深成岩

深成岩（英語：）是一種火成岩，生成于地壳的较深處(>2 km)，因為在地下缓慢冷却，使得矿物具有大的结晶粒度。常为斑岩纹理。常见的深成岩有花崗岩、辉绿岩(粗玄岩)。[1][2]

犹他州的Notch Peak的侏罗纪深成岩：紫色的二長岩侵入灰色沉积岩之下，随地层抬升而暴露。

另一概念侵入岩（英語：）是指由火成侵入作用形成的火成岩，經常被視為深成岩的同義詞。[3]

語源

这个英文术语起源于罗马神话中地下世界的主宰冥王普鲁托。十八世纪末水成论与火成论的地质学大论战时命名。也被視為火成侵入的同義詞。

. [12 June 2015]. （原始内容存档于2020-05-06）.
. [14 June 2015]. （原始内容存档于2015-06-03）.
. National Park Services, U.S. Department of Interior. [2023-12-21]. （原始内容存档于2024-02-11）（英语）. Intrusive igneous rocks solidify within Earth. These rocks are also known as plutonic rocks

Glazner, A. F., Bartley, J. M., Coleman, D. S., Gray, W. and Taylor, R. Z. (2004). "Are plutons assembled over millions of years by amalgamation from small magma chambers?" GSA Today, 14 (4: April), pp. 4–11.
Young, Davis A. (2003). Mind Over Magma: the Story of Igneous Petrology. Princeton University Press. ISBN 0-691-10279-1.
Best, Myron G. (1982). Igneous and Metamorphic Petrology. San Francisco: W. H. Freeman & Company. pp. 119 ff. ISBN 0-7167-1335-7.

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