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Elephant Moraine 99430
Basic information Name: Elephant Moraine 99430
     This is an OFFICIAL meteorite name.
Abbreviation: EET 99430
Observed fall: No
Year found: 1999
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 27.1 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  CK4
Antarctic Meteorite Newsletter:  AMN 24(1)  (2001)  CK4
Meteoritical Bulletin:  MB 85  (2001)  CK4
MetBase:  v. 7.1  (2006)  CK4
Recommended:  CK4    [explanation]

This is 1 of 104 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Writeuphelp
Writeup from AMN 24(1):
Sample No.: EET 99430
Location: Elephant Moraine
Field No.: 12395
Dimensions (cm):   4.0x3.0x1.5
Weight (g): 27.068
Meteorite Type: CK4 Chondrite
    EET99430

Macroscopic Description: Kathleen McBride
The entire exterior surface of this carbonaceous chondrite is covered with thick black fusion crust with polygonal fractures. The interior is black, earthy material with a sulfurous odor. This meteorite has an oxidation rind and rust halos.

Thin Section (, 4) Description: Tim McCoy and Linda Welzenbach

EET 99430 - Plane-Polarized Light EET 99430 - Cross-Polarized Light
Plane-Polarized Light Cross-Polarized Light
The section consists of large (up to 2 mm), well-defined chondrules in a matrix of finer-grained silicates, sulfides and abundant magnetite. The meteorite is extensively shocked and brecciated. Olivine is relatively homogeneous Fa30-33. In this section, we observed a 1.5 by 2 mm CAI consisting of anorthite, fassaite and pleonaste spinel. A very unusual feature of this meteorite is the presence of FeO-rich phyllosilicates, which occur as veins and patches. The phyllosilicates also appear to cross cut the brecciated texture and are sometimes associated with magnetite. The origin of these phyllosilicates (terrestrial vs. extraterrestrial; timing relative to metamorphism and brecciation) is uncertain. The meteorite is a CK4 chondrite. However, phyllosilicates have not been previously reported in CK chondrites and large CAIs are very rare. This specimen is clearly very unusual.
Data from:
  MB85
  Table A1
  Line 50:
Origin or pseudonym:Main icefield
Mass (g):27.1
Class:CK4
Weathering grade:C
Fayalite (mol%):30-33
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 24(1) (2001), JSC, Houston
Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Photos:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
Dr Carlton Allen, JSC-KT, NASA      
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 11'S, 157° 10'E)
     Recommended::   (76° 11'S, 157° 10'E)

Statistics:
     This is 1 of 38674 approved meteorites from Antarctica (plus 5051 unapproved names)
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