Sample Petrographic Description
Sample Number | ALH 83038 |
Newsletter | 10,2 |
Location | Allan Hills |
Field Number | 2517 |
Dimensions (cm) | 5.0 x 4.0 x 3.0 |
Weight (g) | 86.51 |
Original Classification | L3 Chondrite |
Updated Classification | L3.8 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%): 7-35;Ferrosilite (mol%): 2-22 | |
Weathering | |
C | |
Fracturing | |
A/B | |
Macroscopic Description - René Martinez | |
Brown, polygonally fractured fusion crust covers the top and iridescent fusion crust covers the bottom. Interior is heavily weathered, no features are visible in the brown matrix. | |
Thin Section Description (,3) - Brian Mason | |
Chondrules and chondrule fragments are abundant, ranging up to 2.4 mm across, and are set in a small amount of fine-grained turbid matrix. A few grains of nickel-iron and sulfide are present in the matrix. Brown limonitic staining pervades the section. Microprobe analyses show olivine ranging in composition from Fa7 to Fa35, with a mean of Fa21 (CV FeO is 34); pyroxene composition ranges from Fs2 to Fs22. The meteorite is an L3 chondrite (estimated 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 83038 | ||||
Thin Section Photo(s) : | ||||