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Elephant Moraine 87805
Basic information Name: Elephant Moraine 87805
     This is an OFFICIAL meteorite name.
Abbreviation: EET 87805
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 62.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 12(3)  (1989)  H3
Meteoritical Bulletin:  MB 76  (1994)  H3.7
NHM Catalogue:  5th Edition  (2000)  H3.7
MetBase:  v. 7.1  (2006)  H3.7
Recommended:  H3.7    [explanation]

This is 1 of 75 approved meteorites classified as H3.7.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 12(3):

Sample No.: EET87805

Location: Elephant Moraine

Dimensions (cm): 3x3.5x2.5

Field Number: 4593

Weight (g): 62.7

Meteorite Type: H3 chondrite

 

Macroscopic Description: Carol Schwarz

Fusion crust , which covers ~70% of the exterior, is thin and flaking off. The interior is completely oxidized; the effects of weathering have obscured any features that may be present.

 

Thin Section (,4) Description: Brian Mason,

The section shows a close-packed aggregate of chondrules, chondrule fragments, and mineral grains in a minor amount of finely crystalline matrix. The matrix contains a moderate amount of nickel-iron and a lesser amount of troilite, in part concentrated as rims on the chondrules. Chondrules range up to 2.1 mm in diameter; most are granular or porphyritic olivine and olivine-pyroxene, but one fine-grained radiating pyroxene chondrule was noted. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa3-19, mean Fa16 (CV FeO is 25); pyroxene Fs4-26, mean Fs10. The meteorite is classified as an H3 chondrite, estimated H3.7.

Data from:
  MB76
  Table 2
  Line 1978:
Origin or pseudonym:Meteorite City
Mass (g):62.7
Class:H3.7
Weathering grade:B/C
Fayalite (mol%):3-19
Ferrosilite (mol%):4-26
Comments:NTL=6.4±0.1
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 12(3) (1989), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 11'S, 157° 10'E)

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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