大西洋中脊(MAR)为慢速扩张脊,以赤道附近的Romanche Trench海沟为界,分为北大西洋脊(NMAR)和南大西洋脊(SMAR),两者在扩张速率、脊轴形态、岩石圈结构等方面都表现出相似性。最早对MAR开展的热液调查可追溯到上世纪70年代的TAG(Trans-Atlantic Geotraverse)计划,之后美、法、俄等国对NMAR开展了大量的调查,发现了一系列热液区。而对于SMAR,调查研究则相对薄 The mid-ocean ridge (MAR) is a slow-spreading ridge divided into North Atlantic Ridges (NMAR) and Southern Atlantic Ridges (SMAR) bounded by the Romanche Trench trench near the equator, Structure and other aspects of the show similarities. The earliest hydrothermal survey carried out by MAR dates back to the Trans-Atlantic Geotraverse (TAG) program of the 1970s. After that, the United States, France and Russia conducted extensive surveys on the NMAR and found a series of hydrothermal zones. For SMAR, the survey is relatively thin