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Northwest Africa 5509
Basic information Name: Northwest Africa 5509
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5509
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass:help 190 g
Classification
  history:
Recommended:  LL(L)3    [explanation]

This is 1 of 26 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 24 Aug 2024
Writeuphelp
Writeup from MB 113:

Northwest Africa 5509 (NWA 5509)

(Northwest Africa)

Purchased: 2008 Nov

Classification: Ordinary chondrite (LL(L)3)

History: Purchased by Marcin Cimala in November 2008 from a Moroccan dealer.

Petrography: (A. Irving, UWS, and J. Boesenberg, BrownU) Well-defined unequilibrated chondrules (apparent diameter 930±550 µm, N = 26) containing devitrified glass are set in a sparse matrix containing kamacite (stained by secondary Fe oxides), troilite, and chromite.

Geochemistry: Olivine (Fa15.2±12.3, range Fa1.0-40.5, N = 12; Cr2O3 in ferroan olivine 0.01-0.58 wt.%, mean 0.09±0.13 wt.%, N = 25), low-Ca pyroxene (Fs17.6±8.0Wo1.5±1.0, range Fs3.5-25.7Wo0.2-3.7, N = 17). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.38.

Classification: Ordinary chondrite LL(L)3. LL(L) designation based on the intermediate properties, with silicate composition favoring L, but magnetic susceptibility favoring LL.

Specimens: 20.2 g including one polished thin section at YPMNH; remainder with Mr. M. Cimala.

Data from:
  MB113
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2008 Nov
Mass (g):190
Pieces:1
Class:LL(L)3
Shock stage:S2
Weathering grade:W0/1
Fayalite (mol%):15.2±12.3
Ferrosilite (mol%):17.6±8.0
Wollastonite (mol%):1.5±1.0
Magnetic suscept.:4.38
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):20.2
Type spec location:YPMNH
Main mass:M. Cimala
Comments:Work names TB1262 and MC061; submitted by A. Irving
Institutions
   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)
YPMNH: Yale University Peabody Museum of Natural History P.O. Box 208118 New Haven, CT 06520-8118 , United States; Website (institutional address; updated 30 Aug 2014)
BrownU: Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 21 Jul 2024)
Catalogs:
References: Published in Meteoritical Bulletin, no. 113, in preparation (2024)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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