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Elephant Moraine 90299
Basic information Name: Elephant Moraine 90299
     This is an OFFICIAL meteorite name.
Abbreviation: EET 90299
Observed fall: No
Year found: 1990
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 8.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(2)  (1992)  E3
AMN 17(1)  (1994)  EL3
Meteoritical Bulletin:  MB 76  (1994)  EL3
NHM Catalogue:  5th Edition  (2000)  EL3
MetBase:  v. 7.1  (2006)  EL3
Recommended:  EL3    [explanation]

This is 1 of 22 approved meteorites classified as EL3.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites
Writeuphelp
Writeup from AMN 15(2):

Sample No.: EET90299

Location: Elephant Moraine

Field Number: 6358

Dimensions (cm): 2.6 x 2.1 x 0.8

Weight (g): 8.1

Meteorite Type: E3 chondrite

 

Macroscopic Description: Robbie Marlow

The exterior surface of EET90299 is brown, shiny and smooth. The interior matrix is fine-grained and has a dark brown to black color. Oxidation is heavy and has masked any features present.

 

Thin Section (,2) Description: Brian Mason

The section consists mostly of chondrules and chondrule fragments, up to 1.8 mm across; they are made up of granular or radiating pyroxene. The opaque material consists largely of nickel-iron with minor sulfides. Weathering is extensive, with limonitic staining and areas of brown limonite throughout the section. Remnants of fusion crust rim the section. Microprobe analyses show that most of the pyroxene is close to MgSiO3 in composition, but FeO contents up to 5.3% were recorded; the mean composition is Fs2.4. The nickel-iron contains up to 0.5% Si. One grain of silica polymorph, probably tridymite, was analyzed. The meteorite is an enstatite chondrite, and the variable pyroxene composition suggests the E3 classification.

 

Data from:
  MB76
  Table 2
  Line 2331:
Origin or pseudonym:Texas Bowl
Mass (g):8.1
Class:EL3
Weathering grade:C
Fayalite (mol%):¾
Ferrosilite (mol%):0.2-8
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 15(2) (1992), 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' 45"S, 156° 26' 36"E)
Note: the NHM and MetBase coordinates are 22 km apart

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