Meteoritical Bulletin: Entry for Northwest Africa 3358

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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: 1162 g

Classification
history:

Meteoritical Bulletin:	MB 90	(2006)	H(L)3
	MB 107	(2018)	H3.10
Recommended:			H3.10 [explanation]

This is 1 of 5 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

Writeup

help

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: Fa_12.7±9.0(0.6-28.1; n=32); Low-Ca pyroxene composition: Fs_11.3±9.3(1.4-29.9); Wo_1.1±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, MAPS 55, 460-462

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Dirk Hohmann
Solar Anamnesis

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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