Yamato-74662 Meteorite: A Carbonaceous Chondrite Type II

Preliminary chemical analysis of Yamato-74662 meteorite suggests that this meteorite belongs to carbonaceous chondrite Type II. No other meteorites of this type have been found among Antarctic meteorites which run to about one thousand. Yamato-74662 meteorite was collected from the surface of bare i...

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Bibliographic Details
Main Authors: Keizo Yanai, Hiroshi Haramura
Format: Report
Language:English
Published: National Institute of Polar Research 1978
Subjects:
Antarctic
Yamato
Antarc*
Antarctica
Memoirs of National Institute of Polar Research
Polar Research
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=897
http://id.nii.ac.jp/1291/00000897/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=897&item_no=1&attribute_id=18&file_no=1
Description
Summary:Preliminary chemical analysis of Yamato-74662 meteorite suggests that this meteorite belongs to carbonaceous chondrite Type II. No other meteorites of this type have been found among Antarctic meteorites which run to about one thousand. Yamato-74662 meteorite was collected from the surface of bare ice in the Meteorite Ice Field near southern Yamato Mountains, Antarctica on December 30,1974. The bulk chemical composition of Yamato-74662 meteorite in weight % is as follows : 29.18% SiO_2,0.22% TiO_2,2.38% (Al)_2O_3,22.53% FeO, 7.38% FeS, 0.22% MnO, 19.29% MgO, 1.70% CaO, 0.28% (Na)_2O_2,0.04% K_2O, 1.56% H_2O(-), 13.26% H_2O(+), 0.23% P_2O_5,0.85% NiO, 0.52% (Cr)_2O_3,(0.05)_9% Co.

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