Sample Petrographic Description
Sample Number | LAP 031047 |
Newsletter | 29,2 |
Location | LaPaz Ice Field |
Field Number | 16900 |
Dimensions (cm) | 3.5 x 2.0 x 1.5 |
Weight (g) | 16.47 |
Original Classification | L Chondrite (Impact Melt) |
Pairing | LAP 03788; LAP 031047; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 23;Ferrosilite (mol%): 17 | |
Weathering | |
A | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
50% of the exterior is dull black with oxidation halos. The interior is a dark brown matrix which is friable and very weathered. | |
Thin Section Description (,2) - Tim McCoy | |
The section is an L chondrite (Fa23, Fs17) that has been partially to completely impact remelted. A fine-grained uniform texture includes numerous voids and rounded composite metal-sulfide particles. | |
Notes | |
Paired with LAP 03788 based on 3D textural data from micro-CT scanning (see AMN 41, no. 2). |
References for Sample LAP031047 | |
Pourkhorsandi, H., Gattacceca, J., Rochette, P., Smith, T., Bonal, L , D'Orazio, M., Devouard, B., Sonzogni, C., and Debaille, V., 2022, The Famenin fall and other ordinary chondrites intermediate between H and L groups, Meteoritics & Planetary Science, 57:5, 1038-1059, doi:10.1111/maps.13801. | |
Swindle, T. D., Kring, D. A., Weirich, J. R., 2013, 40Ar/39Ar ages of impacts involving ordinary chondrite meteorites. Geological Society, London, Special Publications, 378, 2013, SP378-6. | |
Wittmann, A., Kring, D. A., Friedrich, J. M., Troiano, J., Macke, R. J., Britt, D. T., Swindle, T. D., Weirich, J. R., Rumble III, D., Lasue, J., 2011, H/L chondrite LaPaz Icefield 031047 - A feather of Icarus?. Geochimica et Cosmochimica Acta, 75 Issue 20, 15-Oct-11, 6140-6159, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2011.07.037. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |