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1979—1985年,我们在南海进行海洋沉积调查时多次发现锰结核。结核有结核状、团粒状、生物状及结壳状等。主要分布于18°—21°31′N、115°—118°E的水深1500—4000m处,即外陆坡区及中央海盆区的北缘,呈不连续分布,其丰度变化较大。在宏观上,北部海区较南部海区分布广泛些,而海盆区又较陆坡区分布普遍。在区域分布上,不同的类型也有较睨显的差异。如:结核状主要分布于东沙群岛的东北部平缓的陆坡区;团粒状主要分布于中央海盆区;生物状则多分布于陆坡区及中、西沙群岛周围。
In 1979-1985, we found manganese nodules several times during the marine sediment survey in the South China Sea. Tuberculosis with tuberculosis, pellet, biological and crusty and so on. They are mainly distributed in the water depths of 1500-4000 m between 18 ° -21 ° 31’N and 115 ° -118 ° E, ie, the outer continental slope and the northern margin of the central basin region, which are discontinuous and their abundances vary greatly. In macroscopic view, the northern sea area is more widely distributed than the southern sea area, while the basin area is more widely distributed than the slope area. In the regional distribution, different types also have more obvious differences. For example, tuberculosis is mainly distributed in the gentle slopes of the northeastern part of the Dongsha Islands; the crumbs are mainly distributed in the central sea basin; and the living things are mostly distributed in the slopes and around the Xisha Islands.