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Elephant Moraine A79011
Basic information Name: Elephant Moraine A79011
     This is an OFFICIAL meteorite name.
Abbreviation: EETA79011
This meteorite may also be called Elephant Moraine 79011 (EET 79011) in publications.

Observed fall: No
Year found: 1979 or 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 86.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 3(3)  (1980)  Eucrite or howardite
AMN 4(1)  (1981)  Eucrite-pmict
Meteoritical Bulletin:  MB 76  (1994)  Eucrite-pmict
NHM Catalogue:  5th Edition  (2000)  Eucrite-pmict
MetBase:  v. 7.1  (2006)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 341 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from AMN 3(3):
This text was reprinted from AMN 3(3) in AMN 4(1). In some cases, it may be an updated version from the original.

Sample No.: EETA79011

Location: Elephant Moraine

Field No.: 1040

Weight (gms): 86.4

Meteorite Type: Polymict Eucrite

 

Physical Description: Roberta Score

A patch of dull black fusion crust appears only on one surface. The rest of this achondrite is medium-gray in color. Several types of clasts are visible on the exterior with the largest one being ~0.7 cm in its longest dimension. The interior revealed through chipping is lighter gray in color than the exterior and contains many clasts. This achondrite looks similar to other eucrites already processed from 1979, 1978 and 1977 collection.

 

Petrographic Description: Arch Reid

The thin section shows a fine breccia with highly angular small monomineralic pyroxene and feldspar clasts predominating. Pyroxene grains range up to 2.5 mm with the large fragments showing evidence of deformation. Some single pyroxene fragments show exsolution textures. Among the small lithic clasts present are included: 1) fragments of brown devitrified glass, up to 1.6 mm; 2) fine grained eucrite clasts with granoblastic texture, up to .6 mm; 3) fine grained eucrite fragments, up to .7 mm and; 4) medium grained eucrite up to 1.6 mm. Pyroxenes have a range of compositions from Wo4En67Fs30 to Wo2En37Fs61. The more magnesian pyroxenes all have low Ca contents but the more Fe-rich varieties range from Wo2En37Fs61to Wo35En27Fs38. Feldspar ranges in composition from Or.2Ab7An93 to Or1.5Ab19An80. The meteorite is classified as a polymict eucrite or a howardite.

Data from:
  MB76
  Table 2
  Line 1447:
Origin or pseudonym:Main icefield
Mass (g):86.4
Class:Eu "pm"
Weathering grade:B
Ferrosilite (mol%):30-61
Comments:26Al=79±6; 79004 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 3(3) (1980), 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° 17' 28"S, 157° 13' 18"E)
Note: the NHM and MetBase coordinates are 12.1 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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