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| MacAlpine Hills 87300 | |||||||||||||||||||||||||
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| Basic information | Name: MacAlpine Hills 87300 This is an OFFICIAL meteorite name. Abbreviation: MAC 87300 Observed fall: No Year found: 1987 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  167.5 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 25 approved meteorites classified as C2-ung. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and Ungrouped chondrites | ||||||||||||||||||||||||
| Comments: | Field number: 4624 | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 11(2):
Sample No.: MAC87300; 87301 Location: MacAlpine Hills Weight (g): 167.5; 110.9 Field No.: 4624; 4608 Dimensions (cm): 6x5.5x3.5; 5.5x5x3.5 Meteorite Type: C2 Chondrite
Macroscopic Description: Cecilia Satterwhite About 40-50% of the exterior of these fragments is covered with dull black fusion crust. Interior is dark black to gray with many white inclusions. One large dark-red clast (1 cm) is conspicuous on both of these samples.
Thin Section (87300,2; 87301,7) Description: Brian Mason These sections are so similar in all respects that these meteorites are almost certainly paired. Chondrules are abundant but small (up to 0.6 mm across) and, together with chondrule fragments and mineral grains, are set in a dark brown to black matrix. Chondrules consist of granular or porphyritic olivine and olivine-pyroxene; mineral grains are mainly olivine. Microprobe analyses show that most of the olivine is near Mg2SiO4 in composition, but a few iron-rich grains were analyzed; mean composition is Fa7 . Pyroxene composition ranges from Fs1 to Fs9. The meteorites are C2 chondrites. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 4627: |
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| References: | Published in Antarctic Meteorite Newsletter 11(2) (1988), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:
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Statistics: This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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