Sample Petrographic Description
Sample Number | LAP 10060 |
Newsletter | 36,1 |
Location | LaPaz Ice Field |
Field Number | 22983 |
Dimensions (cm) | 4.5 x 3.0 x 1.5 |
Weight (g) | 30.97 |
Original Classification | Howardite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 24-60 | |
Weathering | |
A | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
The brown/black exterior surface has a shiny patch of fusion crust. The gray matrix has low metal and white and dark gray clasts. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Andrew Beck | |
The section shows a groundmass of comminuted pyroxene and plagioclase (10-20 microns) with large diogenitic and eucritic grain fragments up to 200 micron, as well as 100-200 micron troilite and metal blebs. One particularly large (3 x 5 mm) bleb of troilite makes up ~20% of the section. Pyroxene compositions range from Fs24-60Wo2-6. Plagioclase is An86-99Or0-1. The Fe/Mn ratio of this meteorite is 26-30, with one outlier at 36. This meteorite is either a metal rich howardite or a silicate clast separated from a mesosiderite. |
Antarctic Meteorite Images for Sample LAP 10060 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAP 10060 | ||||
Thin Section Photo(s) : | ||||