Sample Petrographic Description
Sample Number | LAP 03780 |
Newsletter | 27,3 |
Location | LaPaz Ice Field |
Field Number | 16745 |
Dimensions (cm) | 3.5 x 2.5 x 2.0 |
Weight (g) | 21.81 |
Original Classification | Aubrite |
Pairing | LAP 02233; LAP 031269; LAP 031372; LAP 03780; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0 | |
Weathering | |
B/C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exteriors are white without any fusion crust. The interiors are white matrix with brown circular to oval shaped inclusions. | |
Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
The sections consist of an aggregate of coarse (up to 5 mm), heavily shocked enstatite grains with minor to trace abundances of diopside, metal, troilite, alabandite, and daubreelite. Silicates are essentially FeO-free enstatite (Fs0Wo1) and diopside (Fs0Wo43). The meteorites are aubrites and may be paired with LAP 02233. They were found over a range of 1.5 km. |
Antarctic Meteorite Images for Sample LAP 03780 | ||||
Lab Photo(s) : | ||||
References for Sample LAP03780 | |
Rubin, A. E., 2015, Shock and annealing in aubrites: Implications for parent-body history. Meteoritics & Planetary Science, 50, 1217-1227, http://dx.doi.org/10.1111/maps.12464. | |
Keil, K., 2010, Enstatite achondrite meteorites (aubrites) and the histories of their asteroidal parent bodies. Chemie der Erde - Geochemistry, 70 Issue 4, 2010, 295-317, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2010.02.002. |