2017)