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Cumulus Hills 04032
Basic information Name: Cumulus Hills 04032
     This is an OFFICIAL meteorite name.
Abbreviation: CMS 04032
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 84.9 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  Mesosiderite
Meteoritical Bulletin:  MB 94  (2008)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 181 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 17 Feb 2008
Writeuphelp
Writeup from AMN 31(1):
Sample No.: CMS 04032
Location: Cumulus Hills
Field No.: 14646
Dimensions (cm):   4.5 x 3.0 x 2.5
Weight (g): 84.85
Meteorite Type:

Mesosiderite

Pairing:


Macroscopic Description: Kathleen McBride
40% of the exterior surface has brown/black, fractured fusion crust. The interior is an “odd” combination of fine-grained material and a more coarse grained, dark crystalline material, some weathered to a rusty tan color. Some areas are gray with “holes”. The meteorite has some metal rich inclusions. It is somewhat friable and has a granular texture.

 

Thin Section (,2) Description: McCoy, Linda Welzenbach and Cari Corrigan
The section shows a groundmass of comminuted pyroxene and plagioclase with abundant metal and sulfide that occur as stringers up to several mm in length and a cm-sized clast containing two pyroxene grains each approaching 5 mm. Orthopyroxene compositions are reasonably homogenous ranging from Fs30-33Wo1-3 (Fe/Mn ~30) and plagioclase is An89Or1. The meteorite is probably a silicate-rich clast from a mesosiderite. Pairing with CMS 04021 is possible given the very similar mineral compositions, although the latter is poorer in metal and sulfide and perhaps more metamorphosed. These differences may be within the expected variation in a single mesosiderite.


Thin Section Images

Plane-Polarized
Light CMS 04032
Reflective
Light CMS 04032
Cross-Polarized
Light CMS 04032
CMS 04032 - Plane-Polarized
CMS 04032 - Reflective
CMS 04032 - Cross-Polarized



Lab Images

North View
CMS 04032
Splits View
CMS 04032
CMS 04032 - North View
CMS 04032 - Splits View

Data from:
  MB94
  Table 4
  Line 400:
Mass (g):84.9
Class:Mesosiderite
Weathering grade:B/C
Ferrosilite (mol%):30-33
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 31(1) (2008), JSC, Houston
Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 38940 approved meteorites from Antarctica (plus 5051 unapproved names)

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