Sample Petrographic Description
Sample Number | LAP 04843 |
Newsletter | 29,1 |
Location | LaPaz Ice Field |
Field Number | 17006 |
Dimensions (cm) | 5.0 x 5.0 x 2.5 |
Weight (g) | 108.64 |
Original Classification | CV3 Chondrite |
Updated Classification | CV 3.7 Chondrite Oxidized A |
Pairing | LAP 02206; LAP 02228; LAP 04843; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-46;Ferrosilite (mol%): 1 | |
Weathering | |
B/Ce | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior has rough, black fusion crust with purple shiny areas. Vugs of plucked areas are visible. The muddy gray matrix has white clasts with evaporites. This meteorite was very hard. | |
Thin Section Description (,4) - Tim McCoy, Linda Welzenbach | |
The section exhibits large chondrules (up to 3 mm) and CAIs in a dark matrix. Olivines range from Fa1-46 and a single pyroxene is Fs1. The meteorite is an oxidized CV3. | |
Reclassification Notes (AMN 46,1) | |
Reclassification and pairing based on Raman spectroscopy (petrologic type 3.7), and on Ni content of metal and sulfide and magnetic susceptibility (Oxidized A). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |
Antarctic Meteorite Images for Sample LAP 04843 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAP 04843 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAP04843 | |
Jogo, K., Ito, M., Wakita, S., Kobayashi, S., & Lee, J. I., 2019, Origin of the metamorphosed clasts in the CV 3 carbonaceous chondrite breccias of Graves Nunataks 06101, Vigarano, Roberts Massif 04143, and Yamato-86009. Meteoritics & Planetary Science, 54, 1133-1152. | |
Ishida, H., Nakamura, T., Miura, H., Kakazu, Y., 2012, Diverse mineralogical and oxygen isotopic signatures recorded in CV3 carbonaceous chondrites. Polar Science, 6 Issues 3-4, August-November 2012, 252-262, ISSN 1873-9652, http://dx.doi.org/10.1016/j.polar.2012.06.002. |