中生代或第三纪早期形成的地中海岩溶型铝土矿是一水型铝土矿。显然,这是三水铝土矿经海解作用和成岩作用改造而成的。在一种简单地槽盆地(古地中海)中,直到最近才完成沉积作用的这种铝土矿来源于下覆灰岩。新近堆积的三水型岩溶铝土矿,是原生铝土矿,它来源并且堆积于晚第三纪灰岩之上。在加勒比海和太平洋的岛弧上也发现这种铝土矿。近 Mediterranean karst bauxite formed in the Mesozoic or Early Tertiary is a water-based bauxite. Obviously, this is the transformation of Sanshui bauxite by sea-solution and diagenesis. In a simple basin (ancient Mediterranean), the bauxite, which had only recently been deposited, originated from underburden limestone. The newly deposited trihydrate karst bauxite is a native bauxite that originates and accumulates on the late Tertiary limestone. This bauxite is also found on island arcs in the Caribbean and Pacific Oceans. near