Metallographic and Magnetic Properties of Antarctic Meteorites: Allan Hills A77255, Derrick Peak A78003 and A78007, and Russian Meteorite Sikhote-Alin

The metallographic and magnetic properties of three iron meteorites from Victoria Land in Antarctica have been studied along with similar analyses of the Russian meteorite Sikhote-Alin. Allan Hills A77255 contains 12.2% Ni, 0.61% Co, and 0.026% P, and consists of a fine intergrowth of kamacite spind...

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Bibliographic Details
Main Authors: R.M. Fisher, A. Szirmae, Takesi Nagata
Format: Report
Language:English
Published: U.S. Steel Corp., Research Laboratory 1980
Subjects:
Antarctic
Victoria Land
Allan Hills
Derrick Peak
Antarc*
Antarctica
Memoirs of National Institute of Polar Research
Polar Research
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1107
http://id.nii.ac.jp/1291/00001107/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1107&item_no=1&attribute_id=18&file_no=1
Description
Summary:The metallographic and magnetic properties of three iron meteorites from Victoria Land in Antarctica have been studied along with similar analyses of the Russian meteorite Sikhote-Alin. Allan Hills A77255 contains 12.2% Ni, 0.61% Co, and 0.026% P, and consists of a fine intergrowth of kamacite spindles in a microplessitic matrix. Derrick Peak A78003 contains 5.4% Ni, 0.51% Co, and 0.40% P, and was heavily deformed during entry through the earth's atmosphere. Derrick Peak A78007 contains 7.3% Ni, 0.38% Co, and 0.75% P. Extensive shear deformation of schreibersite veins and the occurrence of some comb plessite are evident in the structure. The iron meteorite Sikhote-Alin is a heavily deformed, coarse octahedrite containing 5.94% Ni, 0.38% Co, and 0.46% P.

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