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花岗岩是大陆地壳的主要组成成分,研究历史悠久,花岗岩成因的研究吸引着一代又一代的地质人。通过综合相关学者的研究成果,本文对当代花岗岩成因的研究情况分以下4个方面进行阐述:(1)花岗岩的结晶作用;(2)花岗岩的混合作用;(3)花岗岩形成的构造环境;(4)花岗岩的源岩组成。通过分析认为,花岗岩类型的多样性与其源岩组成关系最大,地球上只有少数花岗岩可以探讨其形成的构造环境,花岗岩的构造判别并没有普遍意义;源岩可分为地壳源区,玄武岩源区和二者间过渡区;由于酸性岩浆黏度较大,结晶分离分离作用不易发生;花岗质岩浆混合能力较差,多形成机械混合;本文还对花岗岩的地域分布进行了简要阐述。
Granite is the main component of the continental crust, the study has a long history, the origin of granite research attracted geologists from generation to generation. By synthesizing the research results of related scholars, this paper describes the research on the genesis of contemporary granite in the following four aspects: (1) the crystallization of granite; (2) the mixing of granite; (3) the tectonic setting of granite; 4) granite source rock composition. According to the analysis, the diversity of granite types has the largest relationship with the source rock composition. Only a few granites on the earth can explore the tectonic setting of the granite. The granite structural discrimination is of no universal significance. The source rocks can be divided into crustal source areas, basaltic source areas And the transitional zone between the two. Because of the high viscosity of acidic magma, the crystallization separation and separation are not easy to occur; the granite magma mixing ability is poor, and more forms of mechanical mixing; the geographical distribution of granite is also briefly described.