| Newsletter |
29,1 |
| Location |
LaPaz Ice Field |
| Field Number |
16455 |
| Dimensions (cm) |
3.0 x 2.5 x 1.5 |
| Weight (g) |
20.60 |
| Original Classification |
CK5 Chondrite |
| Updated Classification |
LL5 Chondrite |
| Fayalite (mol%): 31;Ferrosilite (mol%): 25 |
| A/B |
| A |
| The exterior is covered with brown/black fusion crust with polygonal fractures. The gray matrix has minor rust and high metal content. A few gray chondrules are visible. |
| The section consists of large (up to 1.5 mm) poorly-defined chondrules in a matrix of finer-grained silicates, sulfides and magnetite. The meteorite is little weathered, but extensively shock blackened. Silicates are homogeneous. Olivine is Fa31 and orthopyroxene is Fs25. The meteorite is a CK5 chondrite. |
| This sample was originally classified as a CK5 chondrite, but chemical analyses reveal that it is very close in composition (Zn/Mn vs. Al/Mn) to many other LL chondrites (Isa, M. et al., 2011, LPSC abstract #1876). This information, together with the observation that there is metal present and no magnetite, has led us to reclassify this sample as an LL5 chondrite. |
