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美国东南蒙大拿州的Stilwater杂岩是太古代(2701+8Ma)一大型的基性和超基性层状侵入体,赋存了有意义的岩浆矿床。该杂岩划分为薄层的主要由苏长岩和古铜辉岩组成的底部岩系(30～100m);橄榄古铜辉岩的超镁铁岩系(1000～2000m);和主要富斜长石组分的带状岩系(3000～4000m)。低品位Cu-Ni硫化物矿床产于侵入
The Stilwater complex in the southeastern Montana state of the United States is a large basaltic and ultrabasic intrusive of the Archean (2701 + 8 Ma) that contains significant magmatic deposits. The complex is subdivided into thin bedrock basalts (30-100 m) consisting mainly of tetrhiorite and palaeohigollogen; ultramafic rock series (1000-2000 m) of olivine pyroxene; and major plagioclase feldspar Components of the belt rock (3000 ~ 4000m). Low-grade Cu-Ni sulfide deposits are produced invade