Sample Petrographic Description
Sample Number | ALH 85155 |
Newsletter | 10,2 |
Location | Allan Hills |
Field Number | 2665 |
Dimensions (cm) | 2.5 x 2.0 x 2.5 |
Weight (g) | 18.45 |
Original Classification | L3 Chondrite |
Updated Classification | L3.7 Chondrite |
Pairing | ALH 77011; ALH 77015; ALH 77031; ALH 77033; ALH 77034; ALH 77036; ALH 77043; ALH 77047; ALH 77049; ALH 77050; ALH 77052; ALH 77115; ALH 77140; ALH 77160; ALH 77163; ALH 77164; ALH 77165; ALH 77166; ALH 77167; ALH 77170; ALH 77175; ALH 77178; ALH 77185; ALH 77211; ALH 77214; ALH 77241; ALH 77244; ALH 77249; ALH 77260; ALH 77303; ALH 78013; ALH 78015; ALH 78017; ALH 78037; ALH 78038; ALH 78041; ALH 78162; ALH 78170; ALH 78176; ALH 78180; ALH 78186; ALH 78188; ALH 78235; ALH 78236; ALH 78238; ALH 78239; ALH 78243; ALH 79001; ALH 79045; ALH 80133; ALH 81025; ALH 81030; ALH 81031; ALH 81032; ALH 81053; ALH 81060; ALH 81061; ALH 81065; ALH 81066; ALH 81069; ALH 81085; ALH 81087; ALH 81121; ALH 81145; ALH 81156; ALH 81162; ALH 81190; ALH 81191; ALH 81214; ALH 81229; ALH 81243; ALH 81259; ALH 81272; ALH 81280; ALH 81292; ALH 81299; ALH 83038; ALH 85155; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 8-28;Ferrosilite (mol%): 4-20 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Roberta Score | |
Ninety percent of this angular stone is covered with fusion crust. Medium-gray matrix with abundant inclusions make up the interior. Oxidation is minimal. | |
Thin Section Description (,3) - Brian Mason | |
Chondrules and chondrule fragments are abundant, ranging up to 1.5 mm across, and are set in a finely granular matrix. Small amounts of pale brown glass are present in the matrix and in some chondrules. Nickel-iron is present in minor amounts. Microprobe analyses show olivine ranging in composition from Fa8 to Fa28, with a mean of Fa21 (CV FeO is 30); pyroxene composition ranges from Fs4 to Fs20. The meteorite is an L3 chondrite (probably L3.6); it may be another member of the ALHA77011 pairing group. | |
Reclassification Notes (AMN OUTSIDE) | |
Classification updated in Meteoritical Bulletin 76. |
Antarctic Meteorite Images for Sample ALH 85155 | ||||
Thin Section Photo(s) : | ||||
References for Sample ALH85155 | |
Vernazza, P., and M. Lockhart , B. Zanda, R. P. Binzel, T. Hiroi, F. E. DeMeo, M. Birlan, R. Hewins, L. Ricci, P. Barge, 2014, Multiple and fast: The accretion of ordinary chondrite parent bodies. . The Astrophysical Journal , 791, 120-131, https://doi.org/10.1088/0004-637X/791/2/120. | |
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. | |
Marvin, U. B., MacPherson, G. J., 1992, Field and Laboratory Investigations of Antarctica Meteorites Collected by United States Expeditions, Smithsonian Contributions to the Earth Sciences Number, 30, 116. | |
Sears, D. W. G., Hasan, F. A., Batchelor, J. D., Lu, J., 1991, Chemical and physical studies of type 3 chondrites. XI-Metamorphism, pairing, and brecciation of ordinary chondrites. Proceedings Lunar and Planetary Science Conference, 21, 493-512. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |