Sample Petrographic Description
Sample Number | ALH 83106 |
Newsletter | 9,1 |
Location | Allan Hills |
Field Number | 2799 |
Dimensions (cm) | 4.5 x 2.5 x 1.5 |
Weight (g) | 22.31 |
Original Classification | C2 Chondrite |
Updated Classification | CM1/2 Chondrite |
Pairing | ALH 83100; ALH 83102; ALH 83106; ALH 84029; ALH 84030; ALH 84031; ALH 84032; ALH 84034; ALH 84035; ALH 84040; ALH 84041; ALH 84042; ALH 84043; ALH 84044; ALH 84045; ALH 84047; ALH 84048; ALH 84049; ALH 84051; ALH 85004; ALH 85106; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0.2-5 | |
Weathering | |
A | |
Fracturing | |
A/B | |
Macroscopic Description - Carol Schwarz | |
This meteorite has a rectangular shape and is covered with a very black and sometimes polygonally fractured fusion crust on three sides. The other surfaces are olive green and very fine-grained. One or two cracks penetrate the specimen. The interior is black and very fine-grained. | |
Thin Section Description (,4) - Brian Mason | |
Chondrules are small and sparse, the section consisting largely of small mineral grains (0.01-0.1 mm across) in a translucent brown to black matrix. Most of the mineral grains are serpentinized. Olivine in the chondrules is mostly close to forsterite in composition, but compositions up to Fa5 were measured. Troilite and nickel-iron are extremely rare. The meteorite is a C2 chondrite, possibly paired with ALH83100. | |
Reclassification Notes (AMN 45,2) | |
ALH 83106 has similar appearance and location to ALH 83100 and ALH 83102 and so they have been paired. |
Antarctic Meteorite Images for Sample ALH 83106 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample ALH 83106 | ||||
Thin Section Photo(s) : | ||||
References for Sample ALH83106 | |
Hiroi, T., Ohtsuka, K., Howard, K.T., Robertson, K.R., and Milliken, R.E., Kaiden, H., Imae, N., Misawa, K., Kojima, H., Sasakia, S., Matsuokaa, M., Nakamura, T., Bish, D.L., 2021, UV-visible-infrared spectral survey of Antarctic carbonaceous chondrite chips. Polar Science, 29, 100723, https://doi.org/10.1016/j.polar.2021.100723. | |
Kaplan, H.H., Connolly, H.C., Dotto, E., Emery, J.P., Fornasier, S., Lantz, C., Lim, L.F., Merlin, F., Praet, A., Reuter, D.C., Sanford, S.A., Hamilton, V.E., Simon, A.A., Takir, D., and Lauretta, D.S., Howell, E.S., Anderson, F.S., Barrucci, M.A., Brucato, J., Burbine, T.H., Clark, B.E., Cloutis, E.A., 2020, Visible-near infrared spectral indices for mapping mineralogy and chemistry with OSIRIS-Rex. Meteoritics & Planetary Science, 55, 744-765, doi: 10.111/maps.13461. | |
Benoit, P. H., Sears, D. W. G., Akridge, J. M. C., Bland, P. A., Berry, F. J., Pillinger, C. T., 2000, The non-trivial problem of meteorite pairing. Meteoritics & Planetary Science, 35, 393-417. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |