Geology of the Minami-Yamato Nunataks, East Antarctica

The Minami-Yamato Nunataks are situated at 71.9°-72.1°S latitude and 35.1°-35.3°E longitude, 40km southwest of the Yamato Mountains. The basement rocks exposed in this area are classified as follows : (1) Granitic gneiss, (2) Hornblende-biotite gneiss, (3) Clinopyroxene-biotite gneiss, (4) Basic dik...

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Bibliographic Details
Main Author: Takayoshi Katsushima
Format: Report
Language:English
Published: Department of Geology and Mineralogy, Faculty of Science, Hokkaido University 1984
Subjects:
East Antarctica
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=1650
http://id.nii.ac.jp/1291/00001650/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1650&item_no=1&attribute_id=18&file_no=1
Description
Summary:The Minami-Yamato Nunataks are situated at 71.9°-72.1°S latitude and 35.1°-35.3°E longitude, 40km southwest of the Yamato Mountains. The basement rocks exposed in this area are classified as follows : (1) Granitic gneiss, (2) Hornblende-biotite gneiss, (3) Clinopyroxene-biotite gneiss, (4) Basic dikes, (5) Acidic dikes. The gneissic rocks subjected to amphibolite facies metamorphism were intruded by various dike rocks, which are subdivided into basic dike I, acidic dikes, basic dike II in order of their emplacement. Basic dike rocks were also metamorphosed. On the basis of their modes of occurrences and petrographic features it can be concluded that the rocks composing the Minami-Yamato Nunataks are correlated with those of Massifs B and C in the Yamato Mountains.

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