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美国科罗拉多州西南部Gunnison郡铁山Powderhorn寒武纪碱性杂岩体不仅以其成因独特。岩石矿物丰富多采闻名于世,而且也以其矿床规模宏伟,多种矿产资源能综合利用著称。此深源岩浆成因的超基性岩系列碳酸盐岩杂岩体展布面积超过五十平方公里,由辉岩、辉石黄长石岩、霓霞岩、霞石正长岩、辉石—正长岩、碳酸岩和磁铁矿-钛铁矿-钙钛矿分凝物等组成。这些岩石的生成年代顺序由老到新依次为辉岩。磁铁矿-钛铁 矿-钙钛
The Powderhorn Cambrian alkaline complex in Gunnison County, southwestern Colorado, is not unique for its genesis. Rock minerals are famous for their abundance and diversity, and are also known for their magnificent mineral deposits and comprehensive utilization of various mineral resources. The ultramafic magmatic source rocks of this deep-sourced magmatic series have an area of more than 50 square kilometers and are composed of pyroxene, pyroxene feldspar, niixia, nepheline syenite, pyroxene Feldspar, carbonate and magnetite - ilmenite - perovskite condensate and other components. The generation sequence of these rocks from old to new followed by Hui rock. Magnetite - ilmenite - calcium titanium