【摘要】 文章着重介绍了纳米比亚欢乐谷地区白岗岩的微量元素地球化学特征。该区不同类型的白岗岩具有不同的球粒陨石标准化稀土元素配分曲线型式,微量元素含量变化范围较大,原始地幔标准化微量元素曲线显示相对分散,反映其物源区在成分上存在某种程度的不均一性,以及不同类型的白岗岩具有不同的物源区。白岗岩可能是由前达马拉基底岩石经部分熔融作用所形成,其微量元素总体上显示出壳源的特征。更多还原

【Abstract】 This paper studied the trace element geochemical characteristics of the alaskite in the Gaudeanmus area,Namibia.According to the characteristics of trace elements,the source of alaskite shows the crust origin.Different type alaskites show different chondrite-normalized REE patterns which display variable trace element content,and their primative mantal-normalized trace element patterns are relative dispersed.All the above-mentioned indicates in some extent that the component of provenance area is inhomogenity and different provenance area produced different types alaskites.Therefore,alaskites in the region might be formed by partial melting of heterogeneous Pre-Damara basement rocks.更多还原