Meteoritical Bulletin: Entry for Northwest Africa 5028

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Northwest Africa 5028

Basic information

Name: Northwest Africa 5028
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5028
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass: 2.45 kg

Classification
history:

Meteoritical Bulletin:	MB 97	(2010)	CR2
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 6 Nov 2009
Revised 26 Dec 2022: Reclassification

Writeup

Writeup from MB 112:

NWA 5028, reclassification

(D. Schrader, ASU): A comparison of the overall petrography and mineral compositions of NWA 5028 with that of the CR and CV chondrites indicates that NWA 5028 is not a CR chondrite, and is instead a reduced CV3 chondrite (Dunham et al., 2022). In particular, the large mean size of chondrules (1.22±0.25 mm; mean±2σ; 40 whole chondrules), the high abundance and large size of CAIs (6.5 vol.%, apparent diameters 2.0 to 5.0 mm), and opaque mineralogy of NWA 5028 are inconsistent with that of CR chondrites (Schrader et al., 2015), and instead show NWA 5028 is a reduced CV3. In addition, the low Ni content of sulfides in NWA 5028 is consistent with that noted for the reduced subgroup (e.g., Gattacceca et al., 2020).

Bibliography:

Dunham E. T., Wadhwa M., Desch S. J., Liu M. C., Fukuda K., Kita N., Hertwig A. T., Hervig R. L., Defouilloy C., Simon S. B., Davidson J., Schrader D. L. and Fujimoto Y. (2022) Uniform initial 10Be/9Be inferred from refractory inclusions in CV3, CO3, CR2, and CH/CB chondrites. Geochimica et Cosmochimica Acta 324, 194–220. (link)
Gattacceca J.,Bonal L.,Sonzognia C., and Longereya J. (2020) CV chondrites: More than one parent body. Earth Planet. Sci. Letts. 547, 116467. (link)
Schrader D. L., Connolly H. C., Lauretta D. S., Zega T. J., Davidson J. and Domanik K. J. (2014) The formation and alteration of the Renazzo-like carbonaceous chondrites III: Toward understanding the genesis of ferromagnesian chondrules. Meteoritics & Planetary Science 50, 15–50. (link)

Data from:
  MB97
  Table 1
  Line 195:

Place of purchase:	Erfoud, Morocco
Date:	2007
Mass (g):	2445
Pieces:	1
Class:	CR2
Fayalite (mol%):	0.6 ± 0.2
Ferrosilite (mol%):	1.5 ± 0.5
Wollastonite (mol%):	0.8 ± 0.2
Classifier:	A. Rubin, UCLA
Type spec mass (g):	22
Type spec location:	UCLA
Main mass:	Morgan

Institutions
and collections

ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 97, MAPS 45, 449-493 (2010)
Published in Meteoritical Bulletin, no. 112, in preparation (2023)

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)
Solar Anamnesis

Geography:

Coordinates:

Unknown.

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

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