加拿大安大略地区的萨德伯里杂岩体可能是地球上最有价值的火成岩体。最初,该岩体开采过铜矿,但是它也富含镍,而且是现今世界上产量最大的独立镍矿床。此外,它还提供了大量具经济价值的钴、铱、锇、钯、铂、铑、钌等金属。然而,这种似梭状构造是怎样产生的呢?20多年前,Dietz(Journal of Geology,V.72,p.412,1964)曾提出,该构造可能是由巨大的陨石冲击而成的。据他的见解,这样的冲击可能使地壳发生了破裂,并使地壳深部生 The Sudbury complex in Ontario, Canada, may be the most valuable igneous body on earth. Originally, the rock was mined for copper, but it is also nickel-rich and is the largest independent nickel deposit in the world today. In addition, it offers a wide range of economically valuable metals such as cobalt, iridium, osmium, palladium, platinum, rhodium and ruthenium. However, how did this shuttle-like structure be produced? Dietz (Journal of Geology, V.72, p.412, 1964) suggested more than 20 years ago that the structure may have been hit by giant meteorites. According to him, such an impact could rupture the crust and make the crust deep