江西玉华山高位复式深成杂岩体岩石谱系单位划分及定位机制分析

玉华山岩体是一个高位复式深成杂岩体，具成分和结构演化序列。根据同源岩浆演化的观点、岩石谱系单位的划分方法，将该杂岩体划分为窑里超单元、蜜蜂街超单元、玉华山超单元和桃溪独立单元，并通过对其组构、变形、空间展布和区域构造特征的分析，提出其定位的隐爆拓宽机制、岩墙扩张机制及火山口塌陷机制。

LITHOODEMIC DIVISION AND EMPLACEMENT MECHANISM OF THE YUHUASHAN HIGH-LEVEL COMPOSITE PLUTON IN JIANGXI

The Yuhuashan rock body in Jiangxi is a high-level composite plutonic complex,which hascompositional and structual evolutiOnary sequences.From the viewpoint of comagmatic evolu-tion and using the method of lithodemic division,the complex can be divided into the Yaoli su-perunit,Mifengjie superunit,Yuhuashan superunit and Taoxi independent unit.On the basis ofan analysis of the fabrics,features of deformation,spatial distribution and regional structuralfeatures,this paper puts forward the mechanisms of cryptoexplosion dilation,dike dilation andcrater collapse for the emplacement of the complex.