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Met Name

Met Type

Thin Sections

  Pallasite

Fall not observed. Found 2003 in Antarctica.

There are 18 other meteorites paired with this one - all together CMS 04061 through CMS 04079 - with a combined mass of 147.426 kg.

Photo 1 is CMS 04069 and weighs 44.7 kilos.

Photo 2 is CMS 04071, weighing 2110 grams. As noted in the Contributor Info this specimen was used to make slices and thin sections.

Photo 3 is a slice from CMS 04071.

Photo 4 is a thin section from CMS 04071, photographed in reflected light.

Photo 5 is CMS 04074, weighing 326.7 grams.

Photo 6 is a map showing the Cumulus Hills in Antarctica, where these meteorites were found.


 
Location Map of Antarctic Finds



AMN writes:

Macroscopic Description by Tim McCoy, Linda Welzenbach:

These meteorites are pallasites with common exterior morphology and weathering. They range in mass from 8.2 g to 44.7 kg. They all exhibit a very weathered, rusty exterior with extensive removal of olivine, leaving voids that range in size from a few millimeters to many centimeters. The larger cavities probably resulted from extensive olivine removal during physical and chemical weathering and weathering of any residual metallic matrix.

Thin Section Description (,4) by Tim McCoy

CMS 04071 was selected for examination. This mass is typical of the group in exterior morphology and weathering and of moderate size (2.11 kg). Two slices were cut from the center of the mass, each measuring ~9 cm by 6 cm. These slices exhibit fragmental, angular olivine grains ranging in size from a hundred microns to 2 cm in size. Olivine grains exhibit extensive iron oxide staining, producing olivine grains that range from brown near the margins of the slice to green in the interior. Interstitial to these grains are euhedral and irregular chromites, as well as troilite and schreibersite. Olivine is Fa12 and the texture, mineralogy and even degree of weathering are reminiscent of Imilac. The meteorites are pallasites, probably members of the main group.