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Roberts Massif 04162
Basic information Name: Roberts Massif 04162
     This is an OFFICIAL meteorite name.
Abbreviation: RBT 04162
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 52.3 g
Antarctic Meteorite Newsletter:  AMN 29(2)  (2006)  Iron-ung
Meteoritical Bulletin:  MB 92  (2007)  Iron-ung
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 145 approved meteorites (plus 1 unapproved name) classified as Iron, ungrouped.   [show all]
Search for other: Iron meteorites, Metal-rich meteorites, and Ungrouped irons
Comments: Approved 1 Sep 2006
Writeup from AMN 29(2):
Sample No.: RBT 04162; RBT 04299
Location: Roberts Massif
Field No.: 16208; 15114
Dimensions (cm):   3.5x2.0x2.0; 5.5x2.0x2.0
Weight (g): 52.315; 55.198
Meteorite Type: Iron-Ungrouped

Macroscopic Description: Tim McCoy, Linda Welzenbach
Both RBT 04299 and RBT 04162 exhibit a common external appearance. Surfaces are heavily oxidized, rough and flaking. Some fusion crust can be found on RBT 04162. One to three mm yellow halos surrounding pin holes occur all over the surface of RBT 04299. Cut faces show extremely fine scale structure.

Thin Section (,2) Description: Tim McCoy
The sections consist of ~70% Fe,Ni metal and ~30% troilite (FeS). The metal occurs as a dendritic texture within the troilite matrix. The structure is at an extremely fine scale, with dendrite arm spacings of ~50 microns. Rare, small (<20 µm ) chromites are present. The meteorites are ungrouped irons and share some similarities with other ungrouped, sulfide-rich iron meteorites, such as HOW 88403.

Thin Section Images

Reflected Light
RBT 04162
Reflected Light
RBT 04162
Reflected Light
RBT 04162
RBT 04162 - Reflected Light RBT 04162 - Reflected Light RBT 04162 - Reflected Light
Reflected Light
RBT 04299
Reflected Light
RBT 04299
Reflected Light
RBT 04299
Reflected Light
RBT 04299

Lab Images

RBT 04162 Image East
RBT 04162 Image North
RBT 04162 Image South
RBT 04299 Image East
RBT 04299 Image North
RBT 04299 Image West

Data from:
  Table 3
  Line 1058:
Mass (g):52.3
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 29(2) (2006), JSC, Houston
Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
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Photographs from AMN:
JSC A photo is in the write-up above


     This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names)

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