Sample Petrographic Description
Sample Number | ALH 85004 |
Newsletter | 10,1 |
Location | Allan Hills |
Field Number | 2298 |
Dimensions (cm) | ten pieces |
Weight (g) | 8.37 |
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; |
Weathering | |
B | |
Fracturing | |
C | |
Macroscopic Description - René Martinez | |
ALH85004 consists of ten fragments plus many fines. All fragments are black and fine-grained. | |
Thin Section Description (,3) - Brian Mason | |
The thin section shows small chondrules, irregular aggregates, and mineral grains in a dark brown to black matrix. Practically all the chondrules, aggregates, and mineral grains consist of pale green isotropic serpentinous material; a few grains of calcite were identified. The meteorite is a C2 chondrite; the extreme degree of serpentinization is reminiscent of ALH83100. | |
Reclassification Notes (AMN 45,2) | |
ALH 85004 has similar appearance and location to ALH 83100 and ALH 83102 and so they have been paired. |
Antarctic Meteorite Images for Sample ALH 85004 | ||||
Thin Section Photo(s) : | ||||