Meteoritical Bulletin: Entry for Dominion Range 18262

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Dominion Range 18262

Basic information

Name: Dominion Range 18262
This is an OFFICIAL meteorite name.
Abbreviation: DOM 18262
Observed fall: No
Year found: 2018
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 6.8 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 42(2)	(2019)	Lunar (bas. breccia)
Meteoritical Bulletin:	MB 108	(2020)	Lunar (bas. breccia)
Recommended:			Lunar (bas. breccia) [explanation]

This is 1 of 20 approved meteorites classified as Lunar (bas. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 14 Aug 2019

Writeup

help

Writeup from AMN 42(2):

Sample Number

DOM 18262

Newsletter

42,2

Location

Dominion Range

Field Number

24951

Dimensions

2.0 x 1.5 x 1.2

Weight

6.78

Original Classification

Lunar-Basaltic Breccia

Pairing

DOM 18262; DOM 18509; DOM 18543; DOM 18666; DOM 18678

Mineral Composition (%Fa & %Fs)

Fayalite (mol%): 71-95;Ferrosilite (mol%): 29-79

A/B

A

Macroscopic Description - Cecilia Satterwhite

The exterior has black patches of fusion crust on a brown rusty exterior with some white specks visible. The fine grained black matrix has abundant white/tan inclusions with minor oxidation.

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

These sections are similar enough that one description will suffice. These sections consist of a highly brecciated assemblage of mostly single mineral grains ranging up to 0.5 mm in size. Grains are dominated by pyroxene and plagioclase with rare large olivine fragments. Polymineralic igneous fragments/clasts include coarse grained gabbro and symplectites. Melt veins and pockets were observed in all sections. DOM 18262 contains a fine grained apparently anorthositic fragment (~2 mm in max dimension) and a few melt droplets (approx. 100 microns in diameter) were observed. Olivines are fayalitic (Fa_90-99), although two grains of Fa₅₆ and Fa₇₁ were analyzed. Pyroxene is dominantly pigeonite with fine exsolution, with orthopyroxene of Fs₂₇Wo₃ and augite Fs₅₀Wo₄₀. Rare high-FeO pigeonite (up to Fs₈₀) is observed associated with the symplectite. Fe/Mn of pyroxenes ranges from ~50-70. Plagioclase is calcic with An90-₉₇Or₀._1-0.₇. These meteorites are lunar basaltic breccias, likely regolith breccias.

Antarctic Meteorite Images for Sample DOM 18262

Thin Section Photo of Sample DOM 18262 in Cross-Polarized Light with 2.5X Magnification

Thin Section Photo of Sample DOM 18262 in Plane-Polarized Light with 2.5X Magnification

Lab Photo of Sample DOM 18262 Displaying East Orientation

Lab Photo of Sample DOM 18262

Lab Photo of Sample DOM 18262 Displaying West Orientation

Lab Photo of Sample DOM 18262 Displaying South Orientation

Lab Photo of Sample DOM 18262 Displaying North Orientation

Lab Photo of Sample DOM 18262 Displaying Bottom Orientation

Data from:
  MB108
  Table 0
  Line 0:

State/Prov/County:	Antarctica
Date:	2018
Latitude:	-85.6486
Longitude:	167.1190
Mass (g):	6.777
Pieces:	1
Class:	Lunar (bas. breccia)
Weathering grade:	A/B
Fayalite (mol%):	71-95
Ferrosilite (mol%):	29-79
Classifier:	SI
Type spec mass (g):	6.777
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 42(2) (2019), JSC, Houston
Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Antarctica

Antarctica

Coordinates:
Recommended::	(85° 38' 55"S, 167° 7' 8"E)

Statistics:
This is 1 of 43840 approved meteorites from Antarctica (plus 3802 unapproved names)

Proximity search:

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