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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:
Recommended:  CVred3    [explanation]

This is 1 of 25 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 Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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