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| Huntsman (b) | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Huntsman (b) This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 1977 Country: United States Mass:  10.22 kg | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 694 approved meteorites (plus 2 unapproved names) classified as H3. [show all] Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 18 Jan 2020 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Huntsman (b) 41°13.498’N, 103°1.595’W Nebraska, United States Find: 1977 Classification: Ordinary chondrite (H3) History: 10.215 kg found in 1977 on the Spiker family farm near Huntsman, Nebraska. Sample was initially screened and passed on for classification by New England Meteoritical Services (NEMS). Physical characteristics: Physical Characteristics: Single stone, weathered dark-brown exterior with sparse minor patches of weathered fusion crust. Saw cut reveals dark interior with scattered chondrules, numerous bright grains of iron-nickel metal and sulfide, and a small darker inclusion lacking metal or sulfide grains. Petrography: (K. Domanik and F. Stephan, UAz) Microprobe examination of a polished mount shows numerous recognizable chondrules averaging ~500 μm in diameter set in a fragmental matrix. Silicate compositions of both chondrules and matrix are highly variable. Secondary plagioclase is minor to absent. Kamacite grains, 200-400 μm in size constitute ~10 vol% of the meteorite and are associated with lesser amounts of troilite and Ni-rich taenite. The sample examined contains several small, recrystallized shock veins as well as a 9 × 3 mm melt area containing zoned euhedral to subhedral olivine crystals set in a matrix of isotropic glass. Minor merrillite and silica were also observed. Geochemistry: Mineral compositions and geochemistry: (K. Domanik and F. Stephan, UAz) Olivine Fa16.9±5.6, range Fa0.6-33.0, PMD-FeO 20.8%, Fe/Mn=39.3±7.7, n=112; low-Ca pyroxene Fs11.3±6.4Wo0.9±0.6, range Fs1.6-30.6, PMD-FeO 44.7, Fe/Mn=20.3±7.1, n=48. Kamacite Fe=92.9±0.9, Ni=6.1±0.9, Co=0.5±0.1 (wt%), n=24. Classification: Ordinary Chondrite (H3), consistent with type 3.6 based on PMD-FeO of olivine and low-Ca pyroxene, sigma Fa vs. average Fa content of olivine, and low Co heterogeneity in kamacite. Found 5.2 km NW of Huntsman [which now gets the synonym Huntsman (a)] and maybe potentially paired with it given the proximity. Although Huntsman (a) is classified as H4, data for Fa and Fs variability are currently lacking for this specimen. Specimens: 48.1 g, two probe mounts and a thin section on deposit at UAz, Jerry Spiker holds the main mass. | ||||||||||||||||||||||||||||||||||||
| Data from: MB109 Table 0 Line 0: |
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| Institutions and collections |
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012) |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 50 approved meteorites from Nebraska, United States This is 1 of 1895 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters) | ||||||||||||||||||||||||||||||||||||
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