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MacAlpine Hills 02747
Basic information Name: MacAlpine Hills 02747
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 02747
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 140.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 28(1)  (2005)  EL4
Meteoritical Bulletin:  MB 89  (2005)  EL4
MetBase:  v. 7.1  (2006)  EL4
Recommended:  EL4    [explanation]

This is 1 of 17 approved meteorites classified as EL4.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Writeuphelp
Writeup from AMN 28(1):
Sample No.: MAC 02747
Location: MacAlpine Hills
Field No.: 14178
Dimensions (cm):   5.8x3.9x4.2
Weight (g): 140.712
Meteorite Type: EL4 Chondrite
    MAC02747

Macroscopic Description: Cecilia Satterwhite
The exterior is covered with black/brown fusion crust over 60% of its surface. It is heavily oxidized and fractures are visible. The interior is black with rusty brown areas and minor metal is visible. Inclusions are mm sized and range in color from white to gray.

Thin Section (,2) Description: Linda Welzenbach, Tim McCoy

MAC 02747 - Cross-Polarized Light MAC02747 - Plane-Polarized Light
Cross-Polarized Light Plane-Polarized Light
The section shows an aggregate of distinct chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of metal, schreibersite, troilite, daubreelite and alabandite. Metal grains often contain euhedral pyroxene laths. Weathering is modest, with staining of some enstatite grains and minor alteration of metal and sulfides. Microprobe analyses show the pyroxene is Fs1-4 and metal contains very low concentrations of Si (~0.3 wt.%). The meteorite is an enstatite chondrite, probably an EL4.
Data from:
  MB89
  Table A1
  Line 490:
Origin or pseudonym:Bottom Lip
Mass (g):140.71
Class:EL4
Weathering grade:B/C
Ferrosilite (mol%):1-4
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:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)

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