Sample Petrographic Description
Sample Number | WIS 91608 |
Newsletter | 16,1 |
Location | Wisconsin Range |
Field Number | 7528 |
Dimensions (cm) | 1.0 x 0.3 x 0.5 |
Weight (g) | 0.28 |
Original Classification | C2 Chondrite |
Updated Classification | CM Chondrite (Anomalous) |
Pairing | WIS 91600; WIS 91608; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-44;Ferrosilite (mol%): 1-15 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Carol Schwarz | |
Seventy-five percent of these carbonaceous chondrite fragments are covered with black, fractured and rusty fusion crust. The fusion crust is frothy on 91608. The interior is black with numerous small dark gray chondrules/clasts. A minor amount of evaporite deposit is present on the exterior and interior surfaces of 91600. | |
Thin Section Description (,2) - Brian Mason | |
These sections are so similar that a single description suffices; the meteorites are probably paired. They show chondrules, up to 1.2 mm in diameter, irregular aggregates, and mineral grains, in a black carbonaceous matrix. The minerals are mainly olivine, with minor pyroxene. Olivine compositions are mostly near Mg2SiO4, but occasional iron-rich grains were analyzed, up to Fa44. Pyroxene compositions range from Fs, to Fs15. The meteorites are C2 chondrites. | |
Reclassification Notes (AMN 41,1) | |
Pairing, WIS 91600 (Choe et al., 2010) |
Antarctic Meteorite Images for Sample WIS 91608 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample WIS 91608 | ||||
Thin Section Photo(s) : | ||||