Meteoritical Bulletin: Entry for Elephant Moraine 16199

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Elephant Moraine 16199

Basic information

Name: Elephant Moraine 16199
This is an OFFICIAL meteorite name.
Abbreviation: EET 16199
Observed fall: No
Year found: 2016
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 0.7 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 40(2)	(2017)	Winonaite
Meteoritical Bulletin:	MB 106	(2018)	Winonaite
Recommended:			Winonaite [explanation]

This is 1 of 85 approved meteorites (plus 1 unapproved name) classified as Winonaite. [show all]
Search for other: Primitive achondrites, Winonaites

Comments:

Approved 12 Sep 2017

Writeup

help

Writeup from AMN 40(2):

Sample Number

EET 16199

Newsletter

40,2

Location

Elephant Moraine

Field Number

24428

Dimensions

1.3 x 1.0 x 0.4

Weight

0.67

Original Classification

Winonaite

Mineral Composition (%Fa & %Fs)

Fayalite (mol%): 6-9;Ferrosilite (mol%): 1-7

Ce

B

Macroscopic Description - Doug Ross

90% of the exterior has brown fusion crust, one surface is highly vesicular with evaporites. The dark brown/gray interior matrix has large gray chondrules/inclusions.

Thin Section Description (,,2) - Cari Corrigan, Tim McCoy

The section is dominated by silicates with abundant metal occurring as veins, networks and blebs up to 1 mm in size, with minor troilite. Graphite appears to be absent. The silicates include olivine (Fa_6-9), pyroxene (Fs_1-7Wo_1-2), and feldspar. The combination of low-FeO mafics and abundant metal suggests this meteorite is tentatively classified as a winonaite, although it lacks features common to winonaites (graphite and daubreelite). Further studies are warranted to confirm the classification.

Antarctic Meteorite Images for Sample EET 16199

Thin Section Photo of Sample EET 16199 in Plane-Polarized Light with 2.5X Magnification

Thin Section Photo of Sample EET 16199 in Reflected Light with 2.5X Magnification

Thin Section Photo of Sample EET 16199 in Cross-Polarized Light with 2.5X Magnification

Thin Section Photo of Sample EET 16199 in Plane-Polarized Light with 5X Magnification

Thin Section Photo of Sample EET 16199 in Reflected Light with 5X Magnification

Thin Section Photo of Sample EET 16199 in Cross-Polarized Light with 5X Magnification

Data from:
  MB106
  Table 0
  Line 0:

Date:	2016
Mass (g):	0.7
Pieces:	1
Class:	Winonaite
Weathering grade:	Ce
Fayalite (mol%):	6-9
Ferrosilite (mol%):	1-7
Classifier:	SI
Type spec mass (g):	0.7
Type spec location:	JSC
Main mass:	JSC
Finder:	ANSMET
Comments:	Submitted by AMN

Institutions
and collections

JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022)
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)

Catalogs:

Search for this meteorite in the NASA/JSC database (U.S.):

References:

Published in Antarctic Meteorite Newsletter 40(2) (2017), JSC, Houston
Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

Find references in NASA ADS:
Find references in Google Scholar:

Geography:

Antarctica

Antarctica

Coordinates:

Unknown.

Statistics:
This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)

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