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Northwest Africa 3358
Basic information Name: Northwest Africa 3358
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3358
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 1162 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  H(L)3
Recommended:  H3.10    [explanation]

This is 1 of 4 approved meteorites classified as H3.10.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 3 Feb 2005
Revised 8 Jun 2018: Reclassified
Writeuphelp
Writeup from MB 107:

Northwest Africa 3358 (NWA 3358) 

(Northwest Africa)

Find: 2001

Classification: Ordinary chondrite (H3.10)

History: Purchased from a Moroccan dealer at the mineral show in Sainte-Marie-aux-Mines, France.

Petrography: (K. Metzler, IfP): Unshocked ordinary chondrite of very low petrologic type, consisting of small chondrules (chemical types I and II) of all major textural types (PO, POP, PP, BO, C, Al-rich). Chondrules with sulfide rims and igneous rims were observed. Several porphyritic chondrules contain mesostasis glass. The apparent mean chondrule size is 250 μm.

Geochemistry: Olivine composition: Fa12.7±9.0 (0.6-28.1; n=32); Low-Ca pyroxene composition: Fs11.3±9.3 (1.4-29.9); Wo1.1±0.9 (0.2-4.3; n=31). Ferroan olivine in type II chondrules (EPMA): Cr2O3=0.34±0.09 wt% (n=20.) Oxygen isotope values of an acid-washed aliquot of ~1 g bulk sample (A. Pack, Univ. Göttingen): δ17O = 2.91, δ18O = 4.67, Δ17O = 0.46 (linearized, all permil).

Classification: Ordinary chondrite (H3.10). H chondrite based on small mean apparent chondrules size and high amount of metal. Petrologic type 3.10 based on the mean Cr2O3 content of olivine in type II chondrules using the nomogram of Grossman and Brearley (2005). The sigma value for Cr2O3 variation is fairly low but comparable to that for the H3.10 chondrite NWA 8061.

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB90
  Table 2
  Line 211:
Place of purchase:Sainte Marie
Date:May 2001
Mass (g):1162
Pieces:1
Class:H(L)3
Weathering grade:W2
Fayalite (mol%):13.5 ± 7
Ferrosilite (mol%):11 ± 10
Classifier:Niemeier, Jording, and A. Bischoff
Type spec mass (g):23
Type spec location:Mun
Plots: O isotopes:  
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Mun: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann   
Gerald Armstrong   
Solar Anamnesis   
Woreczko Jan & Wadi   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6506 approved meteorites from (Northwest Africa) (plus 2021 unapproved names)

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