西南印度洋中脊超慢速扩张的构造和岩浆活动特征

Characters of Magmatic Activity and Tectonics on the Ultraslow Spreading Ridge in the Southwest Indian Ocean

西南印度洋中脊是当前研究超慢速扩张中脊岩石圈增生模式和热液硫化物矿产资源的热点区域。本研究从西南印度洋中脊的扩张速率变化与全球地质历史事件的关系、岩浆活动强度及其不同尺度上的运移规律、热点-中脊交互作用的地质现象和地球物理特征等方面,系统总结了有关西南印度洋中脊的最新认识。针对以上内容,提出了进一步工作建议,如调查航次的区域与方法、岩浆构造活动与岩石圈状态的相互关系以及热点-中脊交互作用的动力学机制。

The Southwest Indian ridge has been the focus of studies on lithospheric accretion model of ultraslow spreading ridge and sulfide deposit resources. This review summarizes systematically the latest scientific results about the Southwest Indian ridge, including the relationship between the ocean ridge spreading rates and the global geological events, the intensity and the movement model of the magmatic activities with different scales, and the geological and geophysical characters of the hotspot-ridge interaction. The future researches are also suggested, which include the investigation regions and methods, the relationship between the magma-tectonic activities and the conditions of lithosphere and the dynamic mechanism of hotspot-ridge interaction.