|
Allan Hills A78043 | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Allan Hills A78043 This is an OFFICIAL meteorite name. Abbreviation: ALHA78043 This meteorite may also be called Allan Hills 78043 (ALH 78043) in publications. Observed fall: No Year found: 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass: 680 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 12727 approved meteorites (plus 11 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||
Writeup |
Writeup from AMN 3(2):
This text was reprinted from AMN 3(2) in AMN 4(1). In some cases, it may be an updated version from the original. Sample No.: ALHA78043 Location: Allan Hills Field No.: 264 Weight (gms): 680.0 Meteorite Type: L6 Chondrite
Physical Description: The sample is approximately 10.0 x 8.5 x 6.0 cm., and covered with a black fusion crust, ~1 mm. thick, that has some weathering. The W surface appears to be less weathered than the remaining surfaces. A large chondrule is present on the B surface. The T surface is a fracture surface with some remnant patches of fusion crust present. The matrix of the sample is yellowish green with some small (<3 mm.) clasts apparent. During processing the sample broke along previously existing fractures, which were weathered and stained by iron oxidation. Only a few metallic flecks were present in the greenish-gray to orangish matrix material.
Petrographic Description: Brian Mason The section shows sparse chondrules with diffuse margins, tending to merge with the granular groundmass, which consists of olivine and pyroxene with minor subequal amounts of nickel-iron and troilite, a little plagioclase, and accessory chromite. Minor limonitic staining is present around nickel-iron grains. Well-preserved fusion crust 0.5 mm thick is present along one edge. Microprobe analyses give the following compositions: olivine Fa25; pyroxene, Fs21; plagioclase, An10; accessory merrillite was identified with the microprobe. The meteorite is an L6 chondrite. ALHA 78043 is an L6 chondrite similar in all respects to ALHA 78045. | ||||||||||||||||||||||||
Data from: MB76 Table 2 Line 286: |
|
||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||
References: | Published in Antarctic Meteorite Newsletter 3(2) (1980), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
| ||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
Proximity search: | |||||||||||||||||||||||||
Crosslinks: |
This lists all records that are linked to this record and to each other.
| ||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|