header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 7 Jul 2020
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Roberts Massif 04228
Basic information Name: Roberts Massif 04228
     This is an OFFICIAL meteorite name.
Abbreviation: RBT 04228
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 19.8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 29(2)  (2006)  Acapulcoite
Meteoritical Bulletin:  MB 92  (2007)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 79 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 1 Sep 2006
Writeuphelp
Writeup from AMN 29(2):
Sample No.: RBT 04228
Location: Roberts Massif
Field No.: 14633
Dimensions (cm):   3.5x3.0x1.25
Weight (g): 19.776
Meteorite Type: Acapulcoite


Macroscopic Description: Kathleen McBride
The fusion crust is rusty black with cracks. The interior has a rusty granular texture with a high metal content and crumbles easily.


Thin Section (,2) Description: Tim McCoy
The section exhibits a granoblastic texture with abundant triple junctions and grain sizes of 100-300 microns. Olivine, pyroxene and plagioclase are uniformly distributed, but metal and sulfide exhibit a very heterogeneous distribution on a mm-scale. Olivine is Fa8, pyroxene is Fs10Wo2 and plagioclase is An13Or5. The meteorite is an acapulcoite.



Thin Section Images

Cross-Polarized LightPlane-Polarized Light
RBT 04228 - Cross-Polarized Light RBT 04228 - Plane-Polarized Light



Lab Images

RBT 04228 Image North

Data from:
  MB92
  Table 3
  Line 1124:
Mass (g):19.8
Class:Acp
Weathering grade:C
Fayalite (mol%):8
Ferrosilite (mol%):10
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)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photographs from AMN:
JSC A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)

Direct link to this page