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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
Meteoritical Bulletin:  MB 112  (2024)  CV3
Recommended:  CV3    [explanation]

This is 1 of 473 approved meteorites (plus 2 unapproved names) 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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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