Sample Petrographic Description
Sample Number | DOM 18269 |
Newsletter | 46,1 |
Location | Dominion Range |
Field Number | 25341 |
Dimensions (cm) | 3.5 x 3.5 x 2.5 |
Weight (g) | 99.17 |
Original Classification | IRON-UNGROUPED |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Cari Corrigan, Tim McCoy | |
The meteorite is roughly equidimensional in plan view and flattened in the third dimension. A convex surface is separated from a concave surface by an indistinct lip, possibly suggesting flight orientation. The entire surface is brown, lightly weathered, pitted, and grooved, with pits reaching a few millimeters in maximum dimension. | |
Thin Section Description (,,2) - Cari Corrigan, Tim McCoy | |
The section consists of equant kamacite grains up to 1.5 mm in dimension with interstitial ribbons of taenite and occasional schreibersite. Graphite blebs of a few tens of microns in size form swarms whose occurrence is independent of the kamacite grain structure. No fusion crust is observed on the section although α2 structure is present along some margins of the meteorite and occasionally along kamacite-kamacite grain boundaries suggestive of an origin by shock. The average Ni concentration determined from two perpendicular longitudinal traverses is 7.4 wt.% Ni. The meteorite contains less than 0.28 wt.% P. The meteorite is likely an ungrouped iron and pairing with the ungrouped iron DOM 18173 is suggested. |
Antarctic Meteorite Images for Sample DOM 18269 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample DOM 18269 | ||||
Thin Section Photo(s) : | ||||