Geology of the Belgica Mountains

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概要

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• The Belgica Mountains lie at the east end of the East Queen Maud Land, located at 72°18'S-72°43'S latitude and 30°57'E-31°20'E longitude. Crystalline basement rocks of this area are the Belgica group which is divided into the Belgica upper formation and the Belgica lower formation. Geological map and sections are given. Various rock types constitute the Belgica group : They are (1) granitic gneiss, (2) marble and skarn, (3) amphibolite, (4) hornblende-biotite gneiss, (5) augen gneiss, (6) clinopyroxene gneiss, (7) garnet-biotite gneiss, and (8) dyke rocks (basic-metadyke, syenite, granodiorite-diorite and pink granite). Brief petrography of these rock types includes 16 bulk chemical analyses. The results of 6 whole rocks K-Ar dating range from 382 to 472Ma suggesting that the metamorphism in these mountains occurred during the early Palaeozoic time. Gentle to open folds with wave length of several kilometers of two generations are developed throughout the region.

• 国立極地研究所の論文

著者

• Nishida Tamio

  Institute Of Earth Science Faculty Of Education Saga University

• KOJIMA Hideyasu

  National Institute of Polar Research

• Yanai Keizo

  National Institute of Polar Research

• Kojima Hideyasu

  Institute of Mining Geology, Mining College, Akita Universitysearch

• Kojima Hideyasu

  Institute Of Mining Geology Mining College Akita University

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