Meteoritical Bulletin: Entry for Elephant Moraine 90916

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Elephant Moraine 90916

Basic information

Name: Elephant Moraine 90916
This is an OFFICIAL meteorite name.
Abbreviation: EET 90916
Observed fall: No
Year found: 1990
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 4.6 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 17(3)	(1994)	L3.6
Meteoritical Bulletin:	MB 79	(1996)	L3.6
NHM Catalogue:	5th Edition	(2000)	L3.6
MetBase:	v. 7.1	(2006)	L3.6
Recommended:			L3.6 [explanation]

This is 1 of 62 approved meteorites classified as L3.6. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Writeup

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Writeup from AMN 17(3):

Sample No.: EET90909; 90916
Location: Elephant Moraine
Dimensions (cm): 1.7 x 1.4 x 1.2; 2.2 x 1.3 x 1.2
Weight (g): 6.4; 4.6
Meteorite Type: L3 chondrite (estimated L3.6)

Macroscopic Description: Cecilia Satterwhite
Black fusion crust covers ninety percent of each of these specimens. Oxidation haloes are present in the fusion crust of 90909. The interior of both specimens is dark brown to black with areas of extensive oxidation. Light and dark inclusions are abundant and range in size from 1 mm to 3 mm.

Thin Section (EET90909,2; 90916,2) Description: Brian Mason
The sections are so similar that a single description suffices; the meteorites are probably paired. Chondrules and chondrule fragments, up to 2.9 mm across, are abundant, and are set in a black matrix which contains a little nickel-iron and troilite. Considerable weathering is indicated by brown limonitic staining throughout the sections. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa1-22, mean Fa12: pyroxene, Fs2-23. The meteorites are classified as L3 chondrites (estimated L3.6).

Data from:
  MB79
  Table 2
  Line 127:

Origin or pseudonym:	Texas Bowl
Mass (g):	4.6
Class:	L3.6
Weathering grade:	B/C
Fayalite (mol%):	2-19
Ferrosilite (mol%):	2-23
Comments:	90909 pairing group

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
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References:

Published in Antarctic Meteorite Newsletter 17(3) (1994), JSC, Houston
Published in Meteoritical Bulletin, no. 79, MAPS 31, A161-A174 (1996)

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Geography:

Antarctica

Antarctica

Coordinates:
Catalogue of Meteorites:	(76° 11'S, 157° 10'E)
Recommended::	(76° 15' 57"S, 156° 30' 26"E)

Note: the NHM and MetBase coordinates are 19.8 km apart

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

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