A PRELIMINARY SURVEY BY A SEISMIC PROFILING ACROSS THE GUNNERUS RIDGE OFF THE RIISER-LARSEN PENINSULA, ANTARCTICA

• Main Authors: モリワキ キイチ, マツオカ ノリカズ, ヨシダ ヨシオ, Kiichi MORIWAKI, Norikazu MATSUOKA, Yoshio YOSHIDA
• Format: Report
• Language: English
• Published: National Institute of Polar Research 1987
• Subjects: East Antarctica; Riiser-Larsen; Gunnerus Ridge; Riiser-Larsen Peninsula; Antarc*; Antarctica; Ice Sheet
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2531; http://id.nii.ac.jp/1291/00002531/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2531&item_no=1&attribute_id=18&file_no=1

The following conclusion can be drawn from the interpretation of sparker sonic prospecting records obtained on the Gunnerus Ridge, off the Riiser-Larsen Peninsula, East Antarctica. 1) The Gunnerus Ridge may be a horst composed of a continental crust, 2) a graben-like depression lies to the east of the ridge, and it seems to be connected with the inferred fault system in the central part of Lutzow-Holm Bay, 3) topography or sediments on the ridge appear not to have been deformed by glaciation, suggesting that the maximum expansion of the past ice sheet might not have reached so far as 67°45'S in latitude on the Gunnerus Ridge 725m in present depth.