During Archaean asthenosphere-lithosphere interaction and post-Archaean interactionwith the deep mantle and other hot spots The Archaean lithospheric mantle beneath SouthAfrica experienced processes of crustal extraction.

• 太古代岩石圈地幔以南非为代表，经历了从地壳物质提取的亏损过程到与软流圈反应和与深部热点物质作用的富集过程。