Gravity Survey on the Mizuho Plateau, East Antarctica: SEAL Seismic Exploration in 2001-2002

• 作者: Atsushi Watanabe Hiroki Miyamachi Masaki Kanao Masamitsu Takada Mikiya Yamashita Shigeru Toda Takeshi Matsushima
• 来源期刊: 地球科学国际期刊(英文)
• 学科: 医学
• 关键词: GRAVITY Survey Mizuho PLATEAU BEDROCK ELEVATION Bouguer GRAVITY ANOMALY CRUSTAL Thickness
• 年，卷（期）: 2014,（2）
• 页码范围: 146-155
• 页数: 10页
• 分类号: R73

摘要

A gravity survey on Mizuho Plateau was carried out in austral summer of 2001-2002 by the 43rd Japanese Antarctic Research Expedition (JARE-43), as one of the geophysical measurements of deep seismic exploration. Gravity measurements were conducted at 151 points in approximately 1 km interval along the 150 km profile. Considering the gravity effect from the ice-sheet, Free-air and Bouguer anomalies were calculated by using precise GPS locations. Furrowed and basin-like negative Free-air anomalies were observed in middle and northern parts of the profile. Bouguer anomalies were calculated by two bedrock elevation data obtained from seismic refraction and radio-echo sounding. High resolution model for bedrock elevation by radio-echo sounding was applied in determining the crustal thickness.