底侵作用（underplating）曾称板底垫托作用。是大陆垂向生长的一种重要方式，特别是在太古宙时期。
西部壳幔过渡带较厚而东部较薄，反映两地不同的岩浆底侵作用程度。
The crust mantle transition in the west is considerably thicker than in the east, probably due to different extents of magmatic underplating.
岩石圈伸展及幔源玄武质岩浆底侵作用可能是区域上大规模岩浆活动与成矿作用的深部地球动力学因素。
Magma underplating and subsequent lithospheric extension could have been the geodynamic setting responsible for the voluminous magmatism and large-scale mineralization.
幔源岩浆的底侵及软流圈对地壳的直接加热作用，使上覆地壳发生大规模的岩浆和成矿作用，并导致中国东部中生代时期伸展构造的广泛发育。
The heating from the asthenosphere on the crust subsequently resulted in the intensive magmatism, mineralization, and widespread development of extensional structures in eastern China.
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