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花岗岩类岩石组成了上部陆壳层的主体,它是地表分布最广的侵入岩,经常形成大的岩基、石株、岩墙等。据资料,花岗岩类(包括花岗岩、片麻状花岗岩及片麻岩)岩石在我国出露的面积约为85万平方公里,主要集中分布在东南,东西、西北以及秦岭一带。尤其是东南沿海一带,花岗岩类岩石广泛分布,如闽、粤两省,花岗岩分布面积占全省面积的近1/3,以东南五省(湘、赣,闽、粤、桂)为例,全部面积约为95万平方公里,而花岗岩则占有19万平方公里,约占1/5。
Granite rocks form the main body of the upper continental crust, which is the most widely distributed intrusion rock, often forming large rock base, stone, rock wall and so on. According to statistics, granite (including granite, gneissic granite and gneiss) rock exposed in China, an area of about 850,000 square kilometers, mainly concentrated in the southeast, east-west, northwest and Qinling area. Especially in the southeastern coastal areas, the granitic rocks are widely distributed. For example, the distribution area of granite in Fujian and Guangdong Provinces accounts for nearly 1/3 of the total area of the province, taking the five provinces of Southeast Hunan (Hunan, Jiangxi, Fujian, Guangdong and Guangxi) as an example, The total area of about 950,000 square kilometers, while the granite is the possession of 190,000 square kilometers, accounting for about 1/5.