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Elephant Moraine A79005
Basic information Name: Elephant Moraine A79005
     This is an OFFICIAL meteorite name.
Abbreviation: EETA79005
This meteorite may also be called Elephant Moraine 79005 (EET 79005) in publications.

Observed fall: No
Year found: 1979 or 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 451 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 342 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.: EETA79005

Location: Elephant Moraine

Field No.: 1046

Weight (gms): 450.9

Meteorite Type: Polymict Eucrite

 

Physical Description: Roberta Score

One surface of this achondrite is concave while the rest of the meteorite is convex. Fusion crust is visible only on one surface and it is very shiny and polygonally fractured. The matrix is medium gray in color and is speckled with light and dark clasts; the largest being 3 mm in diameter. Vugs are apparent all over the sample. Chipping a corner off the meteorite revealed one fine-grained black clast ~0.5 cm in diameter. The color of the interior matrix is considerably lighter gray in color than the exterior. Dimensions: 10.5 x 8 x 7 cm.

 

Petrographic Description: Arch Reid

The meteorite is a fine breccia of pyroxene and feldspar fragments with also a large number of small lithic clasts. The matrix is very fine grained; individual mineral fragments range up to 1.2 mm. Larger mineral fragments show evidence of deformation and some pyroxene grains show exsolution. Clast types include: 1) small dark aphanitic clasts, up to .7 mm; 2) fine grained eucrite fragments up to 1 mm, the most common clast type, and; 3) recrystallized eucrite, one clast 2.1 mm. There are also a few small fragments of brown devitrified glass. The pyroxenes analysed are all pigeonites, Wo7En59Fs34 to Wo14En35Fs52, with a range of Ca contents and Mg/Fe ratios. Feldspars range from Or.1Ab4An96to Or.7Ab16An83. No very high Mg pyroxenes were found and the meteorite is a polymict eucrite or a howardite.

Data from:
  MB76
  Table 2
  Line 1442:
Origin or pseudonym:Main icefield
Mass (g):450.9
Class:Eu "pm"
Weathering grade:A
Ferrosilite (mol%):30-61
Comments:26Al=63±3; 79005 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° 14' 22"E)
Note: the NHM and MetBase coordinates are 12.2 km apart

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