Sample Petrographic Description
Sample Number | QUE 93523 |
Newsletter | 18,2 |
Location | Queen Alexandra Range |
Field Number | 8151 |
Dimensions (cm) | 0.8 x 0.6 x 0.3 |
Weight (g) | 0.44 |
Original Classification | E4 Chondrite |
Updated Classification | EH4 Chondrite |
Pairing | QUE 93513; QUE 93523; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0.4-1.9 | |
Weathering | |
B/C | |
Fracturing | |
A | |
Macroscopic Description - Carol Schwarz | |
Frothy fusion crust is present on this small chondrite. The overall appearance of QUE93523 is a polished, reddish brown fragment. The entire sample is now embedded in epoxy. | |
Thin Section Description (,1) - Brian Mason | |
The section shows an aggregate of chondrules and chondrule fragments, up to 1.2 mm across, and mineral grains in a moderate amount of black matrix. The chondrules and mineral grains consist almost entirely of pyroxene, with accessory olivine in a few chondrules. Polysynthetic twinning is present in some of the pyroxene. The matrix contains a moderate amount of nickel-iron and sulfides. Weathering is extensive, with veinlets and patches of brown limonite throughout the section. Microprobe analyses show that the pyroxene is close to MgSiO3 in composition (FeO 0.4-1.9%, CaO 0.1-0.6%). The nickel-iron contains 2.8% Si. The meteorite is classified as an E4 chondrite. It is very similar to QUE93513, with which it is probably paired. | |
Reclassification Notes (AMN 31,1) | |
Reclassified as EH4 Chondrite in AMN 31,1. Reference: A.E.Rubin and E.R.D.Scott, 1997, GCA 61, 425 |