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Northwest Africa 15803
Basic information Name: Northwest Africa 15803
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15803
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 288 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  CVred3
Recommended:  CVred3    [explanation]

This is 1 of 49 approved meteorites classified as CVred3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 19 Mar 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15803 (NWA 15803)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CVred3)

History: Acquired online by Pat Brown from Matthew Stream in 2021.

Physical characteristics: Single stone with slightly weathered, dark brown fusion crust.

Petrography: (P. Brown, MeteoriticsLab; D. Sheikh, Cascadia) Sample is comprised of well-formed chondrules (Av. diameter ~1.1±0.4 mm, n=30, ~50 vol. %) and refractory inclusions (Av. diameter ~0.7±0.3 mm, n=8, ~2 vol. %) set within a primarily opaque matrix (~48 vol. %) composed of Fe-Ni metal and Ni-poor sulfides (<1 Ni wt. %, n=18).

Geochemistry: (D. Sheikh, Cascadia) Olivine (Fa16.5±13.5, range Fa0.5-45.3, n=33), Low-Ca Pyroxene (Fs2.5±4.1Wo3.3±1.7, range Fs0.8-14.7Wo0.8-5.8, n=11).

Classification: Carbonaceous chondrite (CVred3). The mineral compositions and texture indicate classification as a CV3. The presence of Fe-Ni metal combined with the low Ni content of sulfides (<1 Ni wt. %, n=18) and magnetic susceptibility indicate classification to the reduced group of CV3 chondrites, Gattacceca et al. (2020).

Specimens: 27.8 g at Cascadia, main mass with Daniel Sheikh.

Bibliography:
  • Gattacceca J.,Bonal L.,Sonzognia C., and Longereya J. (2020) CV chondrites: More than one parent body. Earth Planet. Sci. Letts. 547, 116467. (link)
Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:online
Date:P 2021
Mass (g):288.4
Pieces:1
Class:CVred3
Shock stage:low
Weathering grade:low
Fayalite (mol%):16.5±13.5
Ferrosilite (mol%):2.5±4.1
Wollastonite (mol%):3.3±1.7
Magnetic suscept.:3.95
Classifier:P. Brown, MeteoriticsLab; D. Sheikh, Cascadia
Type spec mass (g):27.8
Type spec location:Cascadia
Main mass:Pat Brown
Comments:CML 1558; submitted by Daniel Sheikh
Institutions
   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)
Catalogs:
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. ?
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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