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Elephant Moraine 87522
Basic information Name: Elephant Moraine 87522
     This is an OFFICIAL meteorite name.
Abbreviation: EET 87522
Observed fall: No
Year found: 1987
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 68.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 11(2)  (1988)  C2
AMN 17(1)  (1994)  CM2
Meteoritical Bulletin:  MB 76  (1994)  CM2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Recommended:  CM2    [explanation]

This is 1 of 539 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeuphelp
Writeup from AMN 11(2):

Sample No.: EET87522

Location: Elephant Moraine

Weight (g): 68.6

Field No.: 4468

Dimensions (cm): 5 x 4 x 3

Meteorite Type: C2 Chondrite

 

Macroscopic Description: Roberta Score

Dull, black fusion crust covers about 40% of this carbonaceous chondrite fragment. Areas devoid of fusion crust are black with <1 mm sized irregular inclusions and chondrules. A 1 cm thick weathering rind was exposed along one surface. A minute amount of salt deposit is present in the interior.

 

Thin Section (,10) Description: Brian Mason

The section has a black matrix with numerous small (less than 0.1 mm) mineral grains and sparse chondrules (up to 0.6 mm across). Microprobe analyses show olivine generally close to Mg2SiO4 in composition, but also a few Fe-rich grains; pyroxene is less abundant than olivine, and most grains have compositions near MgSiO3. The meteorite is a C2 chondrite.

Data from:
  MB76
  Table 2
  Line 1696:
Origin or pseudonym:Texas Bowl
Mass (g):68.6
Class:CM2
Weathering grade:Be
Fayalite (mol%):0-39
Ferrosilite (mol%):0-7
Comments:NTL=2.4±0.5
Catalogs:
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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:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 16' 5"S, 156° 30' 49"E)
Note: the NHM and MetBase coordinates are 19.8 km apart

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