Geology and Geologic Structure of the Langhovde and Skarvsnes Regions, East Antarctica

• Main Authors: Yukio Matsumoto, Masaru Yoshida, Keizo Yanai
• Format: Report
• Language: English
• Published: Department of Geology, Faculty of Liberal Arts, Nagasaki University 1979
• Subjects: East Antarctica; Ongul; Langhovde; Skarvsnes; Antarc*; Antarctica; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1025; http://id.nii.ac.jp/1291/00001025/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1025&item_no=1&attribute_id=18&file_no=1

The Langhovde and Skarvsnes regions lie on the east coast of Lutzow-Holm Bay, East Antarctica. These regions are bounded by latitude 69°10'S-69°32'S and longitude 39°27'E-39°53'E. In the Langhovde and Skarvsnes regions is distributed the Ongul group named by YOSHIDA et al. (Third Symp. Antarct. Geol. Geophys., Madison, Univ. Wisconsin, 1977b). The Ongul group is characterized by alternating layers of gneissic rocks of the late Precambrian time. The gneissic rocks exposed in these regions are classified as follows : (1) Metabasites, (2) Charnockitic rocks, (3) Hornblend gneiss, (4) Marble, (5) Garnet-biotite gneiss, (6) Porphyroblastic gneiss, (7) Garnet gneiss, (8) Migmatitic gneiss, (9) Garnet-bearing granitic gneiss, (10) Microcline granite and gneissose microcline granite and (11) Pegmatite. Many types of folds and fractures in the Langhovde and Skarvsnes regions are divided into four stages; the first stage (D_1) : recumbent folds followed by isoclinal folds with the axis running in the north-south direction, the second stage (D_2) : closed to open folds with the east-west trend, the third stage (D_3) : gentle folds with northery trend, and the fourth stage (D_4) : diagonal sets of fractures trending N65°W and N60°E.