The following exracts from my college physics book ("Physics for Scientists and Engineers") might shed further light on the subject.

p.298: "... Archimedes' principle: the buoyant force on a body immersed in a fluid is equal to the weight of the fluid displaced by that object."

p.299: "Archimedes' principle applies equally well to objects that float, such as wood. In general, an object floats on a fluid if its density is less than that of the fluid. For example, a log whose specific gravity is 0.60 and whose volume is 2.0 m3 will have a mass of 1200 kg. If the log is fully submerged, it will displace a mass of water m = (density)V = (1000 kg/m3)(2.0 m3) = 2000 kg. Hence the buoyant force on it will be greater than its weight, and it will float to the top. It will come the equilibrium when it displaces 1200 kg of water, which means that 1.2 m3 or 0.60 of its volume will be submerged. In general, the fraction of the object submerged is given by the ratio of the object's density to that of the fluid."

>> So 1m Kg of ice DISPLACES more than 1 m litres of seawater.
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>I don't agree with this part. If it were pushed forcefully under water, it would displace water according to its volume. But if it is left to float freely, the ice block would displace exactly the amount of water it weighs.
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>IOW, the ice block indeed has a volume of 90,000 liters (or litres) more than when it is in the liquid form. But those 90,000 liters are above the surface.