汤加-克马德克海沟重力异常特征及其地质研究意义
Gravity Anomaly Characteristics of Tonga-Kermadec Trench and its Geological Significance
杨浩宇 1曹海港 1彭文宣1
作者信息
- 1. 陕西省西安市西安石油大学地球科学与工程学院,陕西西安 710065
- 折叠
摘要
位于西南太平洋板块和澳大利亚板块之间的汤加-克马德克海沟是地球动力学研究的最重要地区之一.根据全球卫星重力异常数据库获取卫星测高重力异常和海底地形数据,基于Surfer软件绘制图像对汤加-克马德克海沟进行初步分析.结果显示:汤加-克马德克海沟的重力场主要分布具有不对称的V字形横剖面,其海洋一侧坡度较缓,陆地一侧坡度较陡;沿着汤加-克马德克俯冲带弧向海洋延伸的路径上,可以观察到大规模的正断层现象.
Abstract
The Tonga-Kermadec Trench,located between the Southwest Pacific Plate and the Australian Plate,is one of the most important areas for geodynamic research.Based on the global satellite gravity anomaly database,the data of gravity anomaly and sea floor topography are obtained,and a preliminary analysis of Tonga-Kermadec Trench is carried out based on Surfer software.The results show that the gravity field of the Tonga-Kermadec Trench is mainly distributed in an asymmetrical V-shaped cross section,with a gentle slope on the ocean side and a steep slope on the land side.Large-scale normal faults can be observed tectonically from the pre-arc path to the ocean located in the Tonga-Kermadec subduction zone to the subducted Pacific plate.
关键词
汤加-克马德克海沟/重力特征/地质意义/重力异常Key words
tonga-kermadec trench/gravity characteristics/geological significance/gravity anomaly引用本文复制引用
出版年
2024
NETL
NSTL
万方数据