原生铬铁矿矿床仅仅赋存在粒状超镁铁岩中,超镁铁岩与铬铁矿富集体之间存在着过渡关系,超镁铁岩与铬铁矿岩的地球化学亲缘关系以及其他的许多因素,都表明这两类岩石有着密切的关系。这种关系在辉长-橄榄岩杂岩体中特别清楚(例如,布什维尔德岩盆和斯提尔瓦特杂岩体),很明显那里的铬铁矿岩是由重力分异生成的,铬铁矿 The primary chromite deposits only exist in granular ultramafic rocks. There is a transitional relationship between ultramafic and chromite accumulations, geochemical relationships between ultramafic and chromititites, and many others Factors that have shown that these two types of rocks are closely related. This relationship is particularly evident in the gabbro-peridotite complex (eg, the Bushvelle basin and the Steierwart complex), and it is clear that the chromite rocks there are differentiated by gravitational forces and that chromium iron ore