Meteoritical Bulletin: Entry for MacAlpine Hills 02820

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MacAlpine Hills 02820

Basic information

Name: MacAlpine Hills 02820
This is an OFFICIAL meteorite name.
Abbreviation: MAC 02820
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 0.21 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 28(1)	(2005)	CM1-2
Meteoritical Bulletin:	MB 89	(2005)	CM1-2
MetBase:	v. 7.1	(2006)	CM1/2
Antarctic Meteorite Newsletter:	AMN 31(1)	(2008)	CM1/2
Recommended:			CM1/2 [explanation]

This is 1 of 26 approved meteorites classified as CM1/2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 1), CM chondrites, and CM-CO clan chondrites

Comments:

Field number: 14428

Writeup

Writeup from AMN 28(1):

Sample No.:	MAC 02820
Location:	MacAlpine Hills
Field No.:	14428
Dimensions (cm):	0.75x0.5x0.5
Weight (g):	0.212
Meteorite Type:	CM1-2 Chondrite

Macroscopic Description: Kathleen McBride
25% of the exterior is covered with thick brown/black fusion crust. The interior is a gray matrix with rusty areas and gray chondrules.

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

Plane-Polarized Light

The section consists of a single unaltered olivine in a groundmass of hydrated phyllosilicates, including those that replace chondrules. Olivine is Fa₂. The matrix consists dominantly of an Fe-rich serpentine. The meteorite is a CM chondrite intermediate between petrologic types 1 and 2.

Data from:
  MB89
  Table A1
  Line 550:

Origin or pseudonym:	Bottom Lip
Mass (g):	0.21
Class:	CM1-2
Weathering grade:	B
Fayalite (mol%):	2

Catalogs:

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

References:

Published in Antarctic Meteorite Newsletter 28(1) (2005), JSC, Houston
Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)

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Photos:

Credit	Photos
Photographs from AMN:
Photograph from unknown source	A photo is in the write-up above

Geography:

Antarctica

Coordinates:
Recommended::	(84° 18' 56"S, 159° 43' 16"E)

Statistics:
This is 1 of 44048 approved meteorites from Antarctica (plus 3802 unapproved names)

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