硅鎂層是地球化學中指富含硅酸鹽礦物組成的地殼。硅鎂層出露到地表的代表是玄武岩大洋地殼主要是硅鎂層。[1]

岩石學研究表明,相比硅鋁層,硅鎂層密度更大(2800 到 3300 kg/m3),這是因為鐵、鎂含量更高,鋁含量降低。硅鎂層岩石也叫鐵鎂質。密度最大的硅鎂層岩石是硅含量最少的超基性岩[2]


參考文獻

  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.