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Northwest Africa 15355
Basic information Name: Northwest Africa 15355
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15355
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 890 g
Recommended:  CV3    [explanation]

This is 1 of 624 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 19 Mar 2023
Writeup from MB 112:

Northwest Africa 15355 (NWA 15355)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CV3)

History: Purchased from Craig Zlimen in 2021 from an Algerian meteorite dealer.

Physical characteristics: Single stone with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is composed of well-defined sub-millimeter to millimeter-sized chondrules (mostly porphyritic, Av. ~1.2 mm, up to 2.5 mm, ~67 vol. %) and refractory inclusions (~1 mm, up to 2.5 mm, ~3 vol. %) set within a fine-grained Fe-rich matrix (~30 vol. %) containing accessory magnetite and FeNi metal.

Geochemistry: Olivine (Fa11.8±9.7, range Fa1.6-37.2, n=28), Low-Ca Pyroxene (Fs2.0±1.1Wo0.7±0.2, range Fs0.7-3.5Wo0.4-1.0, n=9).

Classification: Carbonaceous Chondrite (CV3) Texture, chondrule size, CAI modal abundance, and mineral chemistry favor classification as CV3. It is interesting to note that a few spot analysis of the matrix yielded relatively low totals (~82.8 wt. % totals, ~32.9 wt. % FeO, n=4), indicating the presence of hydrous phases in these regions.

Specimens: 25.9 g at Cascadia, main mass with Craig Zlimen.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):890
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):11.8±9.7
Ferrosilite (mol%):2.0±1.1
Wollastonite (mol%):0.7±0.2
Classifier:D. Sheikh, Cascadia
Type spec mass (g):25.9
Type spec location:Cascadia
Main mass:Craig Zlimen
Comments:CML 1530; submitted by Daniel Sheikh
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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