Meteoritical Bulletin: Entry for Miller Range 15305

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Miller Range 15305

Basic information

Name: Miller Range 15305
This is an OFFICIAL meteorite name.
Abbreviation: MIL 15305
Observed fall: No
Year found: 2015
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 3.23 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 42(2)	(2019)	CM2
Meteoritical Bulletin:	MB 108	(2020)	CM2
Recommended:			CM2 [explanation]

This is 1 of 541 approved meteorites classified as CM2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites

Comments:

Approved 14 Aug 2019

Writeup

help

Writeup from AMN 42(2):

Sample Number

MIL 15305

Newsletter

42,2

Location

Miller Range

Field Number

24046

Dimensions

1.6 x 1.5 x 1.0

Weight

3.23

Original Classification

CM2 Chondrite

Pairing

MIL 15300; MIL 15301; MIL 15302; MIL 15305; MIL 15450; MIL 15479; MIL 15489

Mineral Composition (%Fa & %Fs)

Fayalite (mol%): 1-39

B

A

Macroscopic Description - Cecilia Satterwhite

Fractured black/brown fusion crust covers most of the exterior. Areas without fusion crust are black with some evaporites and white specks. The interior is black matrix with light specks and minor oxidation.

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

The sections consist of a few small chondrules (up to 0.5 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa_1-52, pyroxene is Fs_5-25. Aqueous alteration of the matrix is substantial, but the chondrules are extensively altered, apparently more so than those we group with MIL 15303, although this distinction may reflect the particular sections examined rather than real differences between these groups of meteorites. The meteorite is a CM2 chondrite.

Antarctic Meteorite Images for Sample MIL 15305

Thin Section Photo of Sample MIL 15305 in Plane-Polarized Light with 5X Magnification

Thin Section Photo of Sample MIL 15305 in Cross-Polarized Light with 2.5X Magnification

Thin Section Photo of Sample MIL 15305 in Cross-Polarized Light with 5X Magnification

Thin Section Photo of Sample MIL 15305 in Reflected Light with 5X Magnification

Thin Section Photo of Sample MIL 15305 in Plane-Polarized Light with 2.5X Magnification

Thin Section Photo of Sample MIL 15305 in Reflected Light with 2.5X Magnification

Lab Photo of Sample MIL 15305

Data from:
  MB108
  Table 0
  Line 0:

State/Prov/County:	Antarctica
Date:	2015
Latitude:	-83.5222
Longitude:	157.259
Mass (g):	3.233
Pieces:	1
Class:	CM2
Weathering grade:	B
Fayalite (mol%):	1-39
Classifier:	SI
Type spec mass (g):	3.233
Type spec location:	JSC
Main mass:	JSC
Finder:	ANSMET
Comments:	Submitted by AMN

Institutions
and collections

JSC: Mailcode KT, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 3 Sep 2013)
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::	(83° 31' 20"S, 157° 15' 32"E)

Statistics:
This is 1 of 239 approved meteorites from Antarctica, Antarctica
This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names)

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