硅镁层

硅镁层是地球化学中指富含硅酸盐矿物组成的地壳。硅镁层出露到地表的代表是玄武岩大洋地壳主要是硅镁层。[1]

岩石学研究表明,相比硅铝层,硅镁层密度更大(2800 到 3300 kg/m3),这是因为铁、镁含量更高,铝含量降低。硅镁层岩石也叫铁镁质。密度最大的硅镁层岩石是硅含量最少的超基性岩[2]


参考文献编辑

  1. ^ Bates, R.L., and Jackson, J.A., (1987) Glossary of geology American Geological Institute, Alexandria, Virginia.
  2. ^ Dilek, Y. and Newcomb, S. (eds.) (2003) Ophiolite Concept and the Evolution of Geological Thought Geological Society of America Special Paper 373, Boulder, Colorado.