Antarctic Meteorite Petrographic Description

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Sample Petrographic Description

Sample Number

MIL 07558

Newsletter

34,1

Location

Miller Range

Field Number

17964

Dimensions (cm)

1.0 x 0.75 x 0.5

Weight (g)

0.73

Original Classification

CB Chondrite

Pairing

MIL 05082; MIL 07404; MIL 07411; MIL 07558; MIL 07588; MIL 07598; MIL 090985

Mineral Composition (%Fa & %Fs)

Fayalite (mol%): 3-23;Ferrosilite (mol%): 2-24

Weathering

B/C

Fracturing

Macroscopic Description - Kathleen McBride

The exteriors are brown with rusty patches. The interiors are rusty with high amounts of metal.

Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach

The sections consist of round metal chondrules (up to 1 cm) and chondrule fragments. Chondrule fragments up to 1 mm are dominated by radiating pyroxene textures with olivine present. Silicates are magnesian (Fa_4-47, Fs_2-9Wo_0-12). The meteorites are CB chondrites and may be paired with the MIL 05082 pairing group.

Antarctic Meteorite Images for Sample MIL 07558

Field Photo(s) :

ANSMET MIL 07558 - Field Number: 17964, NASA Photo Number: jsc2019e072368

Field photo image(s) courtesy of the ANSMET (ANtarctic Search for METeorites) Program, Case Western Reserve University and the University of Utah