Sample Petrographic Description
Sample Number | ALH 85106 |
Newsletter | 10,2 |
Location | Allan Hills |
Field Number | 2650 |
Dimensions (cm) | 1.5 x 1.5 x 1.5 |
Weight (g) | 2.73 |
Original Classification | C2 Chondrite |
Updated Classification | CM1/2 Chondrite |
Pairing | ALH 83100; ALH 83102; ALH 83106; ALH 84029; ALH 84030; ALH 84031; ALH 84032; ALH 84034; ALH 84035; ALH 84040; ALH 84041; ALH 84042; ALH 84043; ALH 84044; ALH 84045; ALH 84047; ALH 84048; ALH 84049; ALH 84051; ALH 85004; ALH 85106; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0.3-30 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Roberta Score | |
The overall color of this weathered carbonaceous chondrite is greenish-gray. This greenish weathering extends 2 mm into the interior. The core of this stone is black and contains small white inclusions. | |
Thin Section Description (,2) - Brian Mason | |
The section shows silicate grains, irregular aggregates, and rare chondrules in a translucent to opaque matrix. Nickel-iron and sulfide are present in trace amounts. Microprobe analyses show olivine of variable composition - many grains are near Fa1, but the range is Fa0.3-30; pyroxene is rare. The meteorite is a C2 chondrite. | |
Reclassification Notes (AMN 45,2) | |
ALH 85106 has similar appearance (blocky fracture) and location to ALH 83100 and ALH 83102 and so they have been paired. |
Antarctic Meteorite Images for Sample ALH 85106 | ||||
Thin Section Photo(s) : | ||||