意大利境内有多种类型的镁铁质和超镁铁质岩石,其中不少伴生有重要工业价值的矿床。这些岩石分属于不同地质时代。最古老的产于撒丁地区的寒武系内,似乎是一种地台型的火山活动,含有大量铅、锌、铜、氟和钡。这些金属量达几百万吨,它们赋存于诸如具有还原性质的小海岸盆地中,并发生过一系列再富集作用,构造作用、热变质作用和浅成作用等。在喀里多尼亚变质作用发育之前,沉积 There are several types of mafic and ultramafic rocks in Italy, many of which are associated with important industrial value deposits. These rocks belong to different geological times. The oldest Cambrian originating in the Sardinian region appears to be a platform-type volcanic activity containing large amounts of lead, zinc, copper, fluorine and barium. These metals, which weigh up to several million tons, are found in small coastal basins such as those of reduced nature and have undergone a series of re-enrichment, tectonism, thermal metamorphism and facultative effects. Precipitate before development of metamorphic Caledonian