摘要
花岗岩类成因的完整概念,包括岩浆的物质来源与一定来源的物质通过怎样的途径(或方式)形成花岗岩浆并最终形成花岗岩(即岩石的形成作用)这两个方面;此即国内外许多岩石学家所倡导的岩浆物质来源与岩石形成作用相结合的现代岩石学分类思想。对于花岗岩类的总的成因分类,孤立地强调这两个方面的某一个方面,都是片面的。同时,自然界产出的花岗岩是多种多样的;其产出和形成的条件,也是千差万别、错综复杂的。因此,仅仅停留在笼统的总的花岗岩成因分类上,远远不能反映自然界客观产出的花岗岩类的复杂面貌。完整的花岗岩成因分类,必须是递次挨级的多级成因分类。基于上述思想,作者提出了华南花岗岩类三级成因分类的划分方案(见表1),并对三级分类的基本概念、分类依据、准则和命名原则,以及花岗岩成矿的专属性等问题,分别进行了必要的讨论。
A complete concept of the origin of granide should include the both aspects:Where does the magmatic matter come fron all how does the matter from a certain source become granitic magma and eventurally forming granite.This is the view of the modern petrological clclassifi- cation proposed by many home and foreign petrologists.It has combined matter resource of magma with diagenesis of rock.Of the two aspects, it is lopsided to place emphasis on one side along but to ignore the other in respect to the general genetical classification of granide. Moreover,natural granitic rocks are various and the conditions of their occurence and diagenesis are greatly different and comnplicatd.Conse- quently,the general classification of the genetic types of granites can not completely reflect the complicated appearance of the granide objectively occurring in the nature.A complete genetic classification of granide should be multigraded and successive.It is based on the above view that the authors have proposed the scheme of the three—order genetic classification of granitoid of south China(see Table 1)and discussed some basic concepts,bases and criteria of the classification, the nomenclature principles as well as the metallogenic specialization of granite respectively.
