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Northwest Africa 8330
Basic information Name: Northwest Africa 8330
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8330
Observed fall: No
Year found: 2014
Country: Morocco
Mass:help 676 g
Meteoritical Bulletin:  MB 103  (2014)  LL3
Recommended:  LL3    [explanation]

This is 1 of 370 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 14 Mar 2014
Writeup from MB 103:

Northwest Africa 8330 (NWA 8330)


Purchased: Jan 2014

Classification: Ordinary chondrite (LL3)

History: Purchased from a dealer in Morocco in 2014 by Aras Jonikas

Physical characteristics: One brown partially fusion crusted stone, cut surface reveals many very closely packed chondrules of various sizes and colors.

Petrography: (A. Rubin, UCLA) Microprobe examination of a polished mount shows the rock contains very sharply defined chondrules averaging about 600 μm in diameter; this is in the LL range. Chondrule textural types include PO, POP, PP, BO, C, RP. Many of the chondrules contain polysynthetically twinned low-Ca clinopyroxene phenocrysts. Small amounts of fine-grained silicate matrix material are present.

Geochemistry: Mineral compositions and geochemistry: Olivine Fa15.7±10.5 (Fa0.52-37.7, n=24), olivine Cr2O3 is 0.06±0.08 wt.%, 21% of the olivine Fa analyses are in the LL range; low-Ca pyroxene Fs7.8±4.7Wo0.8±1.2 (Fs1.9-14.0, n=13); Ca-pyx Fs22.7±1.3Wo20.5±10.5 (n=5).

Classification: Ordinary Chondrite (LL3), Cr2O3 indicates that the petrologic type is >3.2, the absence of isotropic glass suggests that the petrologic type is >3.5.

Specimens: 24.9 g type specimen including a probe mount and a 20.47 g slice on deposit at UCLA, Aras Jonikas holds the main mass

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Jan 2014
Mass (g):676
Shock stage:S1
Weathering grade:W3
Fayalite (mol%):15.7±10.5 (n=24)
Ferrosilite (mol%):7.8±4.7
Wollastonite (mol%):0.8±1.2 (n=13)
Classifier:A. Rubin, UCLA
Type spec mass (g):24.9
Type spec location:UCLA
Main mass:Aras Jonikas
Comments:AJ13-10/1868; submitted by Aras Jonikas
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 1662 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater)

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