Meteoritical Bulletin: Entry for Roberts Massif 04162

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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: 52.3 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 29(2)	(2006)	Iron-ung
Meteoritical Bulletin:	MB 92	(2007)	Iron-ung
Recommended:			Iron, ungrouped [explanation]

This is 1 of 151 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

help

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

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:
  MB92
  Table 3
  Line 1058:

Mass (g):	52.3
Class:	Iron-ung

Catalogs:

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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Photos:

Credit	Photos
Photographs from AMN:
JSC	A photo is in the write-up above

Geography:

Antarctica

Antarctica

Coordinates:

Unknown.

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

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