南桑威奇板块,或南桑威奇微板块(英语:South Sandwich Plate),是一个微板块,位于南大西洋和南冰洋的交界处。它呈弧形,弧顶指向东方,东界以消减带和南美洲板块相邻,南界亦以消减带和南极洲板块相邻,西界则以离散边界和斯科舍板块相接。
南桑威奇群岛即位于这个小型的板块之上。
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