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Roberts Massif 04133
Basic information Name: Roberts Massif 04133
     This is an OFFICIAL meteorite name.
Abbreviation: RBT 04133
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 459 g
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CR2
Meteoritical Bulletin:  MB 94  (2008)  CR2
MB 103  (2014)  CV3
Antarctic Meteorite Newsletter:  AMN 38(2)  (2015)  CV3
Recommended:  CV3    [explanation]

This is 1 of 537 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 17 Feb 2008
Revised 28 Aug 2015: Reclassified in AMN 38(2)
Writeup from AMN 38(2):
Reclassification of  RBT 04133

RBT 04133 was classified as a CR2 in the February 2008 (vol.31 No. 1) newsletter. More detailed information has led to a better understanding of this sample, which we here re-classify to CV3 (reduced), based on the study of Davidson et al. (2014). Quoting from their paper: “Data presented here conflict with its initial classification as a CR2. Petrographically, RBT 04133 appears to be a CV3red, based on the presence of large CAIs and chondrules, the apparent lack of magnetite, and a matrix composition of Fa59–60. This is in agreement with its whole-rock C, N, and O-isotope compositions, and the Raman spectral characteristics of its IOM.”
  • Davidson J, Schrader D.L., Alexander C.M.O'D., Lauretta D., Busemann H, Franchi I., Greenwood R.C., Connolly H.C., Domanik K.J., and Verchovsky A. (2014) Petrography, stable isotope compositions, microRaman spectroscopy, and presolar components of Roberts Massif 04133: A reduced CV3 carbonaceous chondrite. Meteorit. Planet. Sci. 49 2133-2151 (link)
Data from:
  Table 4
  Line 656:
Mass (g):459.4
Weathering grade:B/C
Fayalite (mol%):1-12
Ferrosilite (mol%):1-2
Data from:
  Table 4
  Line 732:
Mass (g):459.4
Weathering grade:B/C
Fayalite (mol%):1-12
Ferrosilite (mol%):1-2
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 31(1) (2008), JSC, Houston
Published in Antarctic Meteorite Newsletter 38(2) (2015), JSC, Houston
Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)

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