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Elephant Moraine 83221
Basic information Name: Elephant Moraine 83221
     This is an OFFICIAL meteorite name.
Abbreviation: EET 83221
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 314 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 9(1)  (1986)  H4,6
Meteoritical Bulletin:  MB 76  (1994)  H4/6
NHM Catalogue:  5th Edition  (2000)  H4-6
MetBase:  v. 7.1  (2006)  H4-6
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  H4-6
Recommended:  H4-6    [explanation]

This is 1 of 98 approved meteorites classified as H4-6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 9(1):

Sample No.: EET83221

Location: Elephant Moraine

Weight (g): 313.9

Field No.: 1363

Dimensions (cm): 7 x 6 x 4

Meteorite Type: H4,6 Chondrite

 

Macroscopic Description: Carol Schwarz

Shiny iridescent remnant fusion crust occurs on this extensively weathered and fractured stone. The interior is reddish brown and no metal is visible.

 

Thin Section (,4) Description: Brian Mason

Visual examination of the section shows two contrasting lithologies: the larger area black, the smaller pale brown. Under the microscope the black area is seen to be highly chondritic and the pale brown area poorly chondritic with chondrules tending to merge with the granular groundmass. Weathering is extensive with red-brown veinlets of limonite throughout the section. Microprobe analyses show slightly variable compositions: olivine, Fa16-17; pyroxene, Fs14-16. The pale brown area contains maskelynite, with CaO content corresponding to An12, but with low Na 0, 0.8-4.6%. The black area can be classified as H4; the pale brown area as H6.

Data from:
  MB76
  Table 2
  Line 1486:
Origin or pseudonym:Main icefield
Mass (g):313.9
Class:H4/6
Weathering grade:C
Fayalite (mol%):17
Ferrosilite (mol%):15
Comments:26Al=42±4
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 9(1) (1986), 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° 19' 30"S, 157° 10' 42"E)
Note: the NHM and MetBase coordinates are 15.8 km apart

Statistics:
     This is 1 of 38940 approved meteorites from Antarctica (plus 5051 unapproved names)
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